hythygtemp
—
Driver for IST-AG HYT-221/271/939 sensor chip via I2C bus
hythygtemp* at iic? addr 0x28
The hythygtemp
driver provides measurements from the
HYT-221/271/939 humidity/temperature sensors via the
envsys(4) framework. The
hythygtemp
addr argument selects
the address at the iic(4) bus. The
sampling interval can be changed through the
sysctl(8) node
hw.hythygtemp0.interval
.
The sensor chips can be reconfigured to respond to other addresses
than the default value of 0x28 by external utilities, like for example the
pkgsrc/sysutils/hytctl package.
The following sysctl(3) variables
are provided:
- hw.hythygtemp0.interval
- Defines the sensor's sampling interval in seconds. It defaults to 50
seconds.
The hythygtemp
driver first appeared in
NetBSD 7.0.
The hythygtemp
driver was written by
Frank Kardel
<kardel@NetBSD.org>
and Frank Wille ⟨phx@NetBSD.org⟩.