4-20mA Liquid Level Transducer and NodeMCU YAML Calcuations

[teich]

also using a similar setup. Here’s a thread from 3 years ago on it:

ESPHome water level sensor

The DFRobot website isn’t 100% clear - the throw in liquid level transmitter comes with the current to voltage converter. Click on the ‘shipping list’ on the right side of the page. The ESPHome code couldn’t be easier. Here is my config One note on wiring - you need both a 24V power supply (for the sensor) and a 3.3/5V supply (for the ESP). You could of course step down the 24V or up the 3.3. In my case I just used an old POE injector lying around and a USB for the ESP.

Includes my YAML as well.