├── .gitignore ├── LICENSE ├── README.md ├── UML-class-diagram.dia ├── fritzing-parallel.fzz ├── fritzing-parallel_bb.png ├── fritzing-usb-ch375.fzz └── printserver ├── DirectParallelPortPrinter.cpp ├── DirectParallelPortPrinter.h ├── HttpStream.cpp ├── HttpStream.h ├── IppStream.cpp ├── IppStream.h ├── ParallelPortPrinter.cpp ├── ParallelPortPrinter.h ├── PrintQueue.cpp ├── PrintQueue.h ├── Printer.cpp ├── Printer.h ├── SerialPortPrinter.cpp ├── SerialPortPrinter.h ├── Settings.h ├── ShiftRegParallelPortPrinter.cpp ├── ShiftRegParallelPortPrinter.h ├── TcpPrintServer.cpp ├── TcpPrintServer.h ├── TcpStream.cpp ├── TcpStream.h ├── USBPortPrinter.cpp ├── USBPortPrinter.h ├── WiFiManager.cpp ├── WiFiManager.h └── printserver.ino /.gitignore: -------------------------------------------------------------------------------- 1 | *~ 2 | *.autosave 3 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ### Note: Library update required 2 | 3 | If you are getting the following compile error: 4 | 5 | ```no matching function for call to 'CH375::setBaudRate(int, USBPortPrinter::ensureInitialized()::__lambda0)``` 6 | 7 | you need to update the [CH375-Arduino](https://github.com/gianluca-nitti/CH375-Arduino) library to the [`6a78463`](https://github.com/gianluca-nitti/CH375-Arduino/commit/6a7846306f029d99621b5b8d5f409cc859f955e2) commit. 8 | 9 | # printserver-esp8266 10 | 11 | * This project allows you to use an ESP8266 as a Wi-Fi print server. 12 | * It works with the [IPP protocol](https://en.wikipedia.org/wiki/Internet_Printing_Protocol); the connected printers are accessible at `ipp://esp-ip-address:631/printer-name`, where the printer names can be configured in the `printserver/printserver.ino` file. By default, two printers are available, "parallel" which points to a real printer with the parallel port connected to the board's GPIOs and "serial" which prints the data to the serial UART (for debugging purposes). 13 | * The "AppSocket" or "HP JetDirect" protocol is also supported (on the TCP port 9100), but only for the first printer. 14 | * If a new connection arrives while a print job is being processed, the new job is stored in the SPIFFS filesystem (must fit in ~3MB, otherwise it's discarded due to lack of space) and printed as soon as the printer is ready. Unfortunately this feature has poor performance due to the very low speed of the SPIFFS filesystem. 15 | * It's mainly aimed at parallel port printers, which can be connected in two different ways: 16 | * Directly (uses 10 GPIO pins - one for BUSY, one for STROBE and 8 for the data lines) 17 | * Using a shift register, which reduces the amount of required pins to 5 (BUSY, STROBE, and 3 to drive the shift register to which the data lines are connected; currently tested with a 74HC595) 18 | * Also supports USB printers through the USB host chip CH375 and a custom [library](https://github.com/gianluca-nitti/CH375-Arduino); the provided schematic uses a CH375 module as [shown in this issue](https://github.com/gianluca-nitti/printserver-esp8266/issues/22). 19 | * Experimental support for serial printers (not tested with real ones, only with the serial monitor) 20 | * If the device fails to connect to the latest used WiFi network (for example the first time you flash the sketch), it will start an access point you can connect to. The web interface can then be used to select the network you want to connect the device to. 21 | 22 | ## Useful links 23 | * Socket/JetDirect protocol: http://lprng.sourceforge.net/LPRng-Reference-Multipart/socketapi.htm 24 | * IPP protocol: RFCs [8010](https://tools.ietf.org/html/rfc8010) and [8011](https://tools.ietf.org/html/rfc8011) 25 | * Parallel port: 26 | * Wikipedia: https://en.wikipedia.org/wiki/Parallel_port 27 | * Full specification (IEEE 1284): http://ieeexplore.ieee.org/document/469123/ 28 | * Arduino forum thread: https://forum.arduino.cc/index.php?topic=74776.0 29 | 30 | ## Wiring diagram for parallel port printer with 74HC595 shift register 31 | 32 | ![Image](fritzing-parallel_bb.png) 33 | 34 | As kindly reported in [issue #18](https://github.com/gianluca-nitti/printserver-esp8266/issues/18) (read the linked discussion for more details), a couple of improvements can be made to this schematic. In particular, the BUSY signal from the printer can be converted fom 5V to 3.3V, for example by making a simple voltage divider with a couple of resistors of appropriate value, to further protect the ESP8266 input pin. It's not 100% clear whether it's 5V tolerant. 35 | 36 | ## Photo with HP DeskJet 840C 37 | 38 | ![Image](https://i.imgur.com/ncwKbEl.jpg) 39 | 40 | ## Class diagram 41 | 42 | ![Image](https://i.imgur.com/AlZDUHW.png) 43 | -------------------------------------------------------------------------------- /UML-class-diagram.dia: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gianluca-nitti/printserver-esp8266/afc98315b0b02709cbbfb3e4fd371374cd6d98c1/UML-class-diagram.dia -------------------------------------------------------------------------------- /fritzing-parallel.fzz: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gianluca-nitti/printserver-esp8266/afc98315b0b02709cbbfb3e4fd371374cd6d98c1/fritzing-parallel.fzz -------------------------------------------------------------------------------- /fritzing-parallel_bb.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gianluca-nitti/printserver-esp8266/afc98315b0b02709cbbfb3e4fd371374cd6d98c1/fritzing-parallel_bb.png -------------------------------------------------------------------------------- /fritzing-usb-ch375.fzz: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/gianluca-nitti/printserver-esp8266/afc98315b0b02709cbbfb3e4fd371374cd6d98c1/fritzing-usb-ch375.fzz -------------------------------------------------------------------------------- /printserver/DirectParallelPortPrinter.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "DirectParallelPortPrinter.h" 19 | 20 | DirectParallelPortPrinter::DirectParallelPortPrinter(String _printerId, int _dataPins[8], int _strobePin, int _busyPin): ParallelPortPrinter(_printerId, _strobePin, _busyPin) { 21 | for (int i = 0; i < 8; i++) { 22 | dataPins[i] = _dataPins[i]; 23 | pinMode(dataPins[i], OUTPUT); 24 | } 25 | } 26 | 27 | void DirectParallelPortPrinter::setDataBus(byte b) { 28 | for (int i = 0; i < 8; i++) { 29 | digitalWrite(dataPins[i], bitRead(b, i)); 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /printserver/DirectParallelPortPrinter.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include "ParallelPortPrinter.h" 20 | 21 | class DirectParallelPortPrinter: public ParallelPortPrinter { 22 | private: 23 | int dataPins[8]; 24 | protected: 25 | void setDataBus(byte b); 26 | public: 27 | DirectParallelPortPrinter(String _printerId, int _dataPins[8], int _strobePin, int _busyPin); 28 | }; 29 | -------------------------------------------------------------------------------- /printserver/HttpStream.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "HttpStream.h" 19 | 20 | HttpStream::HttpStream(WiFiClient conn): TcpStream(conn) { 21 | } 22 | 23 | void HttpStream::parseNextChunkLength() { 24 | String chunkLength = TcpStream::readStringUntil('\r'); 25 | TcpStream::read(); //consume '\n' 26 | remainingChunkBytes = (int) strtol(chunkLength.c_str(), NULL, 16); 27 | } 28 | 29 | byte HttpStream::read() { 30 | byte result = TcpStream::read(); 31 | remainingChunkBytes--; 32 | if (requestChunkedEncoded && remainingChunkBytes == 0) { 33 | // consume CRLF chunk end delimiter 34 | TcpStream::read(); 35 | TcpStream::read(); 36 | parseNextChunkLength(); 37 | } 38 | return result; 39 | } 40 | 41 | bool HttpStream::hasMoreData() { 42 | return TcpStream::hasMoreData() && remainingChunkBytes != 0; 43 | } 44 | 45 | bool HttpStream::parseRequestHeader() { 46 | requestMethod = readStringUntil(' '); 47 | if (requestMethod == "") { 48 | return false; 49 | } 50 | requestPath = readStringUntil(' '); 51 | if (requestPath == "") { 52 | return false; 53 | } 54 | 55 | readStringUntil('\r'); 56 | read(); //consume the '\n' 57 | 58 | bool chunkedEncoded = false; 59 | String header; 60 | while ((header = readStringUntil('\r')) != "") { 61 | header.toLowerCase(); //does not return a new string, modifies the existing one in-place (source: https://github.com/esp8266/Arduino/blob/master/cores/esp8266/WString.cpp#L732) 62 | if (header.startsWith(CONTENT_LENGTH_HEADER)) { 63 | requestContentLength = header.substring(STRLEN(CONTENT_LENGTH_HEADER)).toInt(); 64 | chunkedEncoded = false; 65 | remainingChunkBytes = requestContentLength; 66 | } else if (header == CHUNKED_ENCODING_HEADER) { 67 | chunkedEncoded = true; 68 | remainingChunkBytes = 0; 69 | } 70 | read(); //consume the '\n' 71 | } 72 | read(); //consume the '\n' 73 | 74 | requestChunkedEncoded = chunkedEncoded; 75 | if (chunkedEncoded) { 76 | parseNextChunkLength(); 77 | } 78 | return true; 79 | } 80 | 81 | std::map HttpStream::parseUrlencodedRequestBody() { 82 | std::map result; 83 | int parsedBytes = 0; 84 | while (parsedBytes < requestContentLength) { 85 | String key, value; 86 | key.reserve(32); 87 | value.reserve(32); 88 | char readChar; 89 | while (parsedBytes < requestContentLength && ((readChar = read()) != '=')) { 90 | key += readChar; 91 | parsedBytes++; 92 | } 93 | parsedBytes++; // '=' 94 | while (parsedBytes < requestContentLength && ((readChar = read()) != '&')) { 95 | value += readChar; 96 | parsedBytes++; 97 | } 98 | parsedBytes++; // '&' 99 | result[key] = value; 100 | } 101 | return result; 102 | } 103 | 104 | String HttpStream::getRequestMethod() { 105 | return requestMethod; 106 | } 107 | 108 | String HttpStream::getRequestPath() { 109 | return requestPath; 110 | } 111 | -------------------------------------------------------------------------------- /printserver/HttpStream.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include 21 | #include 22 | #include "Settings.h" 23 | #include "TcpStream.h" 24 | 25 | #define STRLEN(s) ((sizeof(s) / sizeof(s[0])) - 1) 26 | 27 | #define CONTENT_LENGTH_HEADER "content-length: " 28 | #define CHUNKED_ENCODING_HEADER "transfer-encoding: chunked" 29 | 30 | class HttpStream: public TcpStream { 31 | private: 32 | String requestMethod = ""; 33 | String requestPath = ""; 34 | int requestContentLength = 0; 35 | bool requestChunkedEncoded = false; 36 | int remainingChunkBytes = 0; 37 | 38 | void parseNextChunkLength(); 39 | public: 40 | HttpStream(WiFiClient conn); 41 | 42 | byte read(); 43 | bool hasMoreData(); 44 | 45 | bool parseRequestHeader(); 46 | std::map parseUrlencodedRequestBody(); 47 | String getRequestMethod(); 48 | String getRequestPath(); 49 | }; 50 | -------------------------------------------------------------------------------- /printserver/IppStream.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "Settings.h" 19 | #include "WiFiManager.h" 20 | #include "IppStream.h" 21 | 22 | std::set allPrinterDescriptionAttributes { 23 | "charset-configured", 24 | "charset-supported", 25 | "compression-supported", 26 | "document-format-default", 27 | "document-format-supported", 28 | "generated-natural-language-supported", 29 | "ipp-versions-supported", 30 | "natural-language-configured", 31 | "operations-supported", 32 | "pdl-override-supported", 33 | "printer-name", 34 | "printer-is-accepting-jobs", 35 | "printer-state", 36 | "printer-state-reasons", 37 | "printer-up-time", 38 | "printer-uri-supported", 39 | "queued-job-count", 40 | "uri-authentication-supported", 41 | "uri-security-supported" 42 | }; 43 | 44 | IppStream::IppStream(WiFiClient conn): HttpStream(conn) { 45 | } 46 | 47 | std::map> IppStream::parseRequestAttributes() { 48 | std::map> result; 49 | byte tag = read(); 50 | if (tag == IPP_OPERATION_ATTRIBUTES_TAG) { 51 | String name = ""; 52 | int index = 0; 53 | while ((tag = read()) >= 0x10) { //if tag >= 0x10, then it's a value-tag 54 | uint16_t nameLength = read2Bytes(); 55 | if (nameLength != 0) { 56 | name = readString(nameLength); 57 | } //otherwise, it's another value for the previous attribute 58 | uint16_t valueLength = read2Bytes(); 59 | String value = readString(valueLength); 60 | if ((index == 0 && name != "attributes-charset") || (index == 1 && name != "attributes-natural-language")) { 61 | result.clear(); 62 | return result; 63 | } 64 | result[name].insert(value); 65 | index++; 66 | //Serial.printf("Parsed IPP attribute: tag=0x%02X, name=\"%s\", value=\"%s\"\r\n", tag, name.c_str(), value.c_str()); 67 | } 68 | } 69 | return result; 70 | } 71 | 72 | void IppStream::beginResponse(uint16_t statusCode, uint32_t requestId, String charset) { 73 | print("HTTP/1.1 100 Continue\r\n\r\nHTTP/1.1 200 OK\r\nContent-Type: application/ipp\r\n\r\n"); 74 | write2Bytes(IPP_SUPPORTED_VERSION); 75 | write2Bytes(statusCode); 76 | write4Bytes(requestId); 77 | write(IPP_OPERATION_ATTRIBUTES_TAG); 78 | writeStringAttribute(IPP_VALUE_TAG_CHARSET, "attributes-charset", charset); 79 | writeStringAttribute(IPP_VALUE_TAG_NATURAL_LANGUAGE, "attributes-natural-language", "en-us"); 80 | } 81 | 82 | void IppStream::writeStringAttribute(byte valueTag, String name, String value) { 83 | write(valueTag); 84 | write2Bytes((uint16_t) name.length()); 85 | print(name); 86 | write2Bytes((uint16_t) value.length()); 87 | print(value); 88 | } 89 | 90 | void IppStream::writeByteAttribute(byte valueTag, String name, byte value) { 91 | write(valueTag); 92 | write2Bytes((uint16_t) name.length()); 93 | print(name); 94 | write2Bytes(1); 95 | write(value); 96 | } 97 | 98 | void IppStream::write2BytesAttribute(byte valueTag, String name, uint16_t value) { 99 | write(valueTag); 100 | write2Bytes((uint16_t) name.length()); 101 | print(name); 102 | write2Bytes(2); 103 | write2Bytes(value); 104 | } 105 | 106 | void IppStream::write4BytesAttribute(byte valueTag, String name, uint32_t value) { 107 | write(valueTag); 108 | write2Bytes((uint16_t) name.length()); 109 | print(name); 110 | write2Bytes(4); 111 | write4Bytes(value); 112 | } 113 | 114 | void IppStream::writePrinterAttribute(String name, Printer* printer) { 115 | if (name == "charset-configured") { 116 | writeStringAttribute(IPP_VALUE_TAG_CHARSET, name, "utf-8"); 117 | } else if (name == "charset-supported") { 118 | writeStringAttribute(IPP_VALUE_TAG_CHARSET, name, "utf-8"); 119 | } else if (name == "compression-supported") { 120 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, name, "none"); 121 | } else if (name == "document-format-default") { 122 | writeStringAttribute(IPP_VALUE_TAG_MIME_MEDIA_TYPE, name, "text/plain"); //TODO - get from printer? 123 | } else if (name == "document-format-supported") { 124 | writeStringAttribute(IPP_VALUE_TAG_MIME_MEDIA_TYPE, name, "text/plain"); //TODO - get from printer? 125 | } else if (name == "generated-natural-language-supported") { 126 | writeStringAttribute(IPP_VALUE_TAG_NATURAL_LANGUAGE, name, "en-us"); 127 | } else if (name =="ipp-versions-supported") { 128 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, name, "1.1"); 129 | } else if (name == "natural-language-configured") { 130 | writeStringAttribute(IPP_VALUE_TAG_NATURAL_LANGUAGE, name, "en-us"); 131 | } else if (name == "operations-supported") { 132 | write4BytesAttribute(IPP_VALUE_TAG_ENUM, name, IPP_PRINT_JOB); 133 | write4BytesAttribute(IPP_VALUE_TAG_ENUM, "", IPP_VALIDATE_JOB); 134 | //write4BytesAttribute(IPP_VALUE_TAG_ENUM, "", IPP_CANCEL_JOB); 135 | //write4BytesAttribute(IPP_VALUE_TAG_ENUM, "", IPP_GET_JOB_ATTRIBUTES); 136 | //write4BytesAttribute(IPP_VALUE_TAG_ENUM, "", IPP_GET_JOBS); 137 | write4BytesAttribute(IPP_VALUE_TAG_ENUM, "", IPP_GET_PRINTER_ATTRIBUTES); 138 | } else if (name == "pdl-override-supported") { 139 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, name, "not-attempted"); 140 | } else if (name == "printer-name") { 141 | writeStringAttribute(IPP_VALUE_TAG_NAME, name, printer->getName()); 142 | } else if (name =="printer-is-accepting-jobs") { 143 | writeByteAttribute(IPP_VALUE_TAG_BOOLEAN, name, 1); 144 | } else if (name == "printer-state") { 145 | write4BytesAttribute(IPP_VALUE_TAG_ENUM, name, 3); //3 = idle 146 | } else if (name == "printer-state-reasons") { 147 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, name, "none"); 148 | } else if (name == "printer-up-time") { 149 | write4BytesAttribute(IPP_VALUE_TAG_INTEGER, name, millis() / 1000); 150 | } else if (name == "printer-uri-supported") { 151 | writeStringAttribute(IPP_VALUE_TAG_URI, name, "ipp://" + WiFiManager::getIP() + ":" + String(IPP_SERVER_PORT) + "/" + printer->getName()); 152 | } else if (name == "queued-job-count") { 153 | write4BytesAttribute(IPP_VALUE_TAG_INTEGER, name, 0); 154 | } else if (name == "uri-authentication-supported") { 155 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, name, "none"); 156 | } else if (name == "uri-security-supported") { 157 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, name, "none"); 158 | } 159 | } 160 | 161 | void IppStream::handleGetPrinterAttributesRequest(std::map> requestAttributes, Printer* printer) { 162 | std::set& requestedAttributes = requestAttributes["requested-attributes"]; 163 | 164 | if (requestedAttributes.size() == 0 || (requestedAttributes.find("all") != requestedAttributes.end()) || (requestedAttributes.find("printer-description") != requestedAttributes.end())) { 165 | requestedAttributes = allPrinterDescriptionAttributes; 166 | } 167 | 168 | write(IPP_PRINTER_ATTRIBUTES_TAG); 169 | for (String attributeName: requestedAttributes) { 170 | writePrinterAttribute(attributeName, printer); 171 | } 172 | 173 | write(IPP_END_OF_ATTRIBUTES_TAG); 174 | } 175 | 176 | int IppStream::parseRequest(Printer** printers, int printerCount) { 177 | if (!parseRequestHeader()) { 178 | return -1; 179 | } 180 | 181 | if (getRequestMethod() != "POST") { 182 | print("HTTP/1.1 405 Method Not Allowed\r\n"); 183 | return -1; 184 | } 185 | 186 | Printer* printer = NULL; 187 | int printerIndex = -1; 188 | for (int i = 0; i < printerCount; i++) { 189 | if (("/" + printers[i]->getName()) == getRequestPath()) { 190 | printer = printers[i]; 191 | printerIndex = i; 192 | break; 193 | } 194 | } 195 | 196 | if (printer == NULL) { 197 | print("HTTP/1.1 404 Not Found\r\n"); 198 | return -1; 199 | } 200 | 201 | uint16_t ippVersion = read2Bytes(); 202 | uint16_t operationId = read2Bytes(); 203 | uint32_t requestId = read4Bytes(); 204 | Serial.printf("Received IPP request; Version: 0x%04X, OperationId: 0x%04X, RequestId: 0x%08X\r\n", ippVersion, operationId, requestId); 205 | 206 | if (ippVersion != IPP_SUPPORTED_VERSION) { 207 | Serial.println("Unsupported IPP version"); 208 | beginResponse(IPP_SERVER_ERROR_VERSION_NOT_SUPPORTED, requestId, "utf-8"); 209 | write(IPP_END_OF_ATTRIBUTES_TAG); 210 | return -1; 211 | } 212 | 213 | if (requestId == 0) { //request-id must not be 0 (RFC8011 Section 4.1.2) 214 | beginResponse(IPP_CLIENT_ERROR_BAD_REQUEST, requestId, "utf-8"); 215 | write(IPP_END_OF_ATTRIBUTES_TAG); 216 | return -1; 217 | } 218 | 219 | std::map> requestAttributes = parseRequestAttributes(); 220 | 221 | if (requestAttributes.size() == 0) { 222 | beginResponse(IPP_CLIENT_ERROR_BAD_REQUEST, requestId, "utf-8"); 223 | write(IPP_END_OF_ATTRIBUTES_TAG); 224 | return -1; 225 | } 226 | 227 | switch (operationId) { 228 | case IPP_GET_PRINTER_ATTRIBUTES: 229 | Serial.println("Operation is Get-printer-Attributes"); 230 | beginResponse(IPP_SUCCESFUL_OK, requestId, *requestAttributes["attributes-charset"].begin()); 231 | handleGetPrinterAttributesRequest(requestAttributes, printer); 232 | return -1; 233 | 234 | case IPP_PRINT_JOB: 235 | Serial.println("Operation is Print-Job"); 236 | beginResponse(IPP_SUCCESFUL_OK, requestId, *requestAttributes["attributes-charset"].begin()); 237 | write(IPP_JOB_ATTRIBUTES_TAG); 238 | write4BytesAttribute(IPP_VALUE_TAG_ENUM, "job-state", 5); //5 = processing 239 | writeStringAttribute(IPP_VALUE_TAG_KEYWORD, "job-state-reasons", "none"); 240 | write(IPP_END_OF_ATTRIBUTES_TAG); 241 | flushSendBuffer(); 242 | return printerIndex; 243 | 244 | case IPP_VALIDATE_JOB: 245 | Serial.println("Operation is Validate-Job"); 246 | beginResponse(IPP_SUCCESFUL_OK, requestId, *requestAttributes["attributes-charset"].begin()); 247 | write(IPP_END_OF_ATTRIBUTES_TAG); 248 | return -1; 249 | 250 | default: 251 | Serial.println("The requested operation is not supported!"); 252 | beginResponse(IPP_SERVER_ERROR_OPERATION_NOT_SUPPORTED, requestId, "utf-8"); 253 | write(IPP_END_OF_ATTRIBUTES_TAG); 254 | return -1; 255 | } 256 | } 257 | -------------------------------------------------------------------------------- /printserver/IppStream.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include 21 | #include 22 | #include 23 | #include "HttpStream.h" 24 | #include "Printer.h" 25 | 26 | #define IPP_SUPPORTED_VERSION 0x0101 27 | 28 | #define IPP_SUCCESFUL_OK 0x0000 29 | #define IPP_CLIENT_ERROR_BAD_REQUEST 0x0400 30 | #define IPP_SERVER_ERROR_OPERATION_NOT_SUPPORTED 0x0501 31 | #define IPP_SERVER_ERROR_VERSION_NOT_SUPPORTED 0x0503 32 | 33 | #define IPP_OPERATION_ATTRIBUTES_TAG 0x01 34 | #define IPP_JOB_ATTRIBUTES_TAG 0x02 35 | #define IPP_END_OF_ATTRIBUTES_TAG 0x03 36 | #define IPP_PRINTER_ATTRIBUTES_TAG 0x04 37 | #define IPP_UNSUPPORTED_ATTRIBUTES_TAG 0x05 38 | 39 | #define IPP_VALUE_TAG_UNSUPPORTED 0x10 40 | #define IPP_VALUE_TAG_INTEGER 0x21 41 | #define IPP_VALUE_TAG_BOOLEAN 0x22 42 | #define IPP_VALUE_TAG_ENUM 0x23 43 | #define IPP_VALUE_TAG_TEXT 0x41 44 | #define IPP_VALUE_TAG_NAME 0x42 45 | #define IPP_VALUE_TAG_KEYWORD 0x44 46 | #define IPP_VALUE_TAG_URI 0x45 47 | #define IPP_VALUE_TAG_CHARSET 0x47 48 | #define IPP_VALUE_TAG_NATURAL_LANGUAGE 0x48 49 | #define IPP_VALUE_TAG_MIME_MEDIA_TYPE 0x49 50 | 51 | #define IPP_PRINT_JOB 0x0002 52 | #define IPP_VALIDATE_JOB 0x0004 53 | #define IPP_CANCEL_JOB 0x0008 54 | #define IPP_GET_JOB_ATTRIBUTES 0x0009 55 | #define IPP_GET_JOBS 0x000A 56 | #define IPP_GET_PRINTER_ATTRIBUTES 0x000B 57 | 58 | class IppStream: public HttpStream { 59 | private: 60 | std::map> parseRequestAttributes(); 61 | void beginResponse(uint16_t statusCode, uint32_t requestId, String charset); 62 | 63 | void writeStringAttribute(byte valueTag, String name, String value); 64 | void writeByteAttribute(byte valueTag, String name, byte value); 65 | void write2BytesAttribute(byte valueTag, String name, uint16_t value); 66 | void write4BytesAttribute(byte valueTag, String name, uint32_t value); 67 | 68 | void writePrinterAttribute(String name, Printer* printer); 69 | void handleGetPrinterAttributesRequest(std::map> requestAttributes, Printer* printer); 70 | 71 | public: 72 | IppStream(WiFiClient conn); 73 | int parseRequest(Printer** printers, int printerCount); 74 | }; 75 | -------------------------------------------------------------------------------- /printserver/ParallelPortPrinter.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "ParallelPortPrinter.h" 19 | 20 | #define STROBE_DELAY 10 21 | 22 | ParallelPortPrinter::ParallelPortPrinter(String _printerId, int _strobePin, int _busyPin): Printer(_printerId) { 23 | strobePin = _strobePin; 24 | busyPin = _busyPin; 25 | pinMode(busyPin, INPUT); 26 | pinMode(strobePin, OUTPUT); 27 | digitalWrite(strobePin, HIGH); 28 | } 29 | 30 | bool ParallelPortPrinter::canPrint() { 31 | return digitalRead(busyPin) == LOW; 32 | } 33 | 34 | void ParallelPortPrinter::printByte(byte b) { 35 | while(!canPrint()) { 36 | //shouldn't happen - the caller should not call this function if canWrite returned false 37 | Serial.println("Printer busy!"); 38 | delay(100); 39 | } 40 | setDataBus(b); 41 | digitalWrite(strobePin, LOW); 42 | delayMicroseconds(STROBE_DELAY); 43 | digitalWrite(strobePin, HIGH); 44 | } 45 | 46 | String ParallelPortPrinter::getInfo() { 47 | //TODO: get meaningful info from the printer using IEEE 1284 nibble mode 48 | return "Parallel port printer"; 49 | } 50 | -------------------------------------------------------------------------------- /printserver/ParallelPortPrinter.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include "Printer.h" 20 | 21 | class ParallelPortPrinter: public Printer { 22 | private: 23 | int strobePin; 24 | int busyPin; 25 | protected: 26 | ParallelPortPrinter(String _printerId, int _strobePin, int _busyPin); 27 | bool canPrint(); 28 | void printByte(byte b); 29 | virtual void setDataBus(byte b) = 0; 30 | public: 31 | String getInfo(); 32 | }; 33 | -------------------------------------------------------------------------------- /printserver/PrintQueue.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "PrintQueue.h" 19 | 20 | size_t PrintQueue::availableFlashSpace = 0; 21 | 22 | void PrintQueue::updateAvailableFlashSpace() { 23 | FSInfo fsinfo; 24 | SPIFFS.info(fsinfo); 25 | availableFlashSpace = fsinfo.totalBytes - fsinfo.usedBytes; 26 | } 27 | 28 | PrintQueue::PrintQueue(String _printerId) { 29 | printerId = _printerId; 30 | } 31 | 32 | void PrintQueue::init() { 33 | loadInfo(); 34 | updateAvailableFlashSpace(); 35 | } 36 | 37 | void PrintQueue::saveInfo() { 38 | File infoFile = SPIFFS.open(printerId, "w"); 39 | infoFile.write(head); 40 | infoFile.write(tail); 41 | infoFile.close(); 42 | } 43 | 44 | void PrintQueue::loadInfo() { 45 | if (SPIFFS.exists(printerId)) { 46 | File infoFile = SPIFFS.open(printerId, "r"); 47 | head = infoFile.read(); 48 | tail = infoFile.read(); 49 | infoFile.close(); 50 | } else { 51 | head = 0; 52 | tail = 0; 53 | } 54 | } 55 | 56 | void PrintQueue::startJob(int clientId) { 57 | head++; 58 | fileWriters[clientId] = SPIFFS.open(printerId + String(head), "w"); 59 | saveInfo(); 60 | } 61 | 62 | void PrintQueue::endJob(int clientId, bool cancel) { 63 | String fName = fileWriters[clientId].name(); 64 | fileWriters[clientId].close(); 65 | if (cancel) { 66 | if(!SPIFFS.remove(fName)) { 67 | Serial.println("Warning: failed to remove " + fName); 68 | } 69 | } else { 70 | SPIFFS.rename(fName, fName + "OK"); 71 | } 72 | } 73 | 74 | bool PrintQueue::canStoreByte() { 75 | return availableFlashSpace > 4096; //4KiB margin 76 | } 77 | 78 | void PrintQueue::printByte(int clientId, byte b) { 79 | fileWriters[clientId].write(b); 80 | availableFlashSpace--; 81 | } 82 | 83 | bool PrintQueue::hasData() { 84 | if (fileReader && fileReader.available() > 0) { 85 | return true; 86 | } else { 87 | if (fileReader) { 88 | String fName = fileReader.name(); 89 | fileReader.close(); 90 | if(!SPIFFS.remove(fName)) { 91 | Serial.println("Warning: failed to remove " + fName); 92 | } 93 | } 94 | if (head == tail || SPIFFS.exists(printerId + String(tail + 1))) { 95 | return false; 96 | } else { 97 | tail++; 98 | fileReader = SPIFFS.open(printerId + String(tail) + "OK", "r"); 99 | saveInfo(); 100 | return fileReader.available() > 0; 101 | } 102 | } 103 | } 104 | 105 | byte PrintQueue::readData() { 106 | return fileReader.read(); 107 | } 108 | -------------------------------------------------------------------------------- /printserver/PrintQueue.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include 21 | #include "Settings.h" 22 | 23 | class PrintQueue { 24 | private: 25 | static size_t availableFlashSpace; 26 | 27 | String printerId; 28 | File fileWriters[MAXCLIENTS]; 29 | File fileReader; 30 | byte head; 31 | byte tail; 32 | void saveInfo(); 33 | void loadInfo(); 34 | public: 35 | static void updateAvailableFlashSpace(); 36 | 37 | PrintQueue(String _printerId); 38 | void init(); 39 | void startJob(int clientId); 40 | void endJob(int clientId, bool cancel); 41 | bool canStoreByte(); 42 | void printByte(int clientId, byte b); 43 | bool hasData(); 44 | byte readData(); 45 | }; 46 | -------------------------------------------------------------------------------- /printserver/Printer.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "Printer.h" 19 | 20 | Printer::Printer(String _printerId): queue(_printerId) { 21 | name = _printerId; 22 | } 23 | 24 | void Printer::init() { 25 | queue.init(); 26 | } 27 | 28 | void Printer::startJob() { 29 | } 30 | 31 | void Printer::endJob() { 32 | } 33 | 34 | void Printer::startJob(int clientId) { 35 | if (status == IDLE) { 36 | status = PRINTING_FROM_SERVER; 37 | printingClientId = clientId; 38 | startJob(); 39 | } else { 40 | queue.startJob(clientId); 41 | } 42 | } 43 | 44 | void Printer::endJob(int clientId, bool cancel) { 45 | if (status == PRINTING_FROM_SERVER && printingClientId == clientId) { 46 | status = IDLE; 47 | endJob(); 48 | } else { 49 | queue.endJob(clientId, cancel); 50 | } 51 | } 52 | 53 | bool Printer::canPrint(int clientId) { 54 | if (status == PRINTING_FROM_SERVER && printingClientId == clientId) { 55 | return canPrint(); 56 | } else { 57 | return queue.canStoreByte(); 58 | } 59 | } 60 | 61 | void Printer::printByte(int clientId, byte b) { 62 | if (status == PRINTING_FROM_SERVER && printingClientId == clientId) { 63 | printByte(b); 64 | } else { 65 | queue.printByte(clientId, b); 66 | } 67 | } 68 | 69 | void Printer::processQueue() { 70 | if (status == PRINTING_FROM_QUEUE) { 71 | if (queue.hasData()) { 72 | if(canPrint()) { 73 | printByte(queue.readData()); 74 | } 75 | } else { 76 | status = IDLE; 77 | } 78 | } else if (status == IDLE && queue.hasData()) { 79 | status = PRINTING_FROM_QUEUE; 80 | } 81 | } 82 | 83 | String Printer::getName() { 84 | return name; 85 | } 86 | -------------------------------------------------------------------------------- /printserver/Printer.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include "PrintQueue.h" 21 | 22 | typedef enum { 23 | IDLE, 24 | PRINTING_FROM_SERVER, 25 | PRINTING_FROM_QUEUE 26 | } printer_status; 27 | 28 | class Printer { 29 | private: 30 | printer_status status = IDLE; 31 | int printingClientId = 0; 32 | PrintQueue queue; 33 | String name; 34 | protected: 35 | Printer(String _printerId); 36 | // startJob() and endJob() do nothing by default, and can be overriden if a specifica 37 | // type of printer port has specific tasks to do before or after a print job 38 | virtual void startJob(); 39 | virtual void endJob(); 40 | virtual bool canPrint() = 0; 41 | virtual void printByte(byte b) = 0; 42 | public: 43 | void init(); 44 | void startJob(int clientId); 45 | void endJob(int clientId, bool cancel); 46 | bool canPrint(int clientId); 47 | void printByte(int clientId, byte b); 48 | void processQueue(); 49 | String getName(); 50 | virtual String getInfo() = 0; 51 | }; 52 | -------------------------------------------------------------------------------- /printserver/SerialPortPrinter.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "SerialPortPrinter.h" 19 | 20 | SerialPortPrinter::SerialPortPrinter(String _printerId, Stream* s): Printer(_printerId) { 21 | stream = s; 22 | } 23 | 24 | bool SerialPortPrinter::canPrint() { 25 | return true; 26 | } 27 | 28 | void SerialPortPrinter::printByte(byte b) { 29 | stream->write(b); 30 | } 31 | 32 | String SerialPortPrinter::getInfo() { 33 | return "Serial port printer"; 34 | } 35 | -------------------------------------------------------------------------------- /printserver/SerialPortPrinter.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include "Printer.h" 20 | 21 | class SerialPortPrinter: public Printer { 22 | private: 23 | Stream* stream; 24 | protected: 25 | bool canPrint(); 26 | void printByte(byte b); 27 | public: 28 | SerialPortPrinter(String _printerId, Stream* s); 29 | String getInfo(); 30 | }; 31 | -------------------------------------------------------------------------------- /printserver/Settings.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | 20 | #define MAXCLIENTS 4 21 | 22 | #define JOB_TIMEOUT_MS 4*60*1000 23 | #define NETWORK_READ_TIMEOUT_MS 10*1000 24 | 25 | #define SOCKET_SERVER_PORT 9100 26 | #define IPP_SERVER_PORT 631 27 | #define HTTP_SERVER_PORT 80 28 | -------------------------------------------------------------------------------- /printserver/ShiftRegParallelPortPrinter.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "ShiftRegParallelPortPrinter.h" 19 | 20 | ShiftRegParallelPortPrinter::ShiftRegParallelPortPrinter(String _printerId, int _dataPin, int _clkPin, int _latchPin, int _strobePin, int _busyPin): ParallelPortPrinter(_printerId, _strobePin, _busyPin) { 21 | dataPin = _dataPin; 22 | clkPin = _clkPin; 23 | latchPin = _latchPin; 24 | pinMode(dataPin, OUTPUT); 25 | pinMode(clkPin, OUTPUT); 26 | pinMode(latchPin, OUTPUT); 27 | } 28 | 29 | void ShiftRegParallelPortPrinter::setDataBus(byte b) { 30 | digitalWrite(latchPin, LOW); 31 | shiftOut(dataPin, clkPin, MSBFIRST, b); 32 | digitalWrite(latchPin, HIGH); 33 | } 34 | -------------------------------------------------------------------------------- /printserver/ShiftRegParallelPortPrinter.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include "ParallelPortPrinter.h" 20 | 21 | class ShiftRegParallelPortPrinter: public ParallelPortPrinter { 22 | private: 23 | int dataPin; 24 | int clkPin; 25 | int latchPin; 26 | protected: 27 | void setDataBus(byte b); 28 | public: 29 | ShiftRegParallelPortPrinter(String _printerId, int _dataPin, int _clkPin, int _latchPin, int _strobePin, int _busyPin); 30 | }; 31 | -------------------------------------------------------------------------------- /printserver/TcpPrintServer.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "WiFiManager.h" 19 | #include "Settings.h" 20 | #include "HttpStream.h" 21 | #include "IppStream.h" 22 | #include "TcpPrintServer.h" 23 | 24 | TcpPrintServer::TcpPrintServer(Printer** _printers, int _printerCount) : socketServer(SOCKET_SERVER_PORT), ippServer(IPP_SERVER_PORT), httpServer(HTTP_SERVER_PORT) { 25 | printers = _printers; 26 | printerCount = _printerCount; 27 | for (int i = 0; i < MAXCLIENTS; i++) { 28 | clients[i] = NULL; 29 | } 30 | } 31 | 32 | void TcpPrintServer::handleClient(int index) { 33 | Printer* printer = printers[clientTargetPrinters[index]]; 34 | if (clients[index]->hasMoreData()) { 35 | if (clients[index]->dataAvailable() && printer->canPrint(index)) { 36 | printer->printByte(index, clients[index]->read()); 37 | } 38 | } else { 39 | Serial.println("Disconnected"); 40 | delete clients[index]; 41 | clients[index] = NULL; 42 | printer->endJob(index, false); 43 | } 44 | } 45 | 46 | void TcpPrintServer::start() { 47 | socketServer.begin(); 48 | ippServer.begin(); 49 | httpServer.begin(); 50 | } 51 | 52 | int TcpPrintServer::getFreeClientSlot() { 53 | for (int i = 0; i < MAXCLIENTS; i++) { 54 | if (clients[i] == NULL) { 55 | return i; 56 | } 57 | } 58 | return -1; 59 | } 60 | 61 | void TcpPrintServer::processNewSocketClients() { 62 | int freeClientSlot = getFreeClientSlot(); 63 | if (freeClientSlot != -1) { 64 | WiFiClient newClient = socketServer.available(); 65 | if (newClient) { 66 | Serial.println("Connected: " + newClient.remoteIP().toString() + ":" + newClient.remotePort()); 67 | clients[freeClientSlot] = new TcpStream(newClient); 68 | clientTargetPrinters[freeClientSlot] = 0; 69 | printers[0]->startJob(freeClientSlot); 70 | } 71 | } 72 | } 73 | 74 | void TcpPrintServer::processNewIppClients() { 75 | WiFiClient _ippClient = ippServer.available(); 76 | if (_ippClient) { 77 | IppStream* ippClient = new IppStream(_ippClient); 78 | int freeClientSlot = getFreeClientSlot(); 79 | int targetPrinterIndex = ippClient->parseRequest(printers, printerCount); 80 | if (targetPrinterIndex != -1 && freeClientSlot != -1) { 81 | clients[freeClientSlot] = ippClient; 82 | clientTargetPrinters[freeClientSlot] = targetPrinterIndex; 83 | printers[targetPrinterIndex]->startJob(freeClientSlot); 84 | } else { 85 | delete ippClient; 86 | } 87 | } 88 | } 89 | 90 | void TcpPrintServer::processNewWebClients() { 91 | WiFiClient _httpClient = httpServer.available(); 92 | if (!_httpClient) { 93 | return; 94 | } 95 | unsigned long startTime = millis(); 96 | HttpStream newHttpClient(_httpClient); 97 | if (!newHttpClient.parseRequestHeader()) { 98 | return; 99 | } 100 | String method = newHttpClient.getRequestMethod(); 101 | String path = newHttpClient.getRequestPath(); 102 | Serial.printf("request parsed: %s %s\r\n", method.c_str(), path.c_str()); 103 | if (method == "GET" && path == "/") { 104 | newHttpClient.print("HTTP/1.1 200 OK \r\n\r\n

ESP8266 print server

WiFi configuration
Printers"); 105 | } else if (method == "GET" && path == "/printerInfo") { 106 | newHttpClient.print("HTTP/1.1 200 OK \r\n\r\n

Available printers

"); 107 | for (int i = 0; i < printerCount; i++) { 108 | String name = printers[i]->getName(); 109 | String ip = WiFiManager::getIP(); 110 | newHttpClient.print("

" + name + "

" + printers[i]->getInfo() + "

Accessible at:

  • ipp://" + ip + ":" + String(IPP_SERVER_PORT) + "/" + name + "
    • "); 111 | if (i == 0) { 112 | newHttpClient.print("
  • socket://" + ip + ":" + SOCKET_SERVER_PORT + "
    • "); 113 | } 114 | newHttpClient.print("
"); 115 | } 116 | } else if (method == "GET" && path == "/wifi") { 117 | newHttpClient.print("HTTP/1.1 200 OK \r\n\r\n

WiFi configuration

Status: "); 118 | newHttpClient.print(WiFiManager::info()); 119 | newHttpClient.print("

Available networks (choose one to connect):
    "); 120 | WiFiManager::getAvailableNetworks([&newHttpClient](String ssid, int encryption, int rssi) { 121 | newHttpClient.print("
  • " + ssid + " (" + WiFiManager::getEncryptionTypeName(encryption) + ", " + String(rssi) + " dBm)
    • "); 122 | }); 123 | newHttpClient.print("
Password (leave blank for open networks):
"); 124 | } else if (method == "POST" && path == "/wifi-connect") { 125 | std::map reqData = newHttpClient.parseUrlencodedRequestBody(); 126 | newHttpClient.print("HTTP/1.1 200 OK \r\n\r\n

OK

"); 127 | newHttpClient.flushSendBuffer(); 128 | WiFiManager::connectTo(reqData["SSID"].c_str(), reqData["password"]); 129 | } else { 130 | newHttpClient.print("HTTP/1.1 404 Not Found \r\n\r\n

Not found

"); 131 | } 132 | Serial.println("HTTP client handled in " + String(millis() - startTime) + "ms"); 133 | } 134 | 135 | void TcpPrintServer::process() { 136 | for (int i = 0; i < MAXCLIENTS; i++) { 137 | if (clients[i] != NULL) { 138 | handleClient(i); 139 | } 140 | } 141 | processNewSocketClients(); 142 | processNewIppClients(); 143 | processNewWebClients(); 144 | } 145 | 146 | void TcpPrintServer::printInfo() { 147 | int usedSlots = 0; 148 | for (int i = 0; i < MAXCLIENTS; i++) { 149 | if (clients[i] != NULL) { 150 | usedSlots++; 151 | } 152 | } 153 | Serial.printf("Server slots: %d/%d\n", usedSlots, MAXCLIENTS); 154 | } 155 | -------------------------------------------------------------------------------- /printserver/TcpPrintServer.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include 21 | #include 22 | #include 23 | #include "Settings.h" 24 | #include "TcpStream.h" 25 | #include "Printer.h" 26 | 27 | class TcpPrintServer { 28 | private: 29 | WiFiServer socketServer; 30 | WiFiServer ippServer; 31 | WiFiServer httpServer; 32 | TcpStream* clients[MAXCLIENTS]; 33 | int clientTargetPrinters[MAXCLIENTS]; 34 | Printer** printers; 35 | int printerCount; 36 | 37 | void handleClient(int index); 38 | 39 | int getFreeClientSlot(); 40 | void processNewSocketClients(); 41 | void processNewIppClients(); 42 | void processNewWebClients(); 43 | public: 44 | TcpPrintServer(Printer** _printers, int _printerCount); 45 | void start(); 46 | void process(); 47 | void printInfo(); 48 | }; 49 | -------------------------------------------------------------------------------- /printserver/TcpStream.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "TcpStream.h" 19 | 20 | TcpStream::TcpStream(WiFiClient s): tcpConnection(s) { 21 | timedOut = false; 22 | } 23 | 24 | void TcpStream::waitAvailable(int numBytes) { 25 | if (timedOut) { 26 | return; 27 | } 28 | unsigned long start = millis(); 29 | while (tcpConnection.available() < numBytes) { 30 | delay(10); 31 | if (millis() - start > NETWORK_READ_TIMEOUT_MS) { 32 | timedOut = true; 33 | handleTimeout(); 34 | return; 35 | } 36 | } 37 | } 38 | 39 | byte TcpStream::read() { 40 | waitAvailable(1); 41 | if (timedOut) { 42 | return 0; 43 | } 44 | return tcpConnection.read(); 45 | } 46 | 47 | uint16_t TcpStream::read2Bytes() { 48 | waitAvailable(2); 49 | if (timedOut) { 50 | return 0; 51 | } 52 | uint16_t hi = read(); 53 | uint16_t lo = read(); 54 | return (hi << 8) | lo; 55 | } 56 | 57 | uint32_t TcpStream::read4Bytes() { 58 | waitAvailable(4); 59 | if (timedOut) { 60 | return 0; 61 | } 62 | uint32_t b0 = read(); 63 | uint32_t b1 = read(); 64 | uint32_t b2 = read(); 65 | uint32_t b3 = read(); 66 | return (b0 << 24) | (b1 << 16) | (b2 << 8) | b3; 67 | } 68 | 69 | String TcpStream::readStringUntil(char delim) { 70 | if (timedOut) { 71 | return ""; 72 | } 73 | String result = ""; 74 | result.reserve(16); 75 | char c; 76 | while (!timedOut && (c = read()) != delim) { 77 | result += c; 78 | } 79 | return timedOut ? "" : result; 80 | } 81 | 82 | String TcpStream::readString(int len) { 83 | waitAvailable(len); 84 | if (timedOut) { 85 | return ""; 86 | } 87 | String result = ""; 88 | result.reserve(len); 89 | for (int i = 0; i < len; i++) { 90 | result += (char) read(); 91 | } 92 | return result; 93 | } 94 | 95 | bool TcpStream::hasMoreData() { 96 | return !timedOut && tcpConnection.connected(); 97 | } 98 | 99 | bool TcpStream::dataAvailable() { 100 | return !timedOut && tcpConnection.available() > 0; 101 | } 102 | 103 | void TcpStream::write(byte b) { 104 | if (timedOut) { 105 | return; 106 | } 107 | sendBuffer[sendBufferIndex] = b; 108 | sendBufferIndex++; 109 | if (sendBufferIndex == SEND_BUFFER_SIZE) { 110 | flushSendBuffer(); 111 | } 112 | } 113 | 114 | void TcpStream::write2Bytes(uint16_t data) { 115 | write((byte) ((data & 0xFF00) >> 8)); 116 | write((byte) (data & 0x00FF)); 117 | } 118 | 119 | void TcpStream::write4Bytes(uint32_t data) { 120 | write((byte) ((data & 0xFF000000) >> 24)); 121 | write((byte) ((data & 0x00FF0000) >> 16)); 122 | write((byte) ((data & 0x0000FF00) >> 8)); 123 | write((byte) (data & 0x000000FF)); 124 | } 125 | 126 | void TcpStream::print(String s) { 127 | for (int i = 0; i < s.length(); i++) { 128 | write((byte) s[i]); 129 | } 130 | } 131 | 132 | void TcpStream::flushSendBuffer() { 133 | if (!timedOut) { 134 | tcpConnection.write((byte*)sendBuffer, sendBufferIndex); 135 | sendBufferIndex = 0; 136 | } 137 | } 138 | 139 | void TcpStream::handleTimeout() { 140 | Serial.println("Connection timed out!"); 141 | tcpConnection.stop(); 142 | } 143 | 144 | TcpStream::~TcpStream() { 145 | flushSendBuffer(); 146 | Serial.println("Closing connection!"); 147 | tcpConnection.stop(); 148 | } 149 | 150 | -------------------------------------------------------------------------------- /printserver/TcpStream.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include 21 | #include "Settings.h" 22 | 23 | #define SEND_BUFFER_SIZE 1024 24 | 25 | class TcpStream { 26 | private: 27 | WiFiClient tcpConnection; 28 | bool timedOut = false; 29 | byte sendBuffer[SEND_BUFFER_SIZE]; 30 | int sendBufferIndex = 0; 31 | void waitAvailable(int numBytes); 32 | 33 | protected: 34 | virtual void handleTimeout(); 35 | 36 | public: 37 | TcpStream(WiFiClient _tcpConnection); 38 | 39 | virtual bool hasMoreData(); 40 | virtual bool dataAvailable(); 41 | 42 | virtual byte read(); 43 | uint16_t read2Bytes(); 44 | uint32_t read4Bytes(); 45 | String readStringUntil(char delim); 46 | String readString(int length); 47 | 48 | void write(byte b); 49 | void write2Bytes(uint16_t data); 50 | void write4Bytes(uint32_t data); 51 | void print(String s); 52 | void flushSendBuffer(); 53 | 54 | ~TcpStream(); 55 | }; 56 | -------------------------------------------------------------------------------- /printserver/USBPortPrinter.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include "USBPortPrinter.h" 19 | 20 | USBPortPrinter::USBPortPrinter(String _printerId, SoftwareSerial& _ch375stream, int ch375IntPin): Printer(_printerId), ch375stream(_ch375stream), ch375(ch375stream, ch375IntPin), printerPort(ch375), isInitialized(false) { 21 | pinMode(ch375IntPin, INPUT); 22 | } 23 | 24 | bool USBPortPrinter::ensureInitialized() { 25 | if (isInitialized) return true; 26 | if(!ch375.init()) return false; 27 | if(!ch375.setBaudRate(100000, [this](){ch375stream.begin(100000);})) return false; 28 | if(!printerPort.init()) return false; 29 | isInitialized = true; 30 | return true; 31 | } 32 | 33 | void USBPortPrinter::startJob() { 34 | ensureInitialized(); 35 | } 36 | 37 | void USBPortPrinter::endJob() { 38 | printerPort.flush(); 39 | } 40 | 41 | bool USBPortPrinter::canPrint() { 42 | return true; 43 | } 44 | 45 | void USBPortPrinter::printByte(byte b) { 46 | printerPort.write(b); 47 | } 48 | 49 | String USBPortPrinter::getInfo() { 50 | if (!ensureInitialized()) return "USB port printer - initialization failed"; 51 | return "USB port printer, correctly intialized"; 52 | } 53 | -------------------------------------------------------------------------------- /printserver/USBPortPrinter.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include //TODO remove 20 | #include 21 | #include 22 | #include "Printer.h" 23 | 24 | class USBPortPrinter: public Printer { 25 | private: 26 | SoftwareSerial& ch375stream; 27 | CH375 ch375; 28 | CH375USBPrinter printerPort; 29 | bool isInitialized = false; 30 | bool ensureInitialized(); 31 | protected: 32 | void startJob(); 33 | void endJob(); 34 | bool canPrint(); 35 | void printByte(byte b); 36 | public: 37 | USBPortPrinter(String _printerId, SoftwareSerial& ch375stream, int ch375IntPin); 38 | String getInfo(); 39 | }; 40 | -------------------------------------------------------------------------------- /printserver/WiFiManager.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include 19 | #include 20 | #include "WiFiManager.h" 21 | 22 | #define CONNECTION_TIMEOUT_MS 10*1000 23 | 24 | bool WiFiManager::apEnabled = false; 25 | 26 | void WiFiManager::wifi_setup() { 27 | Serial.println("Connecting to WiFi..."); 28 | WiFi.setAutoConnect(true); 29 | unsigned long connectionStarted = millis(); 30 | while(!(WiFi.isConnected() || (millis() - connectionStarted > CONNECTION_TIMEOUT_MS))) { 31 | delay(200); 32 | } 33 | if (WiFi.isConnected()) { 34 | apEnabled = false; 35 | WiFi.setAutoReconnect(true); 36 | Serial.println("WiFi connected"); 37 | } else { 38 | Serial.println("Connection timed out, starting WiFi access point"); 39 | String apSSID = "ESP8266PrintServer" + String(ESP.getChipId()); 40 | if (WiFi.softAP(apSSID.c_str())) { 41 | apEnabled = true; 42 | Serial.println("SoftAP started with SSID " + apSSID); 43 | } else { 44 | Serial.println("Failed to start SoftAP"); 45 | } 46 | } 47 | } 48 | 49 | String WiFiManager::info() { 50 | if (apEnabled) { 51 | return "Access point mode, IP = " + WiFi.softAPIP().toString(); 52 | } else if (WiFi.status() == WL_CONNECTED) { 53 | return "Connected to " + WiFi.SSID() + ", IP = " + WiFi.localIP().toString() + ", signal = " + WiFi.RSSI() + "dBm"; 54 | } else { 55 | return "Offline"; 56 | } 57 | } 58 | 59 | String WiFiManager::getIP() { 60 | if (apEnabled) { 61 | return WiFi.softAPIP().toString(); 62 | } else if (WiFi.status() == WL_CONNECTED) { 63 | return WiFi.localIP().toString(); 64 | } else { 65 | return ""; 66 | } 67 | } 68 | 69 | char* WiFiManager::getEncryptionTypeName(int t) { 70 | //Source: http://arduino-esp8266.readthedocs.io/en/latest/esp8266wifi/scan-class.html#encryptiontype 71 | switch (t) { 72 | case ENC_TYPE_WEP: return "WEP"; 73 | case ENC_TYPE_TKIP: return "WPA/PSK"; 74 | case ENC_TYPE_CCMP: return "WPA2/PSK"; 75 | case ENC_TYPE_NONE: return "Open network"; 76 | case ENC_TYPE_AUTO: return "WPA/WPA2/PSK"; 77 | default: return "Unknown"; 78 | } 79 | } 80 | 81 | void WiFiManager::getAvailableNetworks(std::function forEachNet) { 82 | int count = WiFi.scanNetworks(); 83 | for (int i = 0; i < count; i++) { 84 | forEachNet(WiFi.SSID(i), WiFi.encryptionType(i), WiFi.RSSI(i)); 85 | } 86 | WiFi.scanDelete(); 87 | } 88 | 89 | void WiFiManager::connectTo(String ssid, String password) { 90 | if (apEnabled) { 91 | WiFi.softAPdisconnect(true); 92 | apEnabled = false; 93 | } 94 | Serial.printf("Connecting to %s\r\n", ssid.c_str()); 95 | WiFi.begin(ssid.c_str(), password.c_str()); 96 | wifi_setup(); 97 | } 98 | -------------------------------------------------------------------------------- /printserver/WiFiManager.h: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #pragma once 19 | #include 20 | #include 21 | 22 | class WiFiManager { 23 | private: 24 | static bool apEnabled; 25 | public: 26 | static void wifi_setup(); 27 | static String info(); 28 | static String getIP(); 29 | static char* getEncryptionTypeName(int i); 30 | static void getAvailableNetworks(std::function forEachNet); 31 | static void connectTo(String ssid, String password); 32 | }; 33 | -------------------------------------------------------------------------------- /printserver/printserver.ino: -------------------------------------------------------------------------------- 1 | /* 2 | This file is part of printserver-esp8266. 3 | 4 | printserver-esp8266 is free software: you can redistribute it and/or modify 5 | it under the terms of the GNU General Public License as published by 6 | the Free Software Foundation, either version 3 of the License, or 7 | (at your option) any later version. 8 | 9 | printserver-esp8266 is distributed in the hope that it will be useful, 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 | GNU General Public License for more details. 13 | 14 | You should have received a copy of the GNU General Public License 15 | along with printserver-esp8266. If not, see . 16 | */ 17 | 18 | #include 19 | #include 20 | #include 21 | #include 22 | #include 23 | 24 | #include "WiFiManager.h" 25 | #include "TcpPrintServer.h" 26 | #include "DirectParallelPortPrinter.h" 27 | #include "ShiftRegParallelPortPrinter.h" 28 | #include "SerialPortPrinter.h" 29 | #include "USBPortPrinter.h" 30 | #include "PrintQueue.h" 31 | 32 | /*#define STROBE 10 33 | #define BUSY 9 34 | int DATA[8] = {D0, D1, D2, D3, D4, D5, D6, D7}; 35 | DirectParallelPortPrinter printer("lpt1", DATA, STROBE, BUSY);*/ 36 | 37 | /*#define LPT_DATA D2 38 | #define LPT_LATCH D3 39 | #define LPT_CLK D4 40 | #define LPT_BUSY D5 41 | #define LPT_STROBE D6 42 | ShiftRegParallelPortPrinter printer1("parallel", LPT_DATA, LPT_CLK, LPT_LATCH, LPT_STROBE, LPT_BUSY);*/ 43 | 44 | #define CH375_TX D3 45 | #define CH375_RX D6 46 | #define CH375_INT D4 47 | SoftwareSerial ch375swSer(CH375_RX, CH375_TX, false, 32); 48 | USBPortPrinter printer1("usb", ch375swSer, CH375_INT); 49 | 50 | SerialPortPrinter printer2("serial", &Serial); 51 | Printer* printers[] = {&printer1, &printer2}; 52 | 53 | #define PRINTER_COUNT (sizeof(printers) / sizeof(printers[0])) 54 | TcpPrintServer server(printers, PRINTER_COUNT); 55 | 56 | void setup() { 57 | Serial.begin(115200); 58 | ch375swSer.begin(9600); //TODO: probably remove, should be handled by library or by the USBPortPrinter class 59 | Serial.println("boot ok"); 60 | SPIFFS.begin(); 61 | for (unsigned int i = 0; i < PRINTER_COUNT; i++) { 62 | printers[i]->init(); 63 | } 64 | Serial.println("initialized printers"); 65 | WiFiManager::wifi_setup(); 66 | server.start(); 67 | Serial.println("setup ok"); 68 | } 69 | 70 | void loop() { 71 | printDebugAndYield(); 72 | server.process(); 73 | for (unsigned int i = 0; i < PRINTER_COUNT; i++) { 74 | printers[i]->processQueue(); 75 | } 76 | } 77 | 78 | inline void printDebugAndYield() { 79 | static unsigned long lastCall = 0; 80 | if (millis() - lastCall > 5000) { 81 | Serial.printf("Free heap: %d bytes\r\n", ESP.getFreeHeap()); 82 | Serial.println(WiFiManager::info()); 83 | server.printInfo(); 84 | FSInfo fsinfo; 85 | SPIFFS.info(fsinfo); 86 | Serial.printf("[Filesystem] Total bytes: %d, Used bytes: %d, Max open files: %d\r\n", fsinfo.totalBytes, fsinfo.usedBytes, fsinfo.maxOpenFiles); 87 | 88 | PrintQueue::updateAvailableFlashSpace(); 89 | yield(); 90 | 91 | lastCall = millis(); 92 | } 93 | } 94 | --------------------------------------------------------------------------------