you can do it all with node red and get power from 12v with a car cigarette lighter usb charger thingy.i would use wifi & mqtt instead of BT.
ESP32 user defined sensor
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ESP32 user defined sensor - by Hans - 2019-02-14, 06:08 AM
RE: ESP32 user defined sensor - by jim321 - 2019-02-14, 10:42 AM
RE: ESP32 user defined sensor - by ddelorme - 2019-02-20, 01:41 PM
RE: ESP32 user defined sensor - by jim321 - 2019-02-20, 03:10 PM
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