Sept 11 update - latest ETA is now October 1st.

esphome-pressure

This is a custom device for reading differential pressure. The most useful example I can think of is monitoring your pressure drop across your air filter. This is a great way to know when to change your filter. It also has a 3-pin screw terminal to connect as many 1-wire Dallas temperature sensors as you want! It will fit inside a Hammond case for a professional looking installation.

It is based on an ESP32-C3-MINI, which has native USB-C for flashing.

This specific board has a sensor that can handle +/- 0.5kPa, which is about 2" of pressure drop. Most HVAC systems are designed to have a pressure drop of 0.1" (0.025kPa).

What's included

A fully populated PCB and screw terminal headers. The case is NOT included.

More info

For simplicity, the rest of the information can be found at the project webpage - https://github.com/gcormier/esphome-pressure