Nice accessory. I've started using ESP32 boards lately because they're $4! They have WiFi and work with micro amps of power making ideal for battery power.
There's an amazing amount of hobbyist stuff out there these days.
I actually started using the ESP8266 on a series of projects to create a cheap, throw-it-anywhere temp/humidity sensor system. Then I found out they are very noisy around the 320MHz area, which is the same region some garage door openers and older home automation systems work with. One device was enough to overload my garage door opener and I had to reconsider my options.
Interesting. I was planning to use the ESP32 to read a 433MZh receiver for alarm sensors. That will suck .
The noise I was seeing was very localized to that one area, you may be ok with 433MHz.
The frequency I'm using is usually limited to things like old X10 command systems and commercial openers (and openers made for consumers by those same companies.)
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