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Link to the forum posts with more info, and a link to the correct datasheet for the DA 5883.https://www.raspberrypi.org/forums/viewtopic.php?f...https://forum.arduino.cc/index.php?topic=476861.0
This does appear to be working.
It looks like you are on the right track. This is made by a different manufacturer than the Honeywell sensor, and has different registers.A bit of searching, and I found others with similar issues, and someone wrote a library for the IC marked with DA 5883.https://github.com/mechasolution/Mecha_QMC5883I have not tried this yet.
It looks like the digital compass uses 3.3V logic, and the Arduino Nano uses 5V. Could be why it isn't working very well.