I'm using an I2C splitter to connect more sensors on my pixhawk. When I only connect my external compass to the I2C splitter Mission Planner gives no error. When I connect my optical flow sensor, sonar and external compass I get the error compass variance and compass inconsistent. Does anyone knows what the problem is? I use Copter-3.3.
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I have exact same issue too.
Stijn, did you find to solove this?
Does this happen on USB only or with the battery connected? I found that too many things on the I2C bus while powering with only USB caused this for me. Once hooked up to the battery all of the problems went away.
No it happens also when I connect the battery. The first error I always get is preArm: rangefinder check, normally you have to lift your vehicle 50cm above the ground because the autopilot needs to check if the sonar is of good quality. If I do this the next error I get is compass variance. When I disable the preArm check of the rangefinder the problem is solved and there is also no compass variance error.