Sensor
Honeywell（原版）/ QST（QMC5883L 兼容版）
HMC5883L / QMC5883L 3-Axis Magnetometer
Alias: HMC5883L 、 QMC5883L 、 magnetometer 、 electronic compass 、 geomagnetic sensor 、 3-axis magnetometer 、 I2C sensor
Specifications
Type 3-Axis Magnetometer (Geomagnetic Sensor)
Measurement Axes 3 axes (X / Y / Z)
Range ±8 Gauss (HMC5883L) / ±8 Gauss (QMC5883L)
Resolution 2 mGauss
Noise Density ~2 mGauss/√Hz
Interface I2C (up to 400 kHz fast mode)
I2C Address 0x1E (HMC5883L) / 0x0D (QMC5883L)
Operating Voltage 3.3V
Pin Count 5Pin (VCC, GND, SDA, SCL, DRDY)
Data Ready DRDY pin (optional, low = data ready)
Typical Applications Electronic compass, magnetic field detection, orientation sensing
Notes Most commercial modules use the QMC5883L clone. I2C address and registers differ from original HMC5883L. Run an I2C scan first to identify the chip.