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, ...

This software was built using the Vs Code extension PlatformIO. With both installed you should be able to upload it to your ESP8266 fairly easily. Uploading data to google sheets. By default, this ...