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UPD(4) Device Drivers Manual UPD(4)

USB Power Devices sensor

upd* at uhidev?

The upd driver provides support for monitoring various sensors provided by USB Power Devices (such as a UPS). Supported sensor values are made available via the sysctl(8) interface.
The following sensors are supported by the driver:

intro(4), uhidev(4), sensorsd.conf(5), sensorsd(8), sysctl(8)
The USB Power Devices specification can be found at http://www.usb.org/developers/hidpage/

The upd driver first appeared in OpenBSD 5.6.

The upd driver was written by Andre de Oliveira.

The upd driver does not indicate device health via aggregate or individual sensor status. Users who wish to monitor upd status using sensorsd(8) must manually establish “high” and “low” limits for sensor values of interest via sensorsd.conf(5).
June 26, 2015 OpenBSD-current