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| H A D | gpioths.c | diff ce508b364cea1ad6860a3cfcf0ad4f8d70ea7f16 Sun Dec 08 21:42:58 CET 2019 Ian Lepore <ian@FreeBSD.org> Add support for more chips to the gpioths driver.
Previously the driver supported the DHT11 sensor. Now it supports
DHT11, DHT12, DHT21, DHT22, AM3201, AM3202.
All these chips are similar, differing primarily in supported temperature
and humidity ranges and accuracy (and, presumably, cost). There are two
basic data formats reported by the various chips, and it is possible to
figure out at runtime which format to use for decoding the data based on
the range of values in a single byte of the humidity measurement. (which
is detailed in a comment block, so I won't recapitulate it here).
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