pi1wire

pi1wire is a library for the Raspberry PI 1Wire sensor.

Quick Sample

Here is a simple usecase.

from pi1wire import Pi1Wire, Resolution

for s in Pi1Wire().find_all_sensors():
    print(f'{s.mac_address} = {s.get_temperature():.3f}')

    s.change_resolution(Resolution.X0_5)
    print(f'{s.mac_address} = {s.get_temperature():.3f}')

OS Environment

(For Raspbian OS) Enable 1wire in raspi-config.

$ sudo raspi-config nonint do_onewire 0

API

Pi1Wire

This is a class that looks for sensors.

find_all_sensors() -> List[OneWire]

Get a list of OneWire instances.

find(mac_address: str) -> OneWire

Get a OneWire instance of the specified MAC address.

find_all_and_change_resolution(resolution: Resolution, use_sudo: bool = True) -> List[OneWire]

Change the resolution of all sensors found and get them as a list of OneWire instances.

The executing user must be able to use sudo. If the executing user has root privileges and does not need sudo, set the use_sudo option to False.

OneWire

This class controls the sensors.

mac_address

The MAC address property of the sensor.

get_temperature() -> float

Get the temperature.

change_resolution(resolution: Resolution, use_sudo: bool = True) -> None

Change the resolution of the temperature sensor.

Depending on the Resolution definition, change to a resolution equivalent to increments of 0.5°C, 0.25°C, 0.125°C, or 0.0625°C.

The executing user must be able to use sudo. If the executing user has root privileges and does not need sudo, set the use_sudo option to False.

Resolution

An enumeration that defines the resolution setting values.

X0_5

Resolution is set at 0.5°C.

X0_25

Resolution is set at 0.25°C.

X0_125

Resolution is set at 0.125°C.

X0_0625

Resolution is set at 0.0625°C.

Change Log

0.3.0

• Added function to change resolution.
• Fixed so that the order of sensor detection does not change depending on the file system.

0.2.0

• Added check for PowerOnResetValue.

0.1.0

• Initial release.

License

MIT