We will use a Triple Axis Magnetometer Breakout - HMC5883L to detect magnetic field at the payload's location during its flight. The magnetometer provides a digital signal representative of magnetic in three axes, and must be provided with 2.16V to 3.6V.
We used the setup below to test the magnetometer. We uploaded code to put the data from the magnetometer out through the serial monitor, and found that the sensor is responsive to the presence of refrigerator magnets.
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