Let's talk creative uses for temperature and humidity sensors

[ogiewon]

@jnosa899

AC diagnostics - My AC has been having troubles. I placed a temp sensor directly in my vents too see the temp that the AC is pumping out. Surprised it was only 63 degrees. The coil was freezing up and the HVAC company said I had plenty of refrigerant but I would need to replace my entire A Coil. ($2500 USD) Turns out the coil and outside unit needed a good cleaning and my new air filters were too restrictive. Cost to me to fix it, $5 sensor, $3 filter, asked a little time with the garden hose.

Very nice! That is a great use of temperature sensors!

I built a custom HubDuino ESP8266 solution to add instrumentation to my HVAC Heat Pump. It has 4 DS18B20 temperature sensors to monitor incoming and outgoing air temperatures, as well as high and low pressure refrigerant line temperatures. It also monitors temperature and humidity in my attic, as well as a moisture sensor in the condensate drip pan. It also monitors the thermostat signal wiring, so that I know exactly what the thermostat is actually calling for (I.e. heat or cool, fan on or off, emergency heat strips, etc…)

[Release] HubDuino v1.1.9 - Hubitat to Arduino / ESP8266 / ESP32 / ThingShield Integration (ST_Anything)

At this point in time, assuming you're wanting to use WiFi for connectivity, I would recommend using an ESP32 based microcontroller as they offer ample GPIO pins. I recently purchased this combination from Amazon as I really like the form-factor of the screw-down terminal blocks. https://www.amazon.com/gp/product/B087TP5471 https://www.amazon.com/gp/product/B087P9KGF1 I actually built a custom board to monitor (not control) my HVAC Heat Pump. It monitors the 24VAC signal wires from the the…

This data has definitely helped me to identify issues with my heat pump, and to get those resolved before total system failure.