No compass calibration For LSM9DS1 (BerryIMU V2) - Printable Version +- OpenMarine (https://forum.openmarine.net) +-- Forum: OpenPlotter (https://forum.openmarine.net/forumdisplay.php?fid=1) +--- Forum: General discussion (https://forum.openmarine.net/forumdisplay.php?fid=2) +--- Thread: No compass calibration For LSM9DS1 (BerryIMU V2) (/showthread.php?tid=2621) |
No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-06-03 I am having trouble getting the LSM9DS1 IMU to calibrate. The device is in a fixed location on the boat and even though the boat movement is significant the calibration still says there is insufficient data to calibrate. If I look in OCPN, the boat direction is different than GPS direction and if I offset, the next time I look at it it will be wrong again. Previously Sailoog stated that this sensor had not been added yet, is this a big job or is there another IMU I should add that is supported? RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Sailoog - 2020-06-04 Recently I have been doing some test with the LSM9DS1 and I have been able to calibrate correctly. You have to be sure to run the latest version of OpenPlotter Pypilot app and follow the instructions to calibrate: https://openplotter.readthedocs.io/en/latest/pypilot/calibration.html The LSM9DS1 has better compass than the mpu9250/mpu9255 but worse accelerometer so it is important you pass the step 1 "Accelerometer bias". I am interested in your result, report please. RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-06-05 I will be at the boat tomorrow evening, I will see if I can calibrate using those instructions. I did not calibrate the accel page last time. RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-06-07 Got to the boat this morning, it is a bit wavy but I tried to calibrate and was successful (I believe). Here is a pic of the accel calibration page The compass is calibrated in 2D only, I am still on the mooring, I will check this again later after I have been sailing RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Sailoog - 2020-06-16 Any news on this? RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-06-16 (2020-06-16, 07:21 PM)Sailoog Wrote: Any news on this? Yes, doesn’t seem to have worked, the IMU compass heading and gps compass heading vary massively and not consistently - for instance we will be sailing a steady course and the IMU compass will be off by 90degrees, then I would change the offset to align them and later in the day they would be offset again. I will be on the boat again tomorrow and will get more info and examples of this RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-06-18 I was at the boat today and took some pictures of the alignment, accel and compass pages on the accel page the calibration was from the 6 side box exercise I did a couple of weeks ago. On the compass page it seems I am getting some calibration but perhaps not 3D, some of the earlier text said 2D fit. on the alignment page the heading was completely wrong so I adjusted it to match the boat compass RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-07-01 I spent some time doing different points of sail in order to calibrate the compass but keep getting 2D fit only and a message saying calibration is the same as previous. [img]webkit-fake-url://67E2245B-A600-430B-A0E5-5577E9214CF6/imagepng[/img] RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Sailoog - 2020-07-01 I can not see your latest image. Some ideas: - It seems that the LSM9DS1 have worse gyros and needs a good accel calibration - Do you have any strong magnetic interference? speakers, cables with high current... RE: No compass calibration For LSM9DS1 (BerryIMU V2) - Techstyle - 2020-07-01 Let me know if you can see attachment I will try to move the sensor to another location and see if that helps |