Discussions

Upgraded Mag Compass from HMC 5843 to HMC 5883L . 

To verify the the 5883L was a good unit,  I ran the Compass Library test program comparing the 5843 to the 5883L . Both the 5843 & 5883L reported about the same number (~ 180) for a heading of South.

Next I installed the 5883L and did a Upload with Arduino and complete software setup with planner including eeprom erase.  With the 5883L installed, South(180 degrees) now displays as 145 degrees.

In config.h, under //  MAGNETOMETER. I found :

# define MAG_PROTOCOL  MAG_PROTOCOL_5843  // Default Setting.

I changed that to :

# define MAG_PROTOCOL  MAG_PROTOCOL_5883L.

Again did a Arduino software upload and  planner setup including eeprom erase. This did not work, compass reports 60 degrees instead of 180.

Last test was to remove all # define MAG_PROTOCOL leaving :

#ifndef MAG_PROTOCOL

#endif

Compass displays 145 degrees instead of 180.

Just reporting the problem.

Max_Crash