Maxim(Dallas) 1(One)-Wire Thermometer (DS1820/DS18S20/DS18B20)
File:TArduinoDS18x20Thermometer.png
Summary
Digital thermometer using Maxim (Dallas) 1-Wire protocol. Supports DS1820, DS18S20, and DS18B20 sensors with configurable resolution and alarm thresholds.
Description
The DS1820/DS18S20/DS18B20 family of digital thermometers communicates using the Maxim 1-Wire protocol. They provide precise temperature measurements with programmable resolution and alarm limits. Multiple devices can share the same bus, and auto-discovery simplifies setup. Temperatures can be reported in Celsius or Fahrenheit.
Diagram:
Properties
- Address – Unique 64-bit ROM code of the device, split into Octet1–Octet8 (default: 00-00-00-00-00-00-00-00).
- Alarm High Temperature – Upper temperature threshold for alarms (default: 100°C).
- Alarm Low Temperature – Lower temperature threshold for alarms (default: 0°C).
- Auto Discover – Boolean, automatically scans the 1-Wire bus for devices.
- In Fahrenheit – Boolean, outputs temperature in Fahrenheit.
- Resolution – Measurement resolution (default: 12-bit).
Pins
Input Pins
- Clock – Clock input for timing.
- One Wire – Data line for 1-Wire communication.
Output Pins
- Out (analog) – Analog output representing temperature.
- Address – Outputs detected 64-bit ROM address.
- Alarm (digital) – Digital output indicating alarm condition.
- One Wire – Shared 1-Wire communication pin.
Categories
- File:TArduinoSensorCategory.png Category Sensor – Temperature sensors.
- File:TArduinoDigitalCategory.png Category Digital – Digital signal devices.
- File:TArduinoAnalogCategory.png Category Analog – Analog output components.
- File:TArduino1WireCategory.png Category 1-Wire – 1-Wire interface devices.
