├── .gitignore ├── .pio └── build │ └── project.checksum ├── .vscode ├── c_cpp_properties.json ├── extensions.json └── launch.json ├── LICENSE ├── README.md ├── drawings ├── Abstandshalter.pdf ├── Boden-Decke.pdf ├── Front.pdf ├── Rueckwand.pdf ├── Seitenwand.pdf ├── Zusammenbau.pdf ├── Zwischenboden.pdf └── Zwischenwand.pdf ├── include └── README ├── lib └── README ├── platformio.ini ├── schematic ├── AEVOC-Schaltung.fzz ├── Verdrahtung-Fritzing.png └── schaltplan.pdf ├── src ├── configHelpers.cpp ├── configHelpers.h ├── conversionHelpers.cpp ├── conversionHelpers.h ├── debugLogger.cpp ├── debugLogger.h ├── i2cHelpers.cpp ├── i2cHelpers.h ├── main.cpp ├── mqtt.cpp ├── mqtt.h ├── neopixelMatrix.cpp ├── neopixelMatrix.h ├── oledFunctions.cpp ├── oledFunctions.h ├── webHandlers.cpp └── webHandlers.h └── test └── README /.gitignore: -------------------------------------------------------------------------------- 1 | # Prerequisites 2 | *.d 3 | 4 | # Compiled Object files 5 | *.slo 6 | *.lo 7 | *.o 8 | *.obj 9 | 10 | # Precompiled Headers 11 | *.gch 12 | *.pch 13 | 14 | # Compiled Dynamic libraries 15 | *.so 16 | *.dylib 17 | *.dll 18 | 19 | # Fortran module files 20 | *.mod 21 | *.smod 22 | 23 | # Compiled Static libraries 24 | *.lai 25 | *.la 26 | *.a 27 | *.lib 28 | 29 | # Executables 30 | *.exe 31 | *.out 32 | *.app 33 | -------------------------------------------------------------------------------- /.pio/build/project.checksum: -------------------------------------------------------------------------------- 1 | 0b843abf6210f5e6575c95906bc32e6f82245ded -------------------------------------------------------------------------------- /.vscode/c_cpp_properties.json: -------------------------------------------------------------------------------- 1 | // 2 | // !!! 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AUTO-GENERATED FILE! 3 | // PLEASE DO NOT MODIFY IT AND USE "platformio.ini": 4 | // https://docs.platformio.org/page/projectconf/section_env_build.html#build-flags 5 | // 6 | { 7 | "configurations": [ 8 | { 9 | "name": "PlatformIO", 10 | "includePath": [ 11 | "/home/pina/Code/PM2.5-CO2-Watcher/include", 12 | "/home/pina/Code/PM2.5-CO2-Watcher/src", 13 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/IotWebConf/src", 14 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266mDNS/src", 15 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/EEPROM", 16 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266HTTPUpdateServer/src", 17 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WebServer/src", 18 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/DNSServer/src", 19 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFi/src", 20 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/PubSubClient/src", 21 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit SSD1306", 22 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit GFX Library", 23 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit BusIO", 24 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SPI", 25 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit NeoPixel", 26 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/DHT sensor library", 27 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit Unified Sensor", 28 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/SparkFun CCS811 Arduino Library/src", 29 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Nova Fitness Sds dust sensors library/src", 30 | 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"/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFiMesh/src", 53 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266httpUpdate/src", 54 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Ethernet/src", 55 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/GDBStub/src", 56 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Hash/src", 57 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/LittleFS/src", 58 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SD/src", 59 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SDFS/src", 60 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SPISlave/src", 61 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Servo/src", 62 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/TFT_Touch_Shield_V2", 63 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Ticker/src", 64 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/esp8266/src", 65 | "/home/pina/.platformio/packages/tool-unity", 66 | "" 67 | ], 68 | "browse": { 69 | "limitSymbolsToIncludedHeaders": true, 70 | "path": [ 71 | "/home/pina/Code/PM2.5-CO2-Watcher/include", 72 | "/home/pina/Code/PM2.5-CO2-Watcher/src", 73 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/IotWebConf/src", 74 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266mDNS/src", 75 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/EEPROM", 76 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266HTTPUpdateServer/src", 77 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WebServer/src", 78 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/DNSServer/src", 79 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFi/src", 80 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/PubSubClient/src", 81 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit SSD1306", 82 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit GFX Library", 83 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit BusIO", 84 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SPI", 85 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit NeoPixel", 86 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/DHT sensor library", 87 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit Unified Sensor", 88 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/SparkFun CCS811 Arduino Library/src", 89 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Nova Fitness Sds dust sensors library/src", 90 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SoftwareSerial/src", 91 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Wire", 92 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/tools/sdk/include", 93 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/tools/sdk/libc/xtensa-lx106-elf/include", 94 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/cores/esp8266", 95 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/tools/sdk/lwip2/include", 96 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/variants/nodemcu", 97 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/Adafruit CCS811 Library", 98 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/AsyncDelay/src", 99 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/FastLED", 100 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/LiquidCrystal_I2C", 101 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/LiquidCrystal_PCF8574/src", 102 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/SoftWire/src", 103 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/SoftwareSerial", 104 | "/home/pina/Code/PM2.5-CO2-Watcher/.pio/libdeps/nodemcuv2/WifiManager", 105 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ArduinoOTA", 106 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266AVRISP/src", 107 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266HTTPClient/src", 108 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266LLMNR", 109 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266NetBIOS", 110 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266SSDP", 111 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266SdFat/src", 112 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266WiFiMesh/src", 113 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/ESP8266httpUpdate/src", 114 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Ethernet/src", 115 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/GDBStub/src", 116 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Hash/src", 117 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/LittleFS/src", 118 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SD/src", 119 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SDFS/src", 120 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/SPISlave/src", 121 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Servo/src", 122 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/TFT_Touch_Shield_V2", 123 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/Ticker/src", 124 | "/home/pina/.platformio/packages/framework-arduinoespressif8266/libraries/esp8266/src", 125 | "/home/pina/.platformio/packages/tool-unity", 126 | "" 127 | ] 128 | }, 129 | "defines": [ 130 | "PLATFORMIO=50004", 131 | "ESP8266", 132 | "ARDUINO_ARCH_ESP8266", 133 | "ARDUINO_ESP8266_NODEMCU", 134 | "F_CPU=80000000L", 135 | "__ets__", 136 | "ICACHE_FLASH", 137 | "ARDUINO=10805", 138 | "ARDUINO_BOARD=\"PLATFORMIO_NODEMCUV2\"", 139 | "FLASHMODE_DIO", 140 | "LWIP_OPEN_SRC", 141 | "NONOSDK22x_190703=1", 142 | "TCP_MSS=536", 143 | "LWIP_FEATURES=1", 144 | "LWIP_IPV6=0", 145 | "VTABLES_IN_FLASH", 146 | "__PLATFORMIO_BUILD_DEBUG__", 147 | "" 148 | ], 149 | "cStandard": "c99", 150 | "cppStandard": "c++11", 151 | "compilerPath": "/home/pina/.platformio/packages/toolchain-xtensa/bin/xtensa-lx106-elf-gcc", 152 | "compilerArgs": [ 153 | "-mlongcalls", 154 | "-mtext-section-literals", 155 | "" 156 | ] 157 | } 158 | ], 159 | "version": 4 160 | } 161 | -------------------------------------------------------------------------------- /.vscode/extensions.json: -------------------------------------------------------------------------------- 1 | { 2 | // See http://go.microsoft.com/fwlink/?LinkId=827846 3 | // for the documentation about the extensions.json format 4 | "recommendations": [ 5 | "platformio.platformio-ide" 6 | ] 7 | } 8 | -------------------------------------------------------------------------------- /.vscode/launch.json: -------------------------------------------------------------------------------- 1 | // AUTOMATICALLY GENERATED FILE. PLEASE DO NOT MODIFY IT MANUALLY 2 | 3 | // PIO Unified Debugger 4 | // 5 | // Documentation: https://docs.platformio.org/page/plus/debugging.html 6 | // Configuration: https://docs.platformio.org/page/projectconf/section_env_debug.html 7 | 8 | { 9 | "version": "0.2.0", 10 | "configurations": [ 11 | { 12 | "type": "platformio-debug", 13 | "request": "launch", 14 | "name": "PIO Debug", 15 | "executable": "/home/pina/Code/PM2.5-CO2-Watcher/.pio/build/nodemcuv2/firmware.elf", 16 | "projectEnvName": "nodemcuv2", 17 | "toolchainBinDir": "/home/pina/.platformio/packages/toolchain-xtensa/bin", 18 | "preLaunchTask": { 19 | "type": "PlatformIO", 20 | "task": "Pre-Debug" 21 | }, 22 | "internalConsoleOptions": "openOnSessionStart" 23 | }, 24 | { 25 | "type": "platformio-debug", 26 | "request": "launch", 27 | "name": "PIO Debug (skip Pre-Debug)", 28 | "executable": "/home/pina/Code/PM2.5-CO2-Watcher/.pio/build/nodemcuv2/firmware.elf", 29 | "projectEnvName": "nodemcuv2", 30 | "toolchainBinDir": "/home/pina/.platformio/packages/toolchain-xtensa/bin", 31 | "internalConsoleOptions": "openOnSessionStart" 32 | } 33 | ] 34 | } -------------------------------------------------------------------------------- /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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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 | # AeVOC 2 | Sensor measuring particles and aerosoles down to PM2.5 and VOCs and warn if concentrations get too high. 3 | 4 | ## About the project 5 | 6 | AeVOC is an combined air quality sensor which helps to monitor aerosole concentrations and smelly organic compounds. You can use it to give warning if the air quality degrgades and it gets time to open the windows. 7 | 8 | ![Wire the components like this.](schematic/Verdrahtung-Fritzing.png) 9 | 10 | The sensor contains: 11 | * An SDS011 particle sensor, connected to a serial port. This sensor measures dust particles and aerosoles in the size categsries 10μm and 2,5μm. This measurement is the most important value to determine if the windows need to be opened. Aerosoles can contain viruses an bacteria and an infected person will exhale aerosoles with infections viruses, especially if speaking. If the values measured by the SDS011 rise it is time to exchange the air in the room. 12 | * An CCS811 VOC sensor, connected via i2c. This sensor detects volatile organic compounds which tend to be smelly and can be a health hazard in itself in very high concentrations. As VOCs are mostly emitted by humans the measured level help to detect degrading air quality and the need for fresh air. 13 | * An DHT22 (serial connetion with one wire) which reliably measures temperature and humidity. 14 | * All the sensors are driven by a NodeMCU with an ESP8266. Using this firmware the device publishes all its measurements via MQTT in addition to displaying them on a LED matrix and a small OLED. 15 | * The 0.96" OLED is connected via i2c. It displays all the measurements, a warning summary and for each measurement a small diagram. 16 | * A matrix of 8x8 WS2812-RGB-LEDs displays the most crucial measurements as a color coded diagram. 17 | 18 | There are plans for a nice case made of wood. The document (viewable in the browser) contains technical drawings and the whole CAD design: https://cad.onshape.com/documents/d1397a8c60d8cf10bc632b52/w/d572a7dd96a755f54efafc1b/e/793fdbc24d1e0b242f0b46c7 19 | 20 | There is also a step-by-step guide in german at Make Projects: https://makeprojects.com/de/project/aevoc 21 | 22 | Watch the build on YouTube: https://youtu.be/r93HGVTbWig 23 | 24 | A comprehensive description in german is published in c't 03/21. 25 | 26 | ## Interpreting the LEDs 27 | 28 | The LED matrix displays 8 bar diagrams in its 8 columns. After 3 minutes of measuring all the columns get shifted to the right so the matrix gives an impression of the values in the last 21 to 24 minutes. 29 | 30 | 8 Pixels in the height of each column are no fine resolution so the sensor makes use of colors and brightness. At first the column shows a simple bar diagram using the 8 pixels. If more measurements come in it darkens the existing dtiagram and adds the new measurement in such a way that it never exceeds the maximum brightness for the filled bottom part of the columns. If the column gets faded out in the upper part the size of the fadeout gives an impression on the variance of the measured data. 31 | 32 | The matrix uses 3 color channels to display two values. The blue channel displays the VOC levels. Particles and aerosoles are displayed with the red and green channel. If the newest leftmost measurement features high values the aerosole bar gets red. Middle values mix red and green to produce yellow bars, small values and bars light up in green. As the color channels are overlapping there may ba mixed colors. If VOCs and aerosoles are both in midrange the matrix displays white in the lower part because blue and yellow mix up to a cold white. 33 | 34 | The color for the aerosole amount is only determined for the most recent bar (up to 3 minutes). If there were red bars for high values in the past but the current value is low the matrix colors the high bars in green and the matrix glows bright and green. 35 | 36 | The intuition behind all this is this: 37 | * If the sensor shows green the values are low. 38 | * High aerosole values generate a red warning color and the LEDs are brighter. 39 | * It the VOCs are high too the color gets more white but the bright LEDs indicate a warning. 40 | 41 | ## The Baseline of the CCS811 42 | 43 | The VOC sensor calibrates its internal baseline on its own using the measurements it has seen. Do not expect to get accurate readings after powering the device up. Usually you should expose the sensor to fresh air without VOCs which usually makes it lower its baseline. 44 | 45 | However the sensor semms to calibrate its baseline wrongly from time to time. A wrong baseline may produce values which are much too high (up to factor 100) which make the sensor show much blue. The baseline recalbrates automatically after some hours of use. We experienced the best measurements by just ignoring phases with a wrongly calibrated baseline and simply letting the sensor run. You can reset the baseline with a restart which usually leads to low but not yet calbrated values. 46 | 47 | ## Code structure 48 | 49 | Please build the code using PlatformIO. The `platformio.ini` contains all the dependencies and specifies working upload speeds etc. 50 | All the sources are in `src/`. The code is C++ so there are some classes with a definition in the header file and the implementation in the `.cpp` with the same name. Your starting point should be `main.cpp`. 51 | 52 | In `configHelpers.h` you find maximum and minimum values which scale the diagrams. Please adjust these values if you get to know better maximim and minimum values for your region or because of new scientific insights which aerosol levels may be harmful. We tried to initialize these values with defaults which made sense in december 2020. 53 | -------------------------------------------------------------------------------- /drawings/Abstandshalter.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Abstandshalter.pdf -------------------------------------------------------------------------------- /drawings/Boden-Decke.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Boden-Decke.pdf -------------------------------------------------------------------------------- /drawings/Front.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Front.pdf -------------------------------------------------------------------------------- /drawings/Rueckwand.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Rueckwand.pdf -------------------------------------------------------------------------------- /drawings/Seitenwand.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Seitenwand.pdf -------------------------------------------------------------------------------- /drawings/Zusammenbau.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Zusammenbau.pdf -------------------------------------------------------------------------------- /drawings/Zwischenboden.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Zwischenboden.pdf -------------------------------------------------------------------------------- /drawings/Zwischenwand.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/drawings/Zwischenwand.pdf -------------------------------------------------------------------------------- /include/README: -------------------------------------------------------------------------------- 1 | 2 | This directory is intended for project header files. 3 | 4 | A header file is a file containing C declarations and macro definitions 5 | to be shared between several project source files. You request the use of a 6 | header file in your project source file (C, C++, etc) located in `src` folder 7 | by including it, with the C preprocessing directive `#include'. 8 | 9 | ```src/main.c 10 | 11 | #include "header.h" 12 | 13 | int main (void) 14 | { 15 | ... 16 | } 17 | ``` 18 | 19 | Including a header file produces the same results as copying the header file 20 | into each source file that needs it. Such copying would be time-consuming 21 | and error-prone. With a header file, the related declarations appear 22 | in only one place. If they need to be changed, they can be changed in one 23 | place, and programs that include the header file will automatically use the 24 | new version when next recompiled. The header file eliminates the labor of 25 | finding and changing all the copies as well as the risk that a failure to 26 | find one copy will result in inconsistencies within a program. 27 | 28 | In C, the usual convention is to give header files names that end with `.h'. 29 | It is most portable to use only letters, digits, dashes, and underscores in 30 | header file names, and at most one dot. 31 | 32 | Read more about using header files in official GCC documentation: 33 | 34 | * Include Syntax 35 | * Include Operation 36 | * Once-Only Headers 37 | * Computed Includes 38 | 39 | https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html 40 | -------------------------------------------------------------------------------- /lib/README: -------------------------------------------------------------------------------- 1 | 2 | This directory is intended for project specific (private) libraries. 3 | PlatformIO will compile them to static libraries and link into executable file. 4 | 5 | The source code of each library should be placed in a an own separate directory 6 | ("lib/your_library_name/[here are source files]"). 7 | 8 | For example, see a structure of the following two libraries `Foo` and `Bar`: 9 | 10 | |--lib 11 | | | 12 | | |--Bar 13 | | | |--docs 14 | | | |--examples 15 | | | |--src 16 | | | |- Bar.c 17 | | | |- Bar.h 18 | | | |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html 19 | | | 20 | | |--Foo 21 | | | |- Foo.c 22 | | | |- Foo.h 23 | | | 24 | | |- README --> THIS FILE 25 | | 26 | |- platformio.ini 27 | |--src 28 | |- main.c 29 | 30 | and a contents of `src/main.c`: 31 | ``` 32 | #include 33 | #include 34 | 35 | int main (void) 36 | { 37 | ... 38 | } 39 | 40 | ``` 41 | 42 | PlatformIO Library Dependency Finder will find automatically dependent 43 | libraries scanning project source files. 44 | 45 | More information about PlatformIO Library Dependency Finder 46 | - https://docs.platformio.org/page/librarymanager/ldf.html 47 | -------------------------------------------------------------------------------- /platformio.ini: -------------------------------------------------------------------------------- 1 | ; PlatformIO Project Configuration File 2 | ; 3 | ; Build options: build flags, source filter 4 | ; Upload options: custom upload port, speed and extra flags 5 | ; Library options: dependencies, extra library storages 6 | ; Advanced options: extra scripting 7 | ; 8 | ; Please visit documentation for the other options and examples 9 | ; https://docs.platformio.org/page/projectconf.html 10 | 11 | [env:nodemcuv2] 12 | platform = espressif8266 13 | board = nodemcuv2 14 | framework = arduino 15 | lib_deps = 16 | Arduino 17 | Wire 18 | EspSoftwareSerial 19 | lewapek/Nova Fitness Sds dust sensors library 20 | sparkfun/SparkFun CCS811 Arduino Library 21 | adafruit/Adafruit Unified Sensor 22 | adafruit/DHT sensor library 23 | adafruit/Adafruit NeoPixel 24 | adafruit/Adafruit BusIO 25 | adafruit/Adafruit GFX Library 26 | adafruit/Adafruit SSD1306 27 | PubSubClient 28 | prampec/IotWebConf @ 2.3.3 29 | build_type = debug 30 | upload_port = /dev/ttyUSB0 31 | upload_speed = 921600 32 | monitor_port = /dev/ttyUSB0 33 | monitor_speed = 115200 34 | monitor_filters = esp8266_exception_decoder 35 | -------------------------------------------------------------------------------- /schematic/AEVOC-Schaltung.fzz: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/schematic/AEVOC-Schaltung.fzz -------------------------------------------------------------------------------- /schematic/Verdrahtung-Fritzing.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/schematic/Verdrahtung-Fritzing.png -------------------------------------------------------------------------------- /schematic/schaltplan.pdf: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/pinae/AeVOC/6393ba25c9884e6f917973284bc952c6d8337c0a/schematic/schaltplan.pdf -------------------------------------------------------------------------------- /src/configHelpers.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include "debugLogger.h" 5 | #include "conversionHelpers.h" 6 | #include "configHelpers.h" 7 | #include "webHandlers.h" 8 | #include "mqtt.h" 9 | 10 | #ifndef CONFIG_GLOBALS 11 | #define CONFIG_GLOBALS 12 | #define STRING_LEN 128 13 | 14 | char mqttServerValue[STRING_LEN]; 15 | char mqttPortValue[6] = {'1', '8', '8', '3', '\0', '\0'}; 16 | char mqttUserNameValue[STRING_LEN]; 17 | char mqttUserPasswordValue[STRING_LEN]; 18 | extern WebServer server; 19 | HTTPUpdateServer httpUpdater; 20 | extern IotWebConf iotWebConf; 21 | IotWebConfParameter mqttServerParam = IotWebConfParameter( 22 | "MQTT server", "mqttServer", mqttServerValue, STRING_LEN); 23 | IotWebConfParameter mqttPortParam = IotWebConfParameter( 24 | "MQTT port", "mqttPort", mqttPortValue, 6, "text", "1883", "1883"); 25 | IotWebConfParameter mqttUserNameParam = IotWebConfParameter( 26 | "MQTT user", "mqttUser", mqttUserNameValue, STRING_LEN); 27 | IotWebConfParameter mqttUserPasswordParam = IotWebConfParameter( 28 | "MQTT password", "mqttPass", mqttUserPasswordValue, STRING_LEN, "password"); 29 | bool needReset = false; 30 | bool wifiIsConnected = false; 31 | extern uint8_t matrixBrightness; 32 | extern DebugLogger logger; 33 | 34 | #endif 35 | 36 | DeviceName::DeviceName() { 37 | byte mac[6]; WiFi.macAddress(mac); 38 | char macStr[18]; 39 | sprintf(&macStr[0], "%x:%x:%x:%x:%x:%x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 40 | strncpy(&deviceName[6], macStr, 18); 41 | } 42 | 43 | void DeviceName::print() { 44 | byte mac[6]; WiFi.macAddress(mac); 45 | char macStr[18]; 46 | sprintf(&macStr[0], "%x:%x:%x:%x:%x:%x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); 47 | logger.printf("MAC:\t\t%s\n", macStr); 48 | logger.printf("Device Name:\t%s\n", deviceName); 49 | } 50 | 51 | char* DeviceName::get() { 52 | return &deviceName[0]; 53 | } 54 | 55 | void wifiConnected() { 56 | wifiIsConnected = true; 57 | } 58 | 59 | void configSaved() { 60 | //Serial.println("Configuration was updated."); 61 | needReset = true; 62 | } 63 | 64 | void initWifiAP() { 65 | //Serial.println("Initializing WiFi..."); 66 | iotWebConf.addParameter(&mqttServerParam); 67 | iotWebConf.addParameter(&mqttPortParam); 68 | iotWebConf.addParameter(&mqttUserNameParam); 69 | iotWebConf.addParameter(&mqttUserPasswordParam); 70 | iotWebConf.setConfigSavedCallback(&configSaved); 71 | iotWebConf.setWifiConnectionCallback(&wifiConnected); 72 | iotWebConf.setupUpdateServer(&httpUpdater); 73 | boolean validConfig = iotWebConf.init(); 74 | if (!validConfig) { 75 | mqttServerValue[0] = '\0'; 76 | mqttUserNameValue[0] = '\0'; 77 | mqttUserPasswordValue[0] = '\0'; 78 | } 79 | server.on("/", handleRoot); 80 | server.on("/config", []{ iotWebConf.handleConfig(); }); 81 | server.onNotFound([](){ iotWebConf.handleNotFound(); }); 82 | } 83 | 84 | char* getMqttServer() { 85 | return mqttServerValue; 86 | } 87 | 88 | unsigned long getMqttPort() { 89 | int portVal = strToInt(mqttPortValue); 90 | if (portVal < 0) return 1883; 91 | return portVal; 92 | } 93 | 94 | char* getMqttUsername() { 95 | return mqttUserNameValue; 96 | } 97 | 98 | char* getMqttPassword() { 99 | return mqttUserPasswordValue; 100 | } 101 | 102 | void setMatrixBrightness(char* payload) { 103 | //Serial.printf("Setting the brightness of the LED matrix to %s.\n", payload); 104 | matrixBrightness = strToInt(payload); 105 | } 106 | 107 | void mqttSubscribe() { 108 | subscribeToTopic("setMatrixBrightness", setMatrixBrightness); 109 | } 110 | 111 | void loopWifiChecks() { 112 | mqttSetup(mqttSubscribe); 113 | mqttLoop(); 114 | if (needReset) { 115 | Serial.println("Rebooting after 1 second."); 116 | iotWebConf.delay(1000); 117 | ESP.restart(); 118 | } 119 | } 120 | 121 | void iotWebConfDelay(unsigned long duration) { 122 | iotWebConf.delay(duration); 123 | } -------------------------------------------------------------------------------- /src/configHelpers.h: -------------------------------------------------------------------------------- 1 | #ifndef DEV_NAME_CLASS 2 | #define DEV_NAME_CLASS 3 | 4 | class DeviceName { 5 | public: 6 | DeviceName(); 7 | void print(); 8 | char* get(); 9 | 10 | private: 11 | char deviceName[24] = {'A', 'E', 'V', 'O', 'C', '-', 12 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; 13 | }; 14 | 15 | #endif 16 | 17 | #ifndef EXTREMES 18 | #define EXTREMES 19 | 20 | #define PM25_MINIMUM 3.0f 21 | #define PM25_EXTREME 13.0f 22 | #define PM10_MINIMUM 4.0f 23 | #define PM10_EXTREME 20.0f 24 | #define VOC_MINIMUM 0.0f 25 | #define VOC_EXTREME 850.0f 26 | #define CO2_MINIMUM 400.0f 27 | #define CO2_EXTREME 1500.0f 28 | #define TEMP_MINIMUM 15.0f 29 | #define TEMP_EXTREME 25.0f 30 | #define HUMIDITY_MINIMUM 40.0f 31 | #define HUMIDITY_EXTREME 68.0f 32 | 33 | #endif 34 | 35 | void initWifiAP(); 36 | char* getMqttServer(); 37 | unsigned long getMqttPort(); 38 | char* getMqttUsername(); 39 | char* getMqttPassword(); 40 | void loopWifiChecks(); 41 | void iotWebConfDelay(unsigned long duration); -------------------------------------------------------------------------------- /src/conversionHelpers.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | int strToInt(char* str) { 4 | char** conversionErrorPos = 0; 5 | int convertedNumber = strtoul(str, conversionErrorPos, 10); 6 | //Serial.printf("Converting \"%s\" to %d.\n", str, convertedNumber); 7 | if (conversionErrorPos == 0) { 8 | return convertedNumber; 9 | } else { 10 | Serial.printf("Error converting char* to number: %s\n", str); 11 | } 12 | return -1; 13 | } -------------------------------------------------------------------------------- /src/conversionHelpers.h: -------------------------------------------------------------------------------- 1 | int strToInt(char* str); -------------------------------------------------------------------------------- /src/debugLogger.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include "debugLogger.h" 7 | 8 | DebugLoggerListItem::DebugLoggerListItem(char* str) { 9 | content = str; 10 | } 11 | 12 | void DebugLoggerListItem::setNext(DebugLoggerListItem* newNext) { 13 | nextItem = newNext; 14 | } 15 | 16 | DebugLoggerListItem* DebugLoggerListItem::getNext() { 17 | return nextItem; 18 | } 19 | 20 | char* DebugLoggerListItem::getContent() { 21 | return content; 22 | } 23 | 24 | DebugLogger::DebugLogger() { 25 | locked = false; 26 | } 27 | 28 | bool DebugLogger::lockList() { 29 | if (locked) return false; 30 | locked = true; 31 | return true; 32 | } 33 | 34 | void DebugLogger::unlockList() { 35 | locked = false; 36 | } 37 | 38 | void DebugLogger::print(char* str) { 39 | DebugLoggerListItem* newItem = new DebugLoggerListItem(str); 40 | if (!lockList()) { // If unable to acquire the log the message gets discarded. 41 | return; 42 | } 43 | DebugLoggerListItem* i = list; 44 | if (!i) { list = newItem; } 45 | else { 46 | while (i->getNext()) { i = i->getNext(); } 47 | i->setNext(newItem); 48 | } 49 | unlockList(); 50 | } 51 | 52 | char* DebugLogger::getBuffer() { 53 | char* str = (char*) malloc(MAX_DEBUG_STR_LEN); 54 | return str; 55 | } 56 | 57 | char* DebugLogger::resizeBuffer(char* str) { 58 | return (char*) realloc(str, strlen(str) + 1); 59 | } 60 | 61 | void DebugLogger::printf(const char* format, ...) { 62 | if (ESP.getFreeHeap() < MIN_FREE_HEAP) return; 63 | char* str = getBuffer(); 64 | va_list argptr; 65 | va_start(argptr, format); 66 | vsprintf(str, format, argptr); 67 | va_end(argptr); 68 | str = resizeBuffer(str); 69 | print(str); 70 | } 71 | 72 | void DebugLogger::printAllWithSerial() { 73 | noInterrupts(); 74 | if (!lockList()) { 75 | Serial.print("Logger is currently being filled. "); 76 | Serial.println("Printing will resume in the next iteration."); 77 | return; 78 | } 79 | DebugLoggerListItem* i = list; 80 | while (i) { 81 | Serial.print(i->getContent()); 82 | DebugLoggerListItem* old = i; 83 | i = i->getNext(); 84 | free(old->getContent()); 85 | delete old; 86 | } 87 | list = NULL; 88 | unlockList(); 89 | interrupts(); 90 | } -------------------------------------------------------------------------------- /src/debugLogger.h: -------------------------------------------------------------------------------- 1 | #ifndef DEBUG_LOGGER_CLASS 2 | #define DEBUG_LOGGER_CLASS 3 | #define MAX_DEBUG_STR_LEN 256 4 | #define MIN_FREE_HEAP 10000 5 | 6 | class DebugLoggerListItem { 7 | public: 8 | DebugLoggerListItem(char* str); 9 | void setNext(DebugLoggerListItem* newNext); 10 | DebugLoggerListItem* getNext(); 11 | char* getContent(); 12 | 13 | private: 14 | char* content; 15 | DebugLoggerListItem* nextItem = NULL; 16 | }; 17 | 18 | class DebugLogger { 19 | public: 20 | DebugLogger(); 21 | char* getBuffer(); 22 | char* resizeBuffer(char* str); 23 | void print(char* str); 24 | void printf(const char * format, ...); 25 | void printAllWithSerial(); 26 | 27 | private: 28 | bool locked = false; 29 | DebugLoggerListItem* list = NULL; 30 | bool lockList(); 31 | void unlockList(); 32 | }; 33 | 34 | #endif -------------------------------------------------------------------------------- /src/i2cHelpers.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | 4 | void scanI2C() { 5 | Serial.println("Scanning for i2c devices..."); 6 | for (byte address = 1; address < 127; address++ ) { 7 | Wire.beginTransmission(address); 8 | byte error = Wire.endTransmission(); 9 | if (error == 0) { 10 | Serial.print("I2C device found at address 0x"); 11 | if (address<16) Serial.print("0"); 12 | Serial.print(address, HEX); 13 | Serial.println(" !"); 14 | } else if (error==4) { 15 | Serial.print("Unknow error at address 0x"); 16 | if (address<16) Serial.print("0"); 17 | Serial.println(address, HEX); 18 | } 19 | } 20 | } -------------------------------------------------------------------------------- /src/i2cHelpers.h: -------------------------------------------------------------------------------- 1 | void scanI2C(); -------------------------------------------------------------------------------- /src/main.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include "debugLogger.h" 13 | #include "i2cHelpers.h" 14 | #include "neopixelMatrix.h" 15 | #include "oledFunctions.h" 16 | #include "configHelpers.h" 17 | #include "mqtt.h" 18 | 19 | #define PM_SERIAL_RX D7 20 | #define PM_SERIAL_TX D8 21 | #define I2C_PIN_SCL D5 22 | #define I2C_PIN_SDA D6 23 | #define I2C_2_PIN_SCL D9 24 | #define I2C_2_PIN_SDA D10 25 | #define CCS811_ADDR 0x5A 26 | #define NUM_LEDS 64 27 | #define SCREEN_WIDTH 128 // OLED display width, in pixels 28 | #define SCREEN_HEIGHT 64 // OLED display height, in pixels 29 | #define OLED_RESET 0 30 | #define CONFIG_VERSION "v0.2.1" 31 | 32 | DebugLogger logger; 33 | SdsDustSensor sds(PM_SERIAL_RX, PM_SERIAL_TX); 34 | CCS811 ccs(CCS811_ADDR); 35 | DHT dht(D2, DHT22); 36 | float temperature, humidity; 37 | float pm25, pm10; 38 | uint16_t co2, voc; 39 | Adafruit_NeoPixel leds = Adafruit_NeoPixel(NUM_LEDS, D4, NEO_GRB + NEO_KHZ800); 40 | Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); 41 | unsigned long lastShift = 0; 42 | unsigned long lastMeasurement = 0; 43 | DNSServer dnsServer; 44 | WebServer server(80); 45 | const char wifiInitialApPassword[] = "loving_ct"; 46 | DeviceName devName; 47 | IotWebConf iotWebConf(devName.get(), &dnsServer, &server, wifiInitialApPassword, CONFIG_VERSION); 48 | uint8_t matrixBrightness = 50; 49 | 50 | void setup() { 51 | Serial.begin(115200); 52 | while(!Serial) {} // Wait for Serial to start 53 | delay(750); 54 | devName.print(); 55 | initWifiAP(); 56 | Serial.println("Initializing i2c..."); 57 | Wire.begin(I2C_PIN_SDA, I2C_PIN_SCL); 58 | Wire.setClockStretchLimit(500); 59 | scanI2C(); 60 | Serial.println("Initializing Display..."); 61 | if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64 62 | Serial.println(F("SSD1306 allocation failed")); 63 | } else { 64 | display.display(); 65 | } 66 | delay(800); 67 | Serial.println("Initializing SDS011 particle sensor..."); 68 | sds.begin(); 69 | Serial.println(sds.queryFirmwareVersion().toString()); // prints firmware version 70 | Serial.println(sds.setActiveReportingMode().toString()); // ensures sensor is in 'active' reporting mode 71 | Serial.println(sds.setContinuousWorkingPeriod().toString()); // ensures sensor has continuous working period - default but not recommended 72 | Serial.println("Initializing DHT22 temperature and humidity sensor..."); 73 | dht.begin(); 74 | temperature = dht.readTemperature(false); 75 | humidity = dht.readHumidity(); 76 | Serial.println("Initializing CCS811 VOC air quality and CO2 sensor..."); 77 | CCS811Core::CCS811_Status_e returnCode = ccs.beginWithStatus(Wire); 78 | Serial.printf("CCS811.begin() exited with: %s\n", ccs.statusString(returnCode)); 79 | ccs.setDriveMode(1); // Measure every second. 80 | ccs.setEnvironmentalData(humidity, temperature); 81 | leds.begin(); 82 | leds.setBrightness(matrixBrightness); 83 | for (int i = 0; i < NUM_LEDS; i++) { 84 | leds.setPixelColor(i, leds.Color(0, 0, 0)); 85 | } 86 | leds.show(); 87 | Serial.println("Clearing Measurements..."); 88 | shiftVocMeasurements(0.0f); 89 | shiftPmMeasurements(0.0f); 90 | Serial.println("Setup complete."); 91 | unsigned long now = millis(); 92 | lastShift = now; 93 | lastMeasurement = now; 94 | } 95 | 96 | void measure() { 97 | Serial.println("---------------------------"); 98 | temperature = dht.readTemperature(false); 99 | humidity = dht.readHumidity(); 100 | if (isnan(humidity) || isnan(temperature)) { 101 | Serial.println(F("Failed to read from DHT sensor!")); 102 | } else { 103 | char temperatureStr[50]; 104 | sprintf(&temperatureStr[0], "%2.1f", temperature); 105 | publishToMqtt("temperature", &temperatureStr[0]); 106 | char humidityStr[50]; 107 | sprintf(&humidityStr[0], "%2.1f", humidity); 108 | publishToMqtt("humidity", &humidityStr[0]); 109 | } 110 | float hic = dht.computeHeatIndex(temperature, humidity, false); 111 | Serial.printf("Temperature: %2.1f°C Humidity: %2.1f%% Heat index: %2.1f°C\n", 112 | temperature, humidity, hic); 113 | ccs.setEnvironmentalData(humidity, temperature); 114 | PmResult pm = sds.readPm(); 115 | if (pm.isOk()) { 116 | pm25 = pm.pm25; 117 | pm10 = pm.pm10; 118 | Serial.print("PM2.5 = "); 119 | Serial.print(pm25); 120 | Serial.print(", PM10 = "); 121 | Serial.println(pm10); 122 | addPmMeasurement(maxOf( 123 | normValue((float) pm25, PM25_MINIMUM, PM25_EXTREME), 124 | normValue((float) pm10, PM10_MINIMUM, PM10_EXTREME))); 125 | char pmJson[80]; 126 | sprintf(&pmJson[0], "{\"pm2,5\": %2.2f, \"pm10\": %2.2f}", pm25, pm10); 127 | publishToMqtt("particles_and_aerosoles", &pmJson[0]); 128 | } else { 129 | Serial.print("Could not read values from sensor, reason: "); 130 | Serial.println(pm.statusToString()); 131 | } 132 | if (ccs.dataAvailable()) { 133 | ccs.readAlgorithmResults(); 134 | Serial.printf("CCS baseline: %u\n", ccs.getBaseline()); 135 | uint16_t newCo2 = ccs.getCO2(); 136 | uint16_t newVoc = ccs.getTVOC(); 137 | Serial.printf("tVOC = %u CO2 (projection) = %u\n", newVoc, newCo2); 138 | if (sanityCheck(newCo2, 400, 5000)) co2 = newCo2; 139 | if (sanityCheck(newVoc, 0, 4000)) { 140 | voc = newVoc; 141 | addVocMeasurement(normValue((float) voc, VOC_MINIMUM, VOC_EXTREME)); 142 | } 143 | char vocJson[80]; 144 | sprintf(&vocJson[0], "{\"tVOC\": %u, \"CO2\": %u}", newVoc, newCo2); 145 | publishToMqtt("voc", &vocJson[0]); 146 | } 147 | } 148 | 149 | void loop() { 150 | unsigned long now = millis(); 151 | iotWebConf.doLoop(); 152 | loopWifiChecks(); 153 | if ((now - lastMeasurement) > 1000) { 154 | measure(); 155 | if ((now - lastShift) > (3 * 60 * 1000)) { 156 | shiftPmMeasurements(maxOf( 157 | normValue((float) pm25, PM25_MINIMUM, PM25_EXTREME), 158 | normValue((float) pm10, PM10_MINIMUM, PM10_EXTREME))); 159 | shiftVocMeasurements(normValue((float) voc, VOC_MINIMUM, VOC_EXTREME)); 160 | lastShift = now; 161 | } 162 | displayMeasurements(pm25, pm10, co2, voc, temperature, humidity); 163 | leds.setBrightness(matrixBrightness); 164 | displayMatrix(); 165 | Serial.printf("Free Heap: %u\n", ESP.getFreeHeap()); 166 | lastMeasurement = now; 167 | } 168 | logger.printAllWithSerial(); 169 | } 170 | -------------------------------------------------------------------------------- /src/mqtt.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include "debugLogger.h" 5 | #include "mqtt.h" 6 | #include "configHelpers.h" 7 | 8 | #ifndef MQTT_GLOBALS 9 | #define MQTT_GLOBALS 10 | 11 | extern DeviceName devName; 12 | extern DebugLogger logger; 13 | WiFiClient espClient; 14 | PubSubClient mqttClient(espClient); 15 | SubscribedMqttTopicList* subscribedTopicsList = NULL; 16 | void (*savedSubscriptionCallback)(); 17 | bool setupDone = false; 18 | extern bool wifiIsConnected; 19 | 20 | #endif 21 | 22 | SubscribedMqttTopic::SubscribedMqttTopic( 23 | char* fullTopicStr, 24 | void (*callbackFunction)(char*)) { 25 | topic = fullTopicStr; 26 | callback = callbackFunction; 27 | } 28 | 29 | SubscribedMqttTopicList::SubscribedMqttTopicList( 30 | SubscribedMqttTopic* newTopic, 31 | SubscribedMqttTopicList* nextElement) { 32 | entry = newTopic; 33 | next = nextElement; 34 | } 35 | 36 | char* SubscribedMqttTopic::getTopic() { 37 | return topic; 38 | } 39 | 40 | char* SubscribedMqttTopicList::getTopic() { 41 | return entry->getTopic(); 42 | } 43 | 44 | SubscribedMqttTopic* SubscribedMqttTopicList::getEntry() { 45 | return entry; 46 | } 47 | 48 | SubscribedMqttTopicList* SubscribedMqttTopicList::getNext() { 49 | return next; 50 | } 51 | 52 | void onMqttMessage(char* topic, byte* payload, unsigned int length) { 53 | char* plStr = (char*) calloc(length+1, sizeof(char)); 54 | strncpy(plStr, (char*) payload, length); 55 | *(plStr + length) = 0; 56 | logger.printf("MQTT: %s (len: %d) - Payload: %s\n", 57 | topic, length, plStr); 58 | SubscribedMqttTopicList* stl = subscribedTopicsList; 59 | while(stl != NULL) { 60 | if (strcmp(stl->getTopic(), topic) == 0) { 61 | logger.printf("Found topic: %s\n", stl->getTopic()); 62 | stl->getEntry()->callback(plStr); 63 | break; 64 | } 65 | stl = stl->getNext(); 66 | } 67 | logger.printf("-----------------\n"); 68 | free(plStr); 69 | } 70 | 71 | char* createFullTopicStr(const char* topic) { 72 | char* deviceName = devName.get(); 73 | unsigned int topicLen = strlen(deviceName)+1+strlen(topic); 74 | char* fullTopicStr = (char*) calloc(topicLen+1, sizeof(char)); 75 | strncpy(fullTopicStr, deviceName, strlen(deviceName)); 76 | strncpy(fullTopicStr+strlen(deviceName), "/", 2); 77 | strncpy(fullTopicStr+strlen(deviceName)+1, topic, strlen(topic)); 78 | *(fullTopicStr + topicLen+1) = '\0'; 79 | return fullTopicStr; 80 | } 81 | 82 | void subscribeToTopic(const char* topic, void (*callback)(char*)) { 83 | if (!wifiIsConnected || !mqttClient.connected()) return; 84 | char* fullTopicStr = createFullTopicStr(topic); 85 | mqttClient.subscribe(fullTopicStr); 86 | SubscribedMqttTopic* newTopic = new SubscribedMqttTopic(fullTopicStr, callback); 87 | SubscribedMqttTopicList* newTopicListElem = new SubscribedMqttTopicList( 88 | newTopic, subscribedTopicsList); 89 | subscribedTopicsList = newTopicListElem; 90 | logger.printf("Subscribed to MQTT-topic: %s\n", fullTopicStr); 91 | } 92 | 93 | void connectToMqtt(void (*subscriptionCallback)()) { 94 | boolean successfullyConnected = false; 95 | while (!mqttClient.connected()) { 96 | //Serial.printf("Attempting MQTT connection... "); 97 | logger.printf("Attempting MQTT connection... "); 98 | if (strlen(getMqttUsername()) > 0 && strlen(getMqttPassword())) { 99 | //Serial.printf("\nMQTT: Using credentials: %s PW: %s\n", 100 | // getMqttUsername(), getMqttPassword()); 101 | logger.printf("\nMQTT: Using credentials: %s PW: %s\n", 102 | getMqttUsername(), getMqttPassword()); 103 | successfullyConnected = mqttClient.connect( 104 | devName.get(), getMqttUsername(), getMqttPassword()); 105 | } else { 106 | //Serial.printf("Connecting without credentials. Name: %s\n", devName.get()); 107 | successfullyConnected = mqttClient.connect(devName.get()); 108 | } 109 | if (successfullyConnected) { 110 | //Serial.printf("connected!\n"); 111 | logger.printf("connected!\n"); 112 | subscriptionCallback(); 113 | } else { 114 | //Serial.printf("failed, rc=%d \ntry again in 1 second.\n", mqttClient.state()); 115 | logger.printf("failed, rc=%d \ntry again in 1 second.\n", mqttClient.state()); 116 | // Wait at least 1 second before retrying 117 | iotWebConfDelay(999); 118 | return; 119 | } 120 | } 121 | } 122 | 123 | void mqttSetup(void (*subscriptionCallback)()) { 124 | savedSubscriptionCallback = subscriptionCallback; 125 | if (!setupDone) { 126 | Serial.printf("mqttSetup: %s:%lu\n", getMqttServer(), getMqttPort()); 127 | mqttClient.setServer(getMqttServer(), getMqttPort()); 128 | mqttClient.setCallback(onMqttMessage); 129 | setupDone = true; 130 | } 131 | } 132 | 133 | void publishToMqtt(const char* topic, char* payload) { 134 | if (!wifiIsConnected || !mqttClient.connected()) return; 135 | char* fullTopicStr = createFullTopicStr(topic); 136 | mqttClient.publish(fullTopicStr, payload); 137 | free(fullTopicStr); 138 | } 139 | 140 | bool mqttConnected() { 141 | return mqttClient.connected(); 142 | } 143 | 144 | void mqttLoop() { 145 | if (!setupDone) return; 146 | if (wifiIsConnected && !mqttClient.connected()) { 147 | connectToMqtt(savedSubscriptionCallback); 148 | } 149 | mqttClient.loop(); 150 | } 151 | -------------------------------------------------------------------------------- /src/mqtt.h: -------------------------------------------------------------------------------- 1 | #ifndef MQTT_TYPES 2 | #define MQTT_TYPES 3 | 4 | class SubscribedMqttTopic { 5 | public: 6 | SubscribedMqttTopic(char* fullTopicStr, void (*callbackFunction)(char*)); 7 | char* getTopic(); 8 | void (*callback)(char*); 9 | 10 | private: 11 | char* topic; 12 | }; 13 | 14 | class SubscribedMqttTopicList { 15 | public: 16 | SubscribedMqttTopicList( 17 | SubscribedMqttTopic* newTopic, 18 | SubscribedMqttTopicList* nextElement); 19 | char* getTopic(); 20 | SubscribedMqttTopic* getEntry(); 21 | SubscribedMqttTopicList* getNext(); 22 | 23 | private: 24 | SubscribedMqttTopic* entry; 25 | SubscribedMqttTopicList* next; 26 | }; 27 | 28 | #endif 29 | 30 | void mqttSetup(void (*subscriptionCallback)()); 31 | void mqttLoop(); 32 | bool mqttConnected(); 33 | void subscribeToTopic(const char* topic, void (*callback)(char*)); 34 | void publishToMqtt(const char* topic, char* payload); -------------------------------------------------------------------------------- /src/neopixelMatrix.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | extern Adafruit_NeoPixel leds; 4 | float pmMatrix[64] = {0.0f}; 5 | float vocMatrix[64] = {0.0f}; 6 | uint16_t pmValCount = 0; 7 | uint16_t vocValCount = 0; 8 | 9 | float normValue(float val, float minVal, float maxVal) { 10 | float normedVal = (val - minVal) / (maxVal - minVal); 11 | if (normedVal < 0.0f) normedVal = 0.0f; 12 | if (normedVal > 1.0f) normedVal = 1.0f; 13 | return normedVal; 14 | } 15 | 16 | bool sanityCheck(float val, float minVal, float maxVal) { 17 | if (val < minVal) return false; 18 | if (val > maxVal) return false; 19 | return true; 20 | } 21 | 22 | bool sanityCheck(uint16_t val, uint16_t minVal, uint16_t maxVal) { 23 | if (val < minVal) return false; 24 | if (val > maxVal) return false; 25 | return true; 26 | } 27 | 28 | float maxOf(float a, float b) { 29 | if (b > a) return b; 30 | return a; 31 | } 32 | 33 | void shiftPmMeasurements(float pm) { 34 | uint8_t i; 35 | for (i = 7*8+7; i >= 8; i--) { 36 | pmMatrix[i] = pmMatrix[i-8]; 37 | } 38 | pmValCount = 1; 39 | for (i = 0; i < 8; i++) { 40 | if (round(pm * 8.0f) > i) { 41 | pmMatrix[i] = 1.0f; 42 | } else { 43 | pmMatrix[i] = 0.0f; 44 | } 45 | } 46 | } 47 | 48 | void addPmMeasurement(float pm) { 49 | pmValCount++; 50 | for (uint8_t i = 0; i < 8; i++) { 51 | float measFrac = 1.0f/((float) pmValCount); 52 | pmMatrix[i] = (1.0f-measFrac) * pmMatrix[i]; 53 | if (round(pm * 8.0f) > i) pmMatrix[i] += measFrac; 54 | } 55 | } 56 | 57 | void shiftVocMeasurements(float voc) { 58 | uint8_t i; 59 | for (i = 7*8+7; i >= 8; i--) { 60 | vocMatrix[i] = vocMatrix[i-8]; 61 | } 62 | vocValCount = 1; 63 | for (uint8_t i = 0; i < 8; i++) { 64 | if (round(voc * 8.0f) > i) { 65 | vocMatrix[i] = 1.0f; 66 | } else { 67 | vocMatrix[i] = 0.0f; 68 | } 69 | } 70 | } 71 | 72 | void addVocMeasurement(float voc) { 73 | vocValCount++; 74 | for (uint8_t i = 0; i < 8; i++) { 75 | float measFrac = 1.0f/((float) vocValCount); 76 | vocMatrix[i] = (1.0f-measFrac) * vocMatrix[i]; 77 | if (round(voc * 8.0f) > i) vocMatrix[i] += measFrac; 78 | } 79 | } 80 | 81 | void displayMatrix() { 82 | uint8_t pmSeverity = 0; 83 | for (uint8_t i = 0; i < 8; i++) { 84 | if (pmMatrix[i] > 0.01f) { 85 | pmSeverity = i; 86 | } else { 87 | break; 88 | } 89 | } 90 | for (uint8_t i = 0; i < 64; i++) { 91 | leds.setPixelColor(i, leds.Color( 92 | (uint8_t) round(pmMatrix[i]*(pmSeverity/8.0f)*255), 93 | (uint8_t) round(pmMatrix[i]*(1.0f-pmSeverity/8.0f)*255), 94 | (uint8_t) round(vocMatrix[i]*255))); 95 | } 96 | leds.show(); 97 | } -------------------------------------------------------------------------------- /src/neopixelMatrix.h: -------------------------------------------------------------------------------- 1 | float normValue(float val, float minVal, float maxVal); 2 | bool sanityCheck(float val, float minVal, float maxVal); 3 | bool sanityCheck(uint16_t val, uint16_t minVal, uint16_t maxVal); 4 | float maxOf(float a, float b); 5 | void shiftPmMeasurements(float pm); 6 | void addPmMeasurement(float pm); 7 | void shiftVocMeasurements(float voc); 8 | void addVocMeasurement(float voc); 9 | void displayMatrix(); -------------------------------------------------------------------------------- /src/oledFunctions.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include "configHelpers.h" 5 | 6 | extern Adafruit_SSD1306 display; 7 | 8 | void drawBarDiagram(int16_t y, float value, float minVal, float maxVal) { 9 | display.drawRect(73, y, 128-73, 7, WHITE); 10 | display.fillRect(73, y, 11 | (int) round((value-minVal)/(maxVal-minVal)*(128-73)), 12 | 7, WHITE); 13 | } 14 | 15 | void displayMeasurements(float pm25, float pm10, 16 | uint16_t co2, uint16_t voc, 17 | float temperature, float humidity) { 18 | display.clearDisplay(); 19 | display.setTextSize(1); 20 | display.setTextColor(WHITE); 21 | display.setCursor(0, 16); 22 | display.cp437(true); 23 | display.printf("PM2,5: %2.2f\n", pm25); 24 | drawBarDiagram(16, pm25, PM25_MINIMUM, PM25_EXTREME); 25 | display.printf("PM10: %2.2f\n", pm10); 26 | drawBarDiagram(24, pm10, PM10_MINIMUM, PM10_EXTREME); 27 | display.printf("CO2: %u ppm\n", co2); 28 | drawBarDiagram(32, (float) co2, CO2_MINIMUM, CO2_EXTREME); 29 | display.printf("VOC: %u ppb\n", voc); 30 | drawBarDiagram(38, (float) voc, VOC_MINIMUM, VOC_EXTREME); 31 | display.printf("%2.1f\n", temperature); 32 | display.drawCircle(26, 49, 1, WHITE); 33 | display.drawChar(29, 48, 'C', WHITE, BLACK, 1); 34 | drawBarDiagram(46, temperature, TEMP_MINIMUM, TEMP_EXTREME); 35 | display.drawLine(3, 56, 0, 59, WHITE); 36 | display.drawLine(0, 59, 0, 61, WHITE); 37 | display.drawLine(0, 61, 2, 63, WHITE); 38 | display.drawLine(2, 63, 4, 63, WHITE); 39 | display.drawLine(4, 63, 6, 61, WHITE); 40 | display.drawLine(6, 61, 6, 59, WHITE); 41 | display.drawLine(6, 59, 3, 56, WHITE); 42 | display.printf(" %2.0f%%", humidity); 43 | drawBarDiagram(54, humidity, HUMIDITY_MINIMUM, HUMIDITY_EXTREME); 44 | display.setTextSize(2); 45 | display.setCursor(0, 0); 46 | char topText[12]; 47 | sprintf(&topText[0], "Alles OK."); 48 | if (co2 > 1000) sprintf(&topText[0], "CO2: zzz.."); 49 | if (co2 > 1500) sprintf(&topText[0], "Zuviel CO2"); 50 | if (humidity > 67) sprintf(&topText[0], "Schimmel!"); 51 | if (voc > 550) sprintf(&topText[0], "Gestank!"); 52 | if (pm25 > 6.0f || pm10 > 15.0f) sprintf(&topText[0], "Aerosole!"); 53 | display.println(topText); 54 | display.display(); 55 | } -------------------------------------------------------------------------------- /src/oledFunctions.h: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | void drawBarDiagram(int16_t y, float value, float minVal, float maxVal); 4 | void displayMeasurements(float pm25, float pm10, 5 | uint16_t co2, uint16_t voc, 6 | float temperature, float humidity); -------------------------------------------------------------------------------- /src/webHandlers.cpp: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include "debugLogger.h" 4 | 5 | extern WebServer server; 6 | extern IotWebConf iotWebConf; 7 | extern DebugLogger logger; 8 | 9 | void handleRoot() { 10 | logger.printf("HTTP Request to /\n"); 11 | // -- Let IotWebConf test and handle captive portal requests. 12 | if (iotWebConf.handleCaptivePortal()) 13 | { 14 | // -- Captive portal request were already served. 15 | return; 16 | } 17 | String s = "" 18 | "" 19 | "IotWebConf 01 MinimalHello world!" 20 | "Go to configure page to change settings." 21 | "\n"; 22 | 23 | server.send(200, "text/html", s); 24 | } -------------------------------------------------------------------------------- /src/webHandlers.h: -------------------------------------------------------------------------------- 1 | void handleRoot(); -------------------------------------------------------------------------------- /test/README: -------------------------------------------------------------------------------- 1 | 2 | This directory is intended for PlatformIO Unit Testing and project tests. 3 | 4 | Unit Testing is a software testing method by which individual units of 5 | source code, sets of one or more MCU program modules together with associated 6 | control data, usage procedures, and operating procedures, are tested to 7 | determine whether they are fit for use. Unit testing finds problems early 8 | in the development cycle. 9 | 10 | More information about PlatformIO Unit Testing: 11 | - https://docs.platformio.org/page/plus/unit-testing.html 12 | --------------------------------------------------------------------------------