I've just received a 3DR GPS with compass module and I'm trying to hook it up to my APM2. I am a bit confused as to which connections I need to make and I was wondering if anyone could clarify this for me. I'm thinking of splicing the cables coming from the module to the pin headers on the APM2 but I can't find a pinout for the 6-pin GPS or the 4-pin compass connectors. The Eagle files in the store are still for the older GPS-only version of the module. I'd be very grateful if anyone of you could point me to the correct pinout for both connectors.
Also, according to the description in the 3dr store, the GPS/compass module has an onboard 3.3V regulator. Does that mean that I only need to provide the GPS with +5V (and don't run an additional +3.3V line from the I2C port on the APM to the compass?)
Replies
Ok, a bit of a strange one.
I've got the new HK mini version, and somewhat annoyingly, you need to use a 4 way DF13 to the 6 way on the new 2.6 3DR GPS/compass unit. You can see them on the left here, either side of the USB.
I've followed these instructions, and everything "looks" ok...I get full compass operation, I get the blue flashing light on the unit to signify GPS lock...but the HK mini doesn't seem to see the unit? The HK mini blue light just sits there flashing.
I tried swapping the tx and rx, and the HK unit just sits there, slowly cycling the green and blue LED's.
The wiring seems solid - + and GND work ok, afterall...but what voltages should I be seeing across rx and tx?
The 2.6 was lifted right out of an operating craft, so that's ok.
Edit: Scratch that - i'm talking b****xs again. It's all working now.
Likeseasons,
What version of the APM do you have? Is it just a 2.0 and not a 2.5/2.6?
The Arducopter Wiki will show you how to attach the GPS/ compass to all three versions of the APM: http://copter.ardupilot.com/wiki/common-installing-3dr-ublox-gps-co...
Regards,
TCIII Admin