DotMatrixDisplay

Display messages to a DOT Matrix Display. I use it to print usefull messages from my home automation solution (jeedom).

Prerequisites

• ESP8266 (mine is Wemos D1 NodeMcu ESP12F)
• DOT Matrix based on MAX7219
• OLED display (SSD1306 and SH1106 based 128x64 pixel) - optional
• Temperature sensor DS18B20 - optional
• Light sensor GL5516 - optional

Features

• Display message by using simple http remote command (GET URL)
• NTP client for date and time
• Temperature measurement
• LED matrix dimming based on light sensor
• Read a file to display text (TODO)
• more to come

Usage

• Make sure your DotMatrix is properly configured according to MAX72xx (MAX72xx.h)
• Drop the code to your ESP8266, third party libraries are included
• First time the ESP8266 should act as an access point (ESPxxxx), connect to it then go to http://192.168.4.1/ to configure your WIFI SSID/Password (STORE in EEPROM), then restart
• OLED should now display your IP on your network
• HTTP Command is available and describe at http://IP/command

Sketch

License

This project is licensed under the GPL License

Acknowledgments

Thank you very much to DIYDave for his code and inspiration

Libraries used, thanks to their respectives authors

• MD_Parola DotMatrix management library
• MAX72xx Max7219 library
• WifiManager Wifi management
• SSD1306 OLED library