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Review on Comimark QMC5883L Compass Magnetometer Arduino by Ricky Habbani

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Not HMC but QMC for Computer Components

You are not HMC5883L! So if you use the libraries for the HMC you will get a random (noise) direction. Once you use the QMC libraries the result looks ok. But they are not HMC5883. Look at the markings on the chip.

Pros
  • This is GY-273 HMC5883L 3V-5V Three-Axis Compass Magnetometer Sensor Module for Arduino (Power: 3-5V)
Cons
  • Crumpled