Xiaomi seems to have a newer type of BLE temperature sensor, that is very cheap. I purchased a bundle of 4 for less than €13 at a well-known Chinese webstore. It is quite a bit more compact than the original one and works from a coin cell battery. Unfortunately it does not seem to work at this moment with the mitemp_bt integration. It makes itself known by “LYSWSD03MMC” which is different than “MJ-HT-V1” and for me already an indicator of trouble. I added its MAC address to the configuration ya
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