code for the esp8266 relay control 1ch free in the description of the video
instructions:
https://youtu.be/Us20Njx_YXM
1.download the android app here
2.download github code for the esp8266 in the youtube video.
3.upload code to your esp8266 with arduino IDE.
4.choose ip addres and port that you assigned to each esp8266.
more info feel free to write me
[email protected].