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esp8266-mqtt-matrix

Code for notifications via mqtt with Esp8266 and 8x8 max7219 driven led matrix

  • You will need an Esp8266 board , five jumpers and an 8x8 max7219 driven led matrix.

  • I use it with a mosquitto server, openhab 2.0 (with openhab cloud), and ifttt.

  • Dont forget to install openhab cloud bidding , enable your items through the PAPER UI , and connect it to ifttt.

  • My code is not storage efficient (pretty noob with c),be aware it could not fit your device.

  • This code uses librarys that are not mine , all credits to the developers that created them. Such as : https://github.com/esp8266/Arduino/tree/master/libraries/ESP8266WiFi
    https://github.com/knolleary/pubsubclient
    https://github.com/wayoda/LedControl

  • First release has only youtube and gmail icons.This web is neat for drawing new ones:
    https://xantorohara.github.io/led-matrix-editor/

  • It works with one or more displays , eventhough the code is now working with only one.

  • You are free to use it and edit it as you want , also i'll upload any provided change if it performs better in any way.

  • Schematics of the connection:

      Display<+++++>esp<---->wifi<----->mqtt + openhab
                                               ^
                                               |
                                               |
                                            internet(openhab cloud)<-----> ifttt
                                                                              ^
             new Gmail--------------------------------------------------------|                      
             new Youtube video -----------------------------------------------|

  • You will have to edit this parameters to suit your configuration.

    const char* ssid = "WLAN_XXXX"; // red wifi
const char* password =  "PASSWORD"; // contraseña
const char* mqttServer = "server.lan/"; // direccion servidor mqtt
const int mqttPort = 1883; // puerto de escucha del servidor mqtt
const char* mqttUser = "USER"; // usuario mqtt
const char* mqttPassword = "USERPASS"; // contraseña mqtt
const char* tp = "cmnd/EspNotifier"; // hilo de sub/pub
int data = 14;    // DIN pin of MAX7219 module
int load = 13;    // CS pin of MAX7219 module
int clock = 12;  // CLK pin of MAX7219 module
int maxInUse = 1;  //how many MAX7219 are connected

SerialToMatrix

  • You will need an Esp8266 board , five jumpers and an 8x8 max7219 driven led matrix.

  • My code is not storage efficient (pretty noob with c),be aware it could not fit your device.

  • This code uses librarys that are not mine , all credits to the developers that created them. Such as : https://github.com/t3chguy/arudino-maxmatrix-library

  • It works with one or more displays , eventhough the code is now working with only one.

  • You are free to use it and edit it as you want , also i'll upload any provided change if it performs better in any way.

  • You will have to edit this parameters to suit your configuration.

       int data = 14;    // DIN pin of MAX7219 module
   int load = 13;    // CS pin of MAX7219 module
   int clock = 12;  // CLK pin of MAX7219 module
   int maxInUse = 1;  //how many MAX7219 are connected

  • Scheme

      Serial:
  Please enter something: 
          hello world
  Please enter speed: 
          70
          ||
           ------------------------------->Matrix(showing "hello world" at speed "70")