I am having issues with heading data, so i wanted to use external compass for that, is there any specific compass i need to buy or any USB based compass will work fine as i will connect it to PI4. BTW i am considering to buy Rion HCM375B-232-68-N.
secondly, which of the below will provide that USB compass data and it will be helpful if someone explain these and whats difference b/w them.
11. GPS Heading, 12. Compass Heading (if available), 13. Main Heading Sensor Used ("GPS"/"Compass"),