Description : Using a magnetometer can be a little tricky, especially if you are unsure about the formulas to use to get the correct bearing and when other magnetic objects are interfering with your signal. You could download a arduino library for this module, which will also be compatible with other HMC5883L breakout boards made by other manufacturers.
Electronic Feature : 1. Immersion Gold PCB, machine welding process to ensure quality. 2. Name: HMC5883L module (three-axis magnetic field module). 3. Use the chip: HMC5883L. 4. Power supply: 3V ~ 5V. 5. Communication modes: standard IIC communication protocol (3.3V~5V TTL). 6. Measuring range: 1.3-8 Gauss. 7. Size: 14mm x 13mm