---
name: "bcmtmon"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/bcmtmon"
---

# bcmtmon(4)

Broadcom BCM2711/BCM2712 temperature monitor

## NAME

**bcmtmon** – Broadcom BCM2711/BCM2712 temperature monitor

## SYNOPSIS

**bcmtmon\* at fdt?**

## DESCRIPTION

The **bcmtmon** driver provides support for the temperature sensor found on the Broadcom BCM2711/BCM2712 SoC that is used in the Raspberry Pi 4/5.

Sensor values are made available through the [sysctl(8)](/sysctl/8.md) interface.

## SEE ALSO

[intro(4)](/intro/4.md), [sensorsd(8)](/sensorsd/8.md), [sysctl(8)](/sysctl/8.md)

## HISTORY

The **bcmtmon** driver first appeared in OpenBSD 6.8.

## AUTHORS

The **bcmtmon** driver was written by Alastair Poole ⟨*netstar@gmail.com*⟩.