Compass QMC5883/GY-271(I2C)

File:TArduinoQMC5883GY271CompassI2C.png

Summary

QMC5883/GY-271 3-axis digital compass with I²C interface for measuring magnetic fields in milligauss (mG) and optional onboard thermometer.

Description

The **QMC5883/GY-271 Compass** measures X, Y, and Z components of the magnetic field with high resolution. It supports configurable full-scale range, oversampling ratio, and sample rate. An optional onboard thermometer can report temperature in Celsius or Fahrenheit, with an adjustable offset. The sensor communicates via I²C and provides an overflow digital output for out-of-range measurements.

Diagram:

Properties

• Enabled – Enables or disables the sensor.
• Full Scale Range (Gauss) – Measurement range (default 2 Gauss).
• Over Sample Ratio – Oversampling rate (default 64).
• Sample Rate (Hz) – Frequency of measurements (default 200 Hz).
• Thermometer – Onboard temperature sensor:
  • Enabled (boolean)
  • In Fahrenheit (boolean)
  • Offset (default 37)
• Address – I²C device address.

Pins

Input Pins

• Reset (clock) – Resets the sensor.
• Clock – Sampling clock input.

Output Pins

• X (mG) – X-axis magnetic field in milligauss.
• Y (mG) – Y-axis magnetic field in milligauss.
• Z (mG) – Z-axis magnetic field in milligauss.
• Thermometer Out (analog) – Temperature output from onboard thermometer.
• Out (i2c) – I²C communication interface.
• Overflow (digital) – High when magnetic measurement exceeds range.

Categories

• File:TArduinoDigitalCategory.png Category Digital – Digital sensor components.
• File:TArduinoI2CCategory.png Category I2C – I²C-enabled devices.
• File:TArduinoSensorCategory.png Category Sensors – Magnetic and orientation sensors.