Hi all,

I just start with this APM 1.4 2560 + MTK GPS. I have update the MTK firmware to the newer version.

But have some problem with the GCS. The flight version is ArduCopter 2.9.1 for X quad.

Here is the problem on GCS

It wouldn't ARM and the GPS aren't connect on this view. But if I go the "Terminal Tab"  and tests it, see like the GPS are connect well with 9 satellite

My APM works well with ArduCopter 2.6 earlier firmware, but the compass seem to reverse at the GCS True North it read South. and how to calibrate the Accel? If I update the ArduCopter 2.9.1 my radio wouldn't calibrate (not connect at all - no respond).

What is the problem? My OilPan? Or need to change the APM with 2.5?

And also the BMP085 are fail. It read the altitude -21474836.00 (at the field was 663)

I try to upload the ArduCopter 2.9.1 sketch with ArduPilot-Arduino-1.0.3 but the problem is variable or field 'Log_Write_Cmd' declared void . I read step by step at the wiki but still same result.

So anybody on this forum please help me out.

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Hi Have the same problem, so please, witch solutions do you find to work? 

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