NodeMCU Relay Control

Micropython script to work as a http server to control nodemcu pins.

ESP8266 doesn't come with a web framework. So I had to repurpose the http_webserver example script to control the GPIO pins.

Example usage

• To make pin 2 output and switch it on, send get request to http://ip-address-of-nodemcu/write/2/on
• To read from pin 2 with PULL_UP, send get request to http://ip-address-of-nodemcu/read/2?pull=up
• To measure from dht, http://ip-address-of-nodemcu/measure/2 (Returns two number separated by a comma)

To Do

• Return json instead of text
• Confirm if the read process is not errenous

Just so that I remember what I did

• Connect to nodemcu using picocom or micropython webrepl
• After nodemcu boots up, it will run boot.py followed by main.py
• You can send files to nodemcu as well using webrepl
• I have a raspberry pi zero which runs a single page webpage which sends ajax calls to this nodemcu
• since the pi zero runs pihole as well, i've set it up such that it runs on port 5000
• the webserver will start as soon as the pi zero is started (crontab @reboot)