NAME
hythygtemp —
Driver for IST-AG
HYT-221/271/939 sensor chip via I2C bus
SYNOPSIS
hythygtemp* at iic? addr 0x28
DESCRIPTION
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.
SYSCTL VARIABLES
The following
sysctl(3) variables
are provided:
-
-
- hw.hythygtemp0.interval
- Defines the sensor's sampling interval in seconds. It
defaults to 50 seconds.
SEE ALSO
envsys(4),
iic(4),
envstat(8),
sysctl(8)
HISTORY
The
hythygtemp driver first appeared in
NetBSD 7.0.
AUTHORS
The
hythygtemp driver was written by
Frank
Kardel
<
kardel@NetBSD.org>
and
Frank Wille ⟨phx@NetBSD.org⟩.