ds18b20

Documentation

Overview

Package ds18b20 provides a driver for the DS18B20 digital thermometer

Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/DS18B20.pdf

Index

• Constants
• type Device
  • func New(owd OneWireDevice) Device
  • func (d Device) Configure()
  • func (d Device) ReadTemperature(romid []uint8) (int32, error)
  • func (d Device) ReadTemperatureRaw(romid []uint8) ([]uint8, error)
  • func (d Device) RequestTemperature(romid []uint8)
  • func (d Device) ThermometerResolution(romid []uint8, resolution uint8)
• type OneWireDevice

Constants

const (
	CONVERT_TEMPERATURE uint8 = 0x44
	READ_SCRATCHPAD     uint8 = 0xBE
	WRITE_SCRATCHPAD    uint8 = 0x4E
)

Device ROM commands

Types

type Device

type Device struct {
	// contains filtered or unexported fields
}

Device wraps a connection to an 1-Wire devices.

func New

func New(owd OneWireDevice) Device

func (Device) Configure

func (d Device) Configure()

Configure. Initializes the device, left for compatibility reasons.

func (Device) ReadTemperature

func (d Device) ReadTemperature(romid []uint8) (int32, error)

ReadTemperature returns the temperature in celsius milli degrees (°C/1000)

func (Device) ReadTemperatureRaw

func (d Device) ReadTemperatureRaw(romid []uint8) ([]uint8, error)

ReadTemperatureRaw returns the raw temperature. ScratchPad memory map: byte 0: Temperature LSB byte 1: Temperature MSB

func (Device) RequestTemperature

func (d Device) RequestTemperature(romid []uint8)

RequestTemperature sends request to device

func (Device) ThermometerResolution

func (d Device) ThermometerResolution(romid []uint8, resolution uint8)

ThermometerResolution sets thermometer resolution from 9 to 12 bits

type OneWireDevice

type OneWireDevice interface {
	Write(uint8)
	Read() uint8
	Select([]uint8) error
	Сrc8([]uint8, int) uint8
}