pcfadc(4)

pcfadc4

Philips pcf8591 temperature sensor

Usage

pcfadc* at iic?

Overview

The pcfadc driver supports the PCF8591 I2C analog to digital converter, making its readings available through a sysctl(8) interface.

The driver reads up to four A/D lines configured as temperature inputs. Sensor names, type and calibration information are read from OpenFirmware.

Releases

43 releases since OpenBSD 3.9; the text changed 4 times.

  1. 3.9
  2. 4.0–4.1
  3. 4.2–4.6
  4. 4.7–5.3
  5. 5.4–8.0

History

The pcfadc driver first appeared in OpenBSD 3.9.

Authors

The pcfadc driver was written by Damien Miller ⟨[email protected]⟩.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.