Dot matrix max7219 with esp8266 running text change text with phone
Esp8266 nodemcu IoT can do many things as wifi and can change the text from phone to another device or turn on and off the led, this tutorial im using max7219 for running text device and esp8266 as controller with CH341A as programmer.
Arduino ide as compiler to upload the sketch of max7219 from parola.
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