├── Distance Measurement RTX-MID-868.xlsx ├── LICENSE ├── PwmTransceiver.cpp ├── PwmTransceiver.h ├── README.md ├── examples ├── Advanced_RX │ └── Advanced_RX.ino ├── Advanced_TX │ └── Advanced_TX.ino ├── LoopTransmitter │ └── LoopTransmitter.ino ├── Receiver │ └── Receiver.ino ├── Transceiver │ └── Transceiver.ino ├── Transmit_and_power_down │ └── Transmit_and_power_down.ino └── Transmitter │ └── Transmitter.ino ├── keywords.txt └── library.properties /Distance Measurement RTX-MID-868.xlsx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/vittorioexp/J1850-Arduino-Transceiver-Library/c9c45711c998a7131b01d8dcc912662eb08449c0/Distance Measurement RTX-MID-868.xlsx -------------------------------------------------------------------------------- /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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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 | {project} Copyright (C) {year} {fullname} 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 | -------------------------------------------------------------------------------- /PwmTransceiver.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-PWM-Transceiver-Library 6 | */ 7 | 8 | #include 9 | 10 | volatile uint8_t _TX_PIN; 11 | volatile uint8_t _RX_PIN; 12 | volatile uint8_t _EN_PIN; 13 | volatile uint8_t _MODE_PIN; 14 | volatile uint32_t _BITRATE; 15 | volatile uint32_t _BIT_TIME; 16 | volatile uint32_t _HALF_BIT_TIME; 17 | volatile uint32_t _ONE_THIRD_BIT_TIME; 18 | volatile uint32_t _TWO_THIRD_BIT_TIME; 19 | volatile bool _high_speed = false; 20 | volatile char _RX_BUFFER[BUFFER_SIZE]; 21 | volatile uint16_t _BUFFER_INDEX = 0; 22 | volatile uint32_t _timeOut = 500; // uS 23 | volatile unsigned long timeOldMicros; 24 | volatile unsigned long timeOldMillis = 0; 25 | volatile int _count = 7; 26 | volatile char _rx_char = 0x00; 27 | volatile bool _logic = true; // 1: Direct; 0: Inverse 28 | 29 | void isrPwmDecoder() 30 | { 31 | if (digitalReadFast(_RX_PIN)==_logic) 32 | { 33 | timeOldMicros = micros(); 34 | timeOldMillis = millis(); 35 | } 36 | else 37 | { 38 | bool bit = micros() > timeOldMicros + _HALF_BIT_TIME; 39 | _rx_char ^= (-bit ^ _rx_char) & (1 << _count); 40 | //Serial.print(bit); 41 | if (_count > 0) _count--; 42 | else { 43 | _count = 7; 44 | _RX_BUFFER[_BUFFER_INDEX] = _rx_char; 45 | _BUFFER_INDEX++; 46 | _rx_char = 0x00; 47 | } 48 | } 49 | } 50 | 51 | /* 52 | void isrPwmDecoder() 53 | { 54 | timeOldMicros = micros(); 55 | while (digitalReadFast(_RX_PIN) == _logic); 56 | bool bit = (micros() - timeOldMicros) > _HALF_BIT_TIME; 57 | _rx_char ^= (-bit ^ _rx_char) & (1 << _count); 58 | if (_count > 0) _count--; 59 | else { 60 | _count = 7; 61 | _RX_BUFFER[_BUFFER_INDEX] = _rx_char; 62 | _BUFFER_INDEX++; 63 | _rx_char = 0x00; 64 | } 65 | timeOldMillis = millis(); 66 | } 67 | */ 68 | PwmTransceiver::PwmTransceiver(uint8_t RX_PIN, uint8_t TX_PIN) 69 | { 70 | _RX_PIN = RX_PIN; 71 | pinModeFast(_RX_PIN, INPUT); 72 | _TX_PIN = TX_PIN; 73 | pinModeFast(_TX_PIN, OUTPUT); 74 | } 75 | 76 | PwmTransceiver::PwmTransceiver(uint8_t RX_PIN, uint8_t TX_PIN, uint8_t MODE_PIN, uint8_t EN_PIN) 77 | { 78 | _RX_PIN = RX_PIN; 79 | pinModeFast(_RX_PIN, INPUT); 80 | _TX_PIN = TX_PIN; 81 | pinModeFast(_TX_PIN, OUTPUT); 82 | _MODE_PIN = MODE_PIN; 83 | pinModeFast(_MODE_PIN, OUTPUT); 84 | _EN_PIN = EN_PIN; 85 | pinModeFast(_EN_PIN, OUTPUT); 86 | } 87 | 88 | void PwmTransceiver::setRxPin(uint8_t RX_PIN) 89 | { 90 | _RX_PIN = RX_PIN; 91 | pinModeFast(_RX_PIN, INPUT); 92 | } 93 | 94 | void PwmTransceiver::setTxPin(uint8_t TX_PIN) 95 | { 96 | _TX_PIN = TX_PIN; 97 | pinModeFast(_TX_PIN, OUTPUT); 98 | } 99 | 100 | void PwmTransceiver::setEnablePin(uint8_t EN_PIN) 101 | { 102 | _EN_PIN = EN_PIN; 103 | pinModeFast(_EN_PIN, OUTPUT); 104 | } 105 | 106 | void PwmTransceiver::setTxRxModePin(uint8_t MODE_PIN) 107 | { 108 | _MODE_PIN = MODE_PIN; 109 | pinModeFast(_MODE_PIN, OUTPUT); 110 | } 111 | 112 | void PwmTransceiver::setLogic(bool logic) 113 | { 114 | _logic = logic; 115 | } 116 | 117 | uint8_t PwmTransceiver::getRxPin() 118 | { 119 | return _RX_PIN; 120 | } 121 | 122 | uint8_t PwmTransceiver::getTxPin() 123 | { 124 | return _TX_PIN; 125 | } 126 | 127 | void PwmTransceiver::begin(uint32_t BITRATE) 128 | { 129 | _BITRATE = BITRATE; 130 | if (_BITRATE > 15) { 131 | // Use microseconds 132 | _BIT_TIME = 1000000 / _BITRATE; // uS 133 | _high_speed = true; 134 | } else { 135 | // Use milliseconds 136 | _BIT_TIME = 1000 / _BITRATE; // mS 137 | _high_speed = false; 138 | } 139 | _HALF_BIT_TIME = _BIT_TIME / 2; 140 | _ONE_THIRD_BIT_TIME = _BIT_TIME / 3; 141 | _TWO_THIRD_BIT_TIME = _BIT_TIME * 2 / 3; 142 | enableInterrupt(_RX_PIN, isrPwmDecoder, CHANGE); 143 | //if (_logic) enableInterrupt(_RX_PIN, isrPwmDecoder, RISING); 144 | //else enableInterrupt(_RX_PIN, isrPwmDecoder, FALLING); 145 | } 146 | 147 | void PwmTransceiver::powerDown() 148 | { 149 | digitalWriteFast(_EN_PIN, LOW); 150 | delay(15); 151 | } 152 | 153 | void PwmTransceiver::powerUp() 154 | { 155 | digitalWriteFast(_EN_PIN, HIGH); 156 | delay(15); 157 | } 158 | 159 | void PwmTransceiver::enableTxMode() 160 | { 161 | digitalWriteFast(_MODE_PIN, HIGH); 162 | delayMicroseconds(500); 163 | } 164 | 165 | void PwmTransceiver::enableRxMode() 166 | { 167 | digitalWriteFast(_MODE_PIN, LOW); 168 | delayMicroseconds(500); 169 | } 170 | 171 | void PwmTransceiver::println(String str) 172 | { 173 | str += '\n'; 174 | print(str); 175 | } 176 | 177 | void PwmTransceiver::print(String str) 178 | { 179 | uint16_t size = str.length() + 1; 180 | char txt[size]; 181 | str.toCharArray(txt, size); 182 | uint16_t i; 183 | for (i = 0; i < size - 1; i++) 184 | { 185 | PwmTransceiver::print(txt[i]); 186 | } 187 | } 188 | 189 | void PwmTransceiver::print(char txt[]) 190 | { 191 | uint16_t size = strlen(txt); 192 | uint16_t i; 193 | for (i = 0; i < size; i++) 194 | { 195 | PwmTransceiver::print(txt[i]); 196 | } 197 | } 198 | 199 | void PwmTransceiver::print(char c) 200 | { 201 | int i; 202 | for (i = 7; i >= 0; i--) 203 | { 204 | PwmTransceiver::send((c >> i) % 2); 205 | } 206 | } 207 | 208 | void PwmTransceiver::print(uint8_t n) 209 | { 210 | int i; 211 | for (i = 7; i >= 0; i--) 212 | { 213 | PwmTransceiver::send((n >> i) % 2); 214 | } 215 | } 216 | 217 | void PwmTransceiver::send(bool b) 218 | { 219 | if (!_logic) b = !b; 220 | if (_high_speed) 221 | { 222 | if (b) 223 | { 224 | /* Send 66% HIGH, 33% LOW */ 225 | digitalWriteFast(_TX_PIN, HIGH); 226 | delayMicroseconds(_TWO_THIRD_BIT_TIME); 227 | digitalWriteFast(_TX_PIN, LOW); 228 | delayMicroseconds(_ONE_THIRD_BIT_TIME); 229 | } 230 | else 231 | { 232 | /* Send 33% HIGH, 66% LOW */ 233 | digitalWriteFast(_TX_PIN, HIGH); 234 | delayMicroseconds(_ONE_THIRD_BIT_TIME); 235 | digitalWriteFast(_TX_PIN, LOW); 236 | delayMicroseconds(_TWO_THIRD_BIT_TIME); 237 | } 238 | } 239 | else 240 | { 241 | if (b) 242 | { 243 | /* Send 66% HIGH, 33% LOW */ 244 | digitalWriteFast(_TX_PIN, HIGH); 245 | delay(_TWO_THIRD_BIT_TIME); 246 | digitalWriteFast(_TX_PIN, LOW); 247 | delay(_ONE_THIRD_BIT_TIME); 248 | } 249 | else 250 | { 251 | /* Send 33% HIGH, 66% LOW */ 252 | digitalWriteFast(_TX_PIN, HIGH); 253 | delay(_ONE_THIRD_BIT_TIME); 254 | digitalWriteFast(_TX_PIN, LOW); 255 | delay(_TWO_THIRD_BIT_TIME); 256 | } 257 | } 258 | } 259 | 260 | bool PwmTransceiver::isReceiving() 261 | { 262 | if (_BUFFER_INDEX > BUFFER_SIZE - 1) 263 | { 264 | // Buffer full 265 | _BUFFER_INDEX = BUFFER_SIZE - 1; 266 | return false; 267 | } 268 | 269 | // Check the lost of synchronicity 270 | 271 | if (millis() > timeOldMillis + _timeOut) 272 | { 273 | _rx_char = 0x00; 274 | _count = 7; 275 | return false; 276 | } 277 | 278 | return true; 279 | } 280 | 281 | bool PwmTransceiver::available() 282 | { 283 | return (_BUFFER_INDEX > 0); 284 | } 285 | 286 | String PwmTransceiver::readString() 287 | { 288 | String str = ""; 289 | int i; 290 | for (i=0; i<_BUFFER_INDEX; i++) 291 | { 292 | str += _RX_BUFFER[i]; 293 | _RX_BUFFER[i] = 0x00; 294 | } 295 | _BUFFER_INDEX = 0; 296 | return str; 297 | } 298 | 299 | byte PwmTransceiver::CRC8(String str) 300 | { 301 | byte size = str.length() + 1; 302 | char txt[size]; 303 | str.toCharArray(txt, size); 304 | return CRC8(txt, size - 1); 305 | } 306 | 307 | byte PwmTransceiver::CRC8(byte data[], byte len) 308 | { 309 | byte crc = 0x00; 310 | while (len--) { 311 | byte extract = *data++; 312 | for (byte tempI = 8; tempI; tempI--) { 313 | byte sum = (crc ^ extract) & 0x01; 314 | crc >>= 1; 315 | if (sum) { 316 | crc ^= 0x8C; 317 | } 318 | extract >>= 1; 319 | } 320 | } 321 | return crc; 322 | } 323 | -------------------------------------------------------------------------------- /PwmTransceiver.h: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | 8 | #define LIBCALL_ENABLEINTERRUPT 9 | #define EI_ARDUINO_INTERRUPTED_PIN 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include 16 | #define BUFFER_SIZE 64 17 | 18 | class PwmTransceiver 19 | { 20 | 21 | public: 22 | PwmTransceiver(uint8_t RX_PIN, uint8_t TX_PIN); 23 | PwmTransceiver(uint8_t RX_PIN, uint8_t TX_PIN, uint8_t MODE_PIN, uint8_t EN_PIN); 24 | void setRxPin(uint8_t RX_PIN); 25 | void setTxPin(uint8_t TX_PIN); 26 | void setEnablePin(uint8_t EN_PIN); 27 | void setTxRxModePin(uint8_t MODE_PIN); 28 | void setLogic(bool logic); 29 | uint8_t getRxPin(); 30 | uint8_t getTxPin(); 31 | 32 | void begin(uint32_t BITRATE); 33 | void powerDown(); 34 | void powerUp(); 35 | void enableTxMode(); 36 | void enableRxMode(); 37 | 38 | void println(String str); 39 | void print(String str); 40 | void print(char txt[]); 41 | void print(char c); 42 | void print(uint8_t n); 43 | void send (bool b); 44 | 45 | bool isReceiving(); 46 | bool available(); 47 | String readString(); 48 | 49 | byte CRC8(String str); 50 | byte CRC8(byte data[], byte len); 51 | 52 | }; 53 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # J1850-Arduino-Transceiver-Library 2 | Arduino library which allow to decode characters on J1850-PWM mode. 3 | It works with wire, radio and laser transmissions. 4 | You just have to choose your bit-rate (lower is better), tx and rx pins. 5 | It doesn't have either a header nor a parity check. These functions could be implemented at a higher protocol layer. It doesn't detect SOF (start of frame) and EOF (end of frame) yet. 6 | 7 | Required libraries: 8 | 1. DigitalWriteFast (Tested with version 1.0.0, Download: https://github.com/watterott/Arduino-Libs) 9 | 2. EnableInterrupt (Tested with version 0.9.5, Download: https://github.com/GreyGnome/EnableInterrupt) 10 | 11 | This library has been tested with: 12 | 1. Wire connection between two Arduino 13 | 2. Radio connection (multipoint) with FSK modulation (and OOK too), module RTX-MID-868. Datasheet: https://goo.gl/UEv8ii 14 | 3. Laser connection (experimental circuit) 15 | 16 | ## 1. Wire connection between two Arduino (DEFAULT) 17 | Arduino Uno (TRX) | Arduino Uno (TRX) | Notes 18 | -------------|-------------|------------ 19 | 13 | 3 | Intelligent signal Tx 20 | 3 | 13 | Intelligent signal Rx 21 | GND | GND | Common GND 22 | 23 | ## 2. Radio connection with RTX-MID-868 (DEFAULT) 24 | Arduino Uno (TX) | RTX-MID-868 module | Notes 25 | -------------|-------------|------------ 26 | 13 | 4 | Intelligent signal Tx 27 | 12 | 5 | Enable TX/RX 28 | 11 | 6 | Power Up/Down 29 | 3 | 9 | Intelligent signal Rx 30 | +5V | 10 | +2,5V ÷ +6V 31 | GND | 2, 7 | Common GND 32 | 33 | #### Remember: 34 | In order to keep the transmission medium free (ether) after transmission, it is recommended to use the "setTxRxModePin" method (see example sketch "Advanced_TX"). The "mode_pin" is connected to the radio module and is used to choose the transmission directions (to select transmission or reception, see datasheet of RTX-MID-868 module https://goo.gl/UEv8ii). 35 | -------------------------------------------------------------------------------- /examples/Advanced_RX/Advanced_RX.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | 14 | PwmTransceiver Transceiver(rx_pin, tx_pin); 15 | 16 | void setup() { 17 | Serial.begin(2000000); 18 | Serial.println("PwmTransceiver"); 19 | Transceiver.begin(1200); 20 | } 21 | 22 | void loop() { 23 | while (Transceiver.isReceiving()); 24 | if (Transceiver.available()) { 25 | String str = Transceiver.readString(); 26 | if (str.indexOf("##") != (-1) && str.indexOf(";;") != (-1)) { 27 | uint8_t indexOne = str.indexOf("##"); 28 | uint8_t indexTwo = str.indexOf(";;"); 29 | String msg = str.substring(indexOne + 2, indexTwo); 30 | Serial.println(msg); 31 | } 32 | } 33 | } 34 | -------------------------------------------------------------------------------- /examples/Advanced_TX/Advanced_TX.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | 14 | String str; 15 | const int mode_pin = 12; 16 | uint16_t count = 0; 17 | uint8_t num = random(10, 20); 18 | 19 | PwmTransceiver Transceiver(rx_pin, tx_pin); 20 | 21 | void setup() { 22 | Serial.begin(9600); 23 | Serial.println("Transmitter"); 24 | Transceiver.begin(1200); // 1200 bit per second 25 | Transceiver.setTxRxModePin(mode_pin); 26 | Transceiver.enableRxMode(); 27 | } 28 | 29 | void loop() { 30 | 31 | delay(500 * num); 32 | 33 | // Alternative way: send a string 34 | Transceiver.enableTxMode(); // Enable TX 35 | delay(800); // Load serial buffer 36 | str = "## "; 37 | str += String(count++); 38 | str += ". Message from Arduino n.1 ;;"; 39 | Transceiver.println(str); 40 | Serial.println(str); 41 | delay(800); 42 | Transceiver.enableRxMode(); // Disable TX (free the channel) 43 | 44 | 45 | } 46 | -------------------------------------------------------------------------------- /examples/LoopTransmitter/LoopTransmitter.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | 14 | PwmTransceiver Transceiver(rx_pin, tx_pin); 15 | 16 | void setup() { 17 | Serial.begin(2000000); 18 | Serial.println("PwmTransceiver - LoopTransmitter"); 19 | //Transceiver.setLogic(false); // Inverse logic 20 | Transceiver.begin(1200); // Bits per second 21 | delay(5000); // Receiver needs to prepare 22 | } 23 | 24 | void loop() { 25 | String str = "Hello, world!"; 26 | str += Transceiver.CRC8(str); 27 | Serial.println(str); 28 | Transceiver.print(str); 29 | delay(2000); 30 | } 31 | -------------------------------------------------------------------------------- /examples/Receiver/Receiver.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | 14 | PwmTransceiver Transceiver(rx_pin, tx_pin); 15 | 16 | void setup() { 17 | Serial.begin(2000000); 18 | pinMode(rx_pin, INPUT_PULLUP); 19 | Serial.println("PwmTransceiver - Receiver"); 20 | Transceiver.begin(1200); // Bits per second 21 | } 22 | 23 | void loop() { 24 | while (1) 25 | { 26 | while (Transceiver.isReceiving()); 27 | if (Transceiver.available()) 28 | { 29 | Serial.println(Transceiver.readString()); 30 | } 31 | // Put non-blocking code here 32 | } 33 | } 34 | -------------------------------------------------------------------------------- /examples/Transceiver/Transceiver.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | 14 | PwmTransceiver Transceiver(rx_pin, tx_pin); 15 | 16 | void setup() { 17 | Serial.begin(2000000); 18 | Serial.println("PwmTransceiver"); 19 | Transceiver.begin(1200); 20 | } 21 | 22 | void loop() { 23 | while (Transceiver.isReceiving()); 24 | if (Transceiver.available()) { 25 | Serial.print(Transceiver.readString()); 26 | } 27 | if (Serial.available()) { 28 | Transceiver.print(Serial.readString()); 29 | } 30 | // Put non-blocking code here 31 | } 32 | -------------------------------------------------------------------------------- /examples/Transmit_and_power_down/Transmit_and_power_down.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | const int en_pin = 11; // To power up/down the module 14 | 15 | PwmTransceiver Transceiver(rx_pin, tx_pin); 16 | 17 | String str; 18 | 19 | void setup() { 20 | Serial.begin(2000000); 21 | Serial.println("PwmTransceiver"); 22 | Transceiver.begin(1200); // 1200 bit per second 23 | Transceiver.setEnablePin(en_pin); // Set power up/down pin 24 | Transceiver.powerDown(); // Power down module 25 | } 26 | 27 | void loop() { 28 | 29 | // Send a string 30 | if (Serial.available() > 0) { 31 | Transceiver.powerUp(); // Power up module 32 | delay(1000); // Radio-module is powering up 33 | str = Serial.readString(); // One second timeOut 34 | Transceiver.print(str); 35 | Serial.println(str); 36 | delay(1000); 37 | Transceiver.powerDown(); // Power down module 38 | } 39 | 40 | } 41 | -------------------------------------------------------------------------------- /examples/Transmitter/Transmitter.ino: -------------------------------------------------------------------------------- 1 | /* 2 | Created by: Esposito Vittorio 3 | GitHub: https://github.com/VittorioEsposito 4 | 5 | J1850-Arduino-Transceiver-Library 6 | */ 7 | #define EI_ARDUINO_INTERRUPTED_PIN 8 | #include 9 | #include 10 | 11 | const int rx_pin = 3; // https://goo.gl/nHC95v 12 | const int tx_pin = 13; 13 | 14 | PwmTransceiver Transceiver(rx_pin, tx_pin); 15 | 16 | void setup() { 17 | Serial.begin(2000000); 18 | Serial.println("PwmTransceiver - LoopTransmitter"); 19 | //Transceiver.setLogic(false); // Inverse logic 20 | Transceiver.begin(1200); // Bits per second 21 | delay(5000); // Receiver needs to prepare 22 | } 23 | 24 | void loop() { 25 | if (Serial.available()) { 26 | Transceiver.print(Serial.readString()); 27 | } 28 | } 29 | -------------------------------------------------------------------------------- /keywords.txt: -------------------------------------------------------------------------------- 1 | ####################################### 2 | # Syntax Coloring Map For J1850-Arduino-Transceiver-Library 3 | ####################################### 4 | 5 | ####################################### 6 | # Datatypes (KEYWORD1) 7 | ####################################### 8 | 9 | Decoder KEYWORD1 10 | Encoder KEYWORD1 11 | Transceiver KEYWORD1 12 | PwmDecoder KEYWORD1 13 | PwmEncoder KEYWORD1 14 | PwmTransceiver KEYWORD1 15 | 16 | ####################################### 17 | # Methods and Functions (KEYWORD2) 18 | ####################################### 19 | 20 | setRxPin KEYWORD2 21 | getRxPin KEYWORD2 22 | begin KEYWORD2 23 | isrPwmDecoder KEYWORD2 24 | receive KEYWORD2 25 | isReceiving KEYWORD2 26 | available KEYWORD2 27 | readString KEYWORD2 28 | flagDecoder KEYWORD2 29 | timeOld KEYWORD2 30 | setTxPin KEYWORD2 31 | setEnablePin KEYWORD2 32 | setTxRxModePin KEYWORD2 33 | getTxPin KEYWORD2 34 | powerDown KEYWORD2 35 | powerUp KEYWORD2 36 | enableTxMode KEYWORD2 37 | enableRxMode KEYWORD2 38 | println KEYWORD2 39 | print KEYWORD2 40 | send KEYWORD2 41 | setLogic KEYWORD2 42 | CRC8 KEYWORD2 43 | -------------------------------------------------------------------------------- /library.properties: -------------------------------------------------------------------------------- 1 | name=J1850 Arduino Transceiver Library 2 | version=1.3.1 3 | author=Vittorio Esposito 4 | maintainer=Vittorio Esposito 5 | sentence=Arduino library for J1850-Arduino-Transceiver 6 | paragraph=Arduino library for J1850-Arduino-Transceiver 7 | category=Communication 8 | url=https://github.com/vittorioexp/J1850-Arduino-Transceiver-Library 9 | architectures=* 10 | depends=EnableInterrupt 11 | --------------------------------------------------------------------------------