OneWire Thermometer

Digital temperature sensor using 1-Wire protocol.

Overview

This bundle provides integration with OneWire (1-Wire) digital thermometer sensors. The component reads temperature values from DS18B20 or similar OneWire temperature sensors connected to the system via a OneWire bridge.

OneWire thermometers are low-cost, accurate temperature sensors useful for monitoring system temperatures in energy management applications such as battery thermal monitoring, ambient temperature sensing, or thermal load assessment.

Supported Devices

OneWire Digital Thermometers

  • Type: Digital temperature sensor

  • Protocol: 1-Wire

  • Common Models: DS18B20, DS1822, DS1820

  • Typical Use: Ambient monitoring, battery thermal monitoring, thermal load assessment

  • Accuracy: ±0.5°C typical

Components

This bundle implements the following OpenEMS Components:

OneWire Thermometer

Name: OneWire Thermometer

Factory-PID: OneWire.Thermometer

Implemented Natures/Interfaces

  • Thermometer

  • OpenemsComponent

Description: Interface for OneWire digital thermometer sensors. Reads temperature value from a specific 1-Wire device address. Multiple instances can be configured to read from different sensors on the same 1-Wire bus.

Configuration:

  • id (String): Component ID for unique identification (default: "temp0")

  • alias (String): Human-readable alias for the component

  • enabled (Boolean): Enable/disable this component (default: true)

  • bridge_id (String): ID of the OneWire bridge component (default: "onewire0")

  • address (String): Address of the specific OneWire thermometer device (required) - typically in format like "28.0000…​" or "10.0000…​"

Prerequisites / Dependencies

  • OneWire bridge component must be configured and running (e.g., onewire0)

  • OneWire thermometer sensor physically connected to the OneWire bus

  • Device address must be known (typically obtained from 1-Wire scanning tools)

  • OneWire interface accessible from the system

Features

  • Real-time temperature reading

  • Low-cost digital temperature measurement

  • Multiple sensors per bridge supported (configure multiple instances)

  • Pluggable Thermometer interface for integration with other components

  • Temperature accuracy to ±0.5°C

Source Code