Flywoo GN 745 nano compass issues

ArduCopter Copter 4.3
1

I’ve had parts laying around to build a Flywoo Explorer lr 4" for a while. I picked up the Flywoo GN 745 flight controller and a BN-880 GPS with dual compass. I was able to get the BN-880 soldered on to the flight controller. I connected the GPS and my radio as outlined on this page and have read through this post as well as this one. When I powered up the flight controller I saw input from my radio and was able to aquire some satelites. However the compass didn’t seem to work. What steps do I need to take to figure out if I have connected it correctly or if this setup should even work?

Additionally I’d like to figure out how to connect the VTX (a flywoo hm600) in a way to be able to change the channels and output power via my transmitter or mission planner.

Any input or suggestions would be appreciated!

Have a good day

2

Even though they are in the same module, the compass is a separate sensor to the GPS and is connected through the i2c (SDA and SCL) pins. Did you also connect those?

3

@Cam3n thanks for the response. I did connect them to the sda and scl pins (the two square pads on the right side nearest the rear mounting hole).

4

Ok good and, unlike the rx and tx pads, the SCL should go to the SCL and SCA to the SCA. After that, ardupilot should auto detect the compas.

5

That’s the issue though that it’s not seeing the compass. Would the next step be to reverse the scl and sda lines to see if I misread the info off the data sheet?