<![CDATA[AtomS3R bmm150 magnetometer readings]]>I'm getting really bad magnetometer readings from AtomS3R bmm150
using m5stack libraries.

atan2(mag.x, mag.y) should give some reasonable result in radians.

However I do not see it being even close.

My code:

https://github.com/bareboat-necessities/bbn-atomS3R/blob/07bdf3e322c907e398563786f0af95e70cd635ac/bbn_atomS3R_mahony/bbn_atomS3R_mahony.ino

I think there is a bug in m5stack unified library which reads that sensor.

Thanks,

]]>https://community.m5stack.com/topic/7254/atoms3r-bmm150-magnetometer-readingsRSS for NodeWed, 29 Apr 2026 00:41:10 GMTSun, 02 Feb 2025 01:53:52 GMT60<![CDATA[Reply to AtomS3R bmm150 magnetometer readings on Fri, 02 May 2025 08:35:17 GMT]]>@mgrouch I can use the M5Unified library to read a reasonable readings from the BMM150. Yet have to work on the orientation. In my case I have to invert the X-axis value and Z-axis value and able to calculate into a tilt-compensated headings

]]>https://community.m5stack.com/post/29021https://community.m5stack.com/post/29021Fri, 02 May 2025 08:35:17 GMT<![CDATA[Reply to AtomS3R bmm150 magnetometer readings on Tue, 04 Mar 2025 00:58:22 GMT]]>@proTartareSauce

m5stack code for calibration is very primitive. It doesn’t do sphere fit. That’s the issue I had

]]>https://community.m5stack.com/post/28383https://community.m5stack.com/post/28383Tue, 04 Mar 2025 00:58:22 GMT<![CDATA[Reply to AtomS3R bmm150 magnetometer readings on Sun, 02 Mar 2025 21:29:50 GMT]]>Hi there, I'm using an M5core2 with the GNSS module and getting really strange readings form the bmm150 as well. Did you find a fix ?

Best,

]]>https://community.m5stack.com/post/28376https://community.m5stack.com/post/28376Sun, 02 Mar 2025 21:29:50 GMT