It's a bit of a funny device, it uses 2 DS2406s that synthesize 3-wire communication with a MS5534 pressure sensor.
The primary DS2406 stores it's sibling's address in EEPROM. The MS5534 stores calibration data that is extracted and cached after the first invokation.
Properties are available under the 12.1234134134/TAI8570 subdirectory: sibling(address), temperature(C), pressure(millibar). If the DS2406 isn't the primary switch in the device, reading properties will be unsuccessful.
Paul Alfille
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