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ONEWIRE(4) Device Drivers Manual ONEWIRE(4)

onewire
1-Wire bus

onewire* at gpioow?
onewire* at uow?
onewire* at ioc? (sgi)
onewire* at xheart? (sgi)

option ONEWIREVERBOSE

1-Wire bus was originally developed by Dallas Semiconductor for connecting integrated circuits. It is commonly used for connecting devices such as electronic keys, EEPROMs, temperature sensors, real-time clocks, security chips, etc.
The onewire driver provides a uniform programming interface layer between 1-Wire master controllers and various 1-Wire slave devices. Each 1-Wire master controller attaches a onewire framework; several slave devices can then be attached to the onewire bus.
The driver supports plugging and unplugging slave devices on the fly.

gpioow(4)
1-Wire bus bit-banging through GPIO pin
ioc(4)
IOC3 generic workstation I/O device
uow(4)
Maxim/Dallas DS2490 USB 1-Wire adapter
xheart(4)
Octane core system widget

owctr(4)
1-Wire counter device
owid(4)
1-Wire ID device
owmac(4)
1-Wire Ethernet address
owsbm(4)
1-Wire smart battery monitor device
owserial(4)
1-Wire serial number
owtemp(4)
1-Wire temperature device

intro(4)

The onewire driver first appeared in OpenBSD 4.0.

The onewire driver was written by Alexander Yurchenko <grange@openbsd.org>.
July 16, 2013 OpenBSD-5.6