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  • The adafruit code appears to actually connect to the thermometer rather than just looking at advertisements, so I don't know how useful that is.

    That's because data in advertisement is encrypted, see https://github.com/Magalex2x14/LYWSD03MM­C-info#encryption When connected there is no such encryption! And any device can connect without pairing so it all makes very little sense.

    That's why I suggested alternative firmware - there is no such encryption nonsense there. And the firmware was developed from scratch (with Telink SDK available on github) and is opensource.

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