TIPS / inconsistent compass GPS PROBLEMS NAVIO2

Navio / Edge Hardware
1

Hello Everyone.

Few days a go I had many problems to work NAVIO2 with RPI3 and would like to share my experience with you.

I bought the basic kit and the extra antenna (Tallysman multi-GNSS antenna).

When I tried to use the antenna that came with the basic kit (GPS / GNSS antenna MCX) I identified a defect I “poor signal” which caused the message “inconsistent compass” in Mission Planner "related to GPS.

I decided to perform the replacement of the MCX antenna by Tallysman and messages began to appear with less frequency, but after that I have many problems with GPS HDOP because this antenna could not capture necessary signals in my area even in the open and I had to improvise.

What did I do ?

I developed GPS Shield Board Signal Gain according to the photo below, but the same can be done using a copper surface to accommodate the GPS.

IMG_20160922_073400876_HDR.jpg4160×2340 1.7 MB

Below are some results:

Before application of the Shield

Satellite Location
Urban Areas: 4
Rural areas: 9

After application of Shield

Satellite Location
Urban areas: 14
Rural areas: 21

After this modification, this antenna receives signals inside my apartment ( 5 satellites ) remembering that I live in a 16 floors building at the 13th floor.

I would like to thank George for all the support given to this problem without it would be impossible. Your help is priceless.

Best Regards

Fabio

2

The problem here is the unshielded Raspberry Pi camera, not the lack of a ground plane. It is a well known source of noise for GPS.
By adding a ground plane you are reducing some of it, but shielding the cable and the camera is a correct way. Ground plane is a good addition anyway.

3

Thanks!