Building a F.A.R.T. (Flow and Return Temperature) Sensor using ESPHome
Follow along as I build a Flow and Return Temperature (F.A.R.T.) sensor for my boiler using the ESPHome platform and two thermistor clamps. I add the sensor into Home Assistant where I can track and monitor my boiler's flow and return temperatures. Useful if you want to understand your boiler's behaviour!
My ESPHome yaml file is available on Github
https://github.com/tomasmcguinness/en...
You'll find lots of information about ESPHome on the website
https://esphome.io/index.html
Parts list:
2 x 10kOhm resistors
https://www.bitsboxuk.com/index.php?m...
1 x Seed XIAO ESP32-C3
https://www.digikey.co.uk/short/dc3ddb12
2 x ATC Semitec 103FT-7Y045
Picked from up eBay
If you're interested in the other thermistors I showed, with the black adjustable strap, their part number is: TT0P-10KC3-T105-1500
13 Dec 2024:
I've started work on a new version of this sensor, which uses Zigbee instead of WiFi. I've written up a post detailing the process - http://tomasmcguinness.com/2024/12/09...
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Video Notes:
Clip Champ gave me some headaches this time around. One of my screen recordings had no audio!! I had to do it all again :( Really starting to get annoyed at the varying volume levels across the different segments, so I will be spending some time investigating how to better manage that.
Timecodes:
0:00 Introduction
0:11 Intro to ESPHome
0:30 Choosing temperature probes
6:15 Possible MCUs
9:15 Breadboard setup
15:23 Setting up the flow sensor with ESPHome
36:18 Adding sensor to Home Assistant
39:14 Setting up the return sensor
44:22 Connect to the boiler
47:28 My mistake!
51:18 Wrapping up