Comments

• 

  Tony Wall May 29, 2016 at 7:40am

  By the way this GPS unit is very good. It will run up to 10Hz in GPS mode and 3Hz in SBAS-DGPS mode. The only issue is that APM is unable to detect this device at speeds higher then 38k baud, so best leave the update RATE at 500ms (2Hz), The problem is with APM not the GPS, if you connect to a PC with u-Center you should get good results. Until the GPS issues are solved in the current APM (and there are, those horrible arm delay horiz/vert GPS errors still) it will force the GPS back down to 38k baud even after you successfully configure higher rates. You can't even disable auto detection in APM because if you do it doesn't bother detecting any GPS at all (doh).
• 

  Tony Wall May 29, 2016 at 7:36am

  You can derive the pin-outs of the GPS from the PixFalcon documentation here: http://www.pixfalcon.com/download/MICRO-PX4.pdf

  Page 4 GPS & I2C port.
• 

  Cala May 28, 2016 at 5:44pm

  the only thing that I found that wire is compatible with Pixfalcon and I found Pixfalcon  labels but 5v is in the middle and not the red one
• 

  Cala May 28, 2016 at 5:41pm

  I opened but anything :(
• Craig May 28, 2016 at 5:10pm

  Guys, someone have this micro gps m8n from Hking?http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=...

  I need diagram connections and I can't find and nothing write on the board :( , I only find that red isn't 5v .I'm afraid to burn it. (is for connect to a Pixracer) 

  open the case, the board should have the labels to which pin goes where.
• 

  Cala May 28, 2016 at 4:00pm

  Guys, someone have this micro gps m8n from Hking?http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=...

  I need diagram connections and I can't find and nothing write on the board :( , I only find that red isn't 5v .I'm afraid to burn it. (is for connect to a Pixracer) 
• Paul N Braida M.E April 18, 2016 at 6:30am

  both boards have a 3DR stamp on the bottom and used to work. Now the one will upload and verify the firmware but not connect to Mavlink and the other will not upload firmware or anything. Both boards are receiving the required 3.3 volts.

  I don't know, maybe just scrap the boards?

  3DR do not seem to want to help me on this. Maybe I will forget APM and go with the NAZA controller. 
• Developer

  Randy April 13, 2016 at 5:14pm

  @PaulNBraida,

  Maybe try loading Plane onto the broken boards?  It's possible (if you're not using a 3DR APM) that the last copter firmware meant for the AVR boards doesn't fit on it because the manufacturer has put a bootloader that's slightly too large on it.

  Also even though you can't connect via MAVLink you should still be able to upload firmware.  The issue is that Mission Planner (I assume this is what you're using) needs to first recognise the board (so it can get the correct firmware) and then it needs the board to be in bootloader mode to actually upload the firmware (the board is in bootloader mode for the first few seconds after being powered).  This means you might need to mess around a bit, connecting and disconnecting the board at the appropriate times.  I.e. plug in the board, push the MP's firmware upload button, disconnect and reconnect the board.
• Paul N Braida M.E April 13, 2016 at 8:36am

  I still need help with my two APM 2.5. On one I can upload and verify firmware but it times out connecting to Mavlink. Error no heartbeat packets received. The other APM cannot upload firmware or connect. It has the same error. The port & baud are set ok. While counting down trying to connect I can see the small amber LED flashing slowly. Voltage on the outside pins of IC 2 is ok. I changed the volt regulator.

  I'd really like to use these controllers, not just junk them.

  Thanks
• Chris Leech April 10, 2016 at 7:01pm

  ANother thing that happens is that unless you have some aluminum or kapton tape over the area you will probably blow the tiny caps and resistors off the PCB. And believe me, once they are gone, you are in a fix. Get a nice close up photo of this area to see what I mean. If you need some, I can post a few of one (APM2.6) that I am working on.