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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Purple-Tentacle
Thanks for the hints, let me answer the questions. Sorry for not being specific enough.
I have a 11 sqm flat
Walls are pretty sick, I do not think BLE would make it
OpenHAB is running on a Pi using OpenHabian
I want to measure room air quality, no greenhouse
Maybe later on I want to measure things in an indoor terrarium as well
Maybe I have to go with LoRa.