| HYTHYGTEMP(4) | Kernel Interfaces Manual | HYTHYGTEMP(4) | 
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.
 
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>.