This is a custom firmware for Wemos D1 (Arduino, esp8266) to act as a water level sensor with a web UI and HTTP API to access current readings ...

This is a custom firmware for Wemos D1 (Arduino, esp8266) to act as a water meter (water level sensor) with a web UI and HTTP API to access current reading.

We connected $\\mathbf{p H}$ sensor and solar cell into Arduino Board to control data transmission via red laser communication or popular known as visible light communication (VLC). The sensor was ...