---
name: "ow"
section: "4"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://carta.tech/man/ow/4"
---

# ow(4)

Dallas Semiconductor 1-Wire bus

## NAME

**ow** – Dallas Semiconductor 1-Wire bus

## SYNOPSIS

**device** **ow**

## DESCRIPTION

The **ow** module implements the Dallas Semiconductor 1-Wire bus. It attaches to the [owc(4)](/man/owc/4.md) driver, which implements the low-level signaling of the 1-Wire bus.

## SEE ALSO

[ow\_temp(4)](/man/ow_temp/4.md), [owc(4)](/man/owc/4.md), [owll(9)](/man/owll/9.md), [own(9)](/man/own/9.md)

## LEGAL

1-Wire is a registered trademark of Maxim Integrated Products, Inc.

## HISTORY

The **ow** driver first appeared in FreeBSD 11.0.

## AUTHORS

The **ow** device driver and this manual page were written by Warner Losh.