i define a String value in my nodemcu like this.
String a = "abc";
now i want to transfer it to arduino throught pin gpio5 to pin 10 arduino.
and i want to read from pin 10 and print it.
how can i do this?
should i convert String a to a int value in nodemcu and then analogWrite it to pin gpio 5 then analogRead it from pin 10?
i just want to show a word that come from server from app to nodemcu and transfer it from nodemcu to arduino then i want to show it in lcd 16*2 that connected to arduino.