GY-271 / HMC5883L 3-Axis Magnetometer Module

Description

This 3 axis digital compass is based on Honeywell HMC5883L sensor.The magnetometer or digital compass sensor is used to measure the heading angle (angle from the north), This is done by measuring both the direction and the magnitude of Earth’s magnetic fields, from milli-gauss to 8 gauss. Communication with the HMC5883L is simple and all done through an I2C interface. Voltage of 2.16-3.6VDC should be supplied. Features Simple I2C interface 2.16-3.6VDC supply range Low current draw 5 milli-gauss resolution Dimensions: 17.78x17.78mm How to use compass with arduino? Connect the compass as shown in figure below Upload and run this arduino code, click here Note: for the code above, the connections MUST be : Arduino GND ---------> HMC5883L GND Arduino 3.3V ---------> HMC5883L VCC Arduino A4 (SDA) ---> HMC5883L SDA Arduino A5 (SCL) ---> HMC5883L SCL For another tutorial on how use triple axis digital compass, please click here Watch how to use video below