I am desperate for ideas

[aaron]

Take a look here:

[PROJECT] Salt Tank monitor using Arduino & MQTT

Hello all, This was inspired by Dr. Zzz's YouTube video on how he added a Wemo D1 with a Ultrasonic Sensor (HC-SR04) to his Hass.io system to monitor salt level in his water softener. In order to make this work in Hubitat and use my RPi Mosquito MQTT Broker. I use Hubitat's MQTT Client connectivity to read and display the Salt Tank level. I wanted to use a NodeMCU for the Arduino but unfortunately the HC-SR04 requires 5v to operate and the NodeMCU I have only has pinouts for 3.3v. So now usi…