[Owfs-developers] Barometric Pressure (TAI8570) support

[Paul A. <pau...@gm...>]

Thanks to the permission and kind assistance of Aitor Arrieta of AAG
Electronica (aag.com.mx) and Dr. Simon Melhuish (http://oww.sf.net) we have
full support for the DS2406-based TAI8570.

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