PC doesn't recognize neither APM nor XBee

Hi all,

 

I appreciate any help on the following problem.

 

I purchased both ArduPilot Mega and 900 MHz telemetry kit from Diydrones a couple of months ago. I setted them up correctly according to the manual. Everything was working perfectly up to yesterday. Before second flight at the field, Mavlink doesn't connect to XBee module at the ground station. I ignored and made a succesfull flight with APM on the airplane. After the flight at home I tried unbricking xBee but problem persisted. Baud rate 57600. Only hours ago ago, Mavlink was connecting but now PC recognizes xBee and Mavlink doesn't connect. I tried also the Arduino test with special code written for this purpose suggested on the manual, no result.

 

I decided to check APM board. While still setted on the airplane, I tried to connect APM board via usb cable, this time laptop PC (Windows 7) even doesn't recognize the device at the usb port. I tried reloading Netframe to PC, tried introducing FTDI drivers to PC but resulted with nothing. Finally I dismounted APM board from the plane, connected to PC, nothing changed.

 

Interesting thing, with this setup, I made a succesfull flight yesterday, autopilot functions worked perfectly but I can not connect to PC to try further capabilities of APM.

 

When APM board connected to PC via USB port;

   * PC side "device not recognized" error,

   * APM IMU shield/Oilpan led status; Tx Rx yellow leds flashing for a second; then ABC leds flashing for 2-3 seconds; then yellow led lights solid. Blue power led lights sold.

   * APM (bottom) Board led status; Blue, red and yellow leds light solid (no RC connection, I removed the board from the plane)

 

Please help, what shall I do further.

 

Best,

 

İlhan  

Tags: APM, PC, board, by, not, recognized

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3D RoboticsPermalink Reply by Chris Anderson on August 28, 2011 at 12:03pm

Sounds like your USB connector on the IMU board has become dislodged. Check the solder pads. You can usually resolder them if one has come loose.

Permalink Reply by İlhan Başçuhadar on August 28, 2011 at 2:03pm

Solders are ok, but second pin of USB connector damaged!!! (see the picture) I fixed it and APM board is now functioning, PC recognized, MAVLINK connected.

 

Chriss, XBee ground board's problem still persists. PC recognizes but MAVLINK doesn't connect. I tried unbrick it, read it with X-CTU and attached picture of the read result to this mail. Do you have any comment? Only blue power led ligghts solid.

 

Thanks for your help. 

 

 

 


3D RoboticsPermalink Reply by Chris Anderson on August 28, 2011 at 4:31pm

Xbee looks good. Check the ground Xbee and make sure it matches. Also check that you're selecting the right Xbee COM port and baud rate (57k) in the Mission Planner.  

Permalink Reply by İlhan Başçuhadar on August 29, 2011 at 1:19am

I have no problem with the APM connected Xbee. It has been functioning since I purchased. The problematic one is ground Xbee. I unbricked it, defined VID as 999 and baud rate as 57K but I am not sure about VID of aerial Xbee. X-CTU reads the parameters of ground XBee (I gave the picture of X-CTU result page above) but MAVLINK doesn't connect. When I plug it to the PC, it is recognized at COM4 and only power led lights solid. Yellow and red leds blink once or twice at the beginning and then go off. Any comment on this?

Permalink Reply by İlhan Başçuhadar on August 29, 2011 at 1:57am

MAVLINK gives badpacket error as shown in the attached picture

Permalink Reply by İlhan Başçuhadar on August 29, 2011 at 11:51am

I succesfully unbricked aerial XBee and problem solved. Both APM board and XBees now functioning perfectly. Further, I made my first waypoint navigation in flight today with my homebuild Zephyr and surprisingly there were no problem, APM worked like Swiss watch, flew the model perfectly got it pass through all waypoints I programmed, many thanks to the developers of Ardupilot Mega. 


3D RoboticsPermalink Reply by Chris Anderson on August 29, 2011 at 11:54am
Yay! Love these success stories. Thanks for sharing!
Permalink Reply by Edge23 on July 25, 2012 at 9:07am

I have a similar problem, but nothing worked so far. When I try xbee with x-ctu both test fine. But when I connect apm with xbee to computer it gives usb not recognized error. When I remove xbee it recognizes apm and connects no problem. I am using windows 7 and tried to load drivers but it says unrecognized device has the most current driver. Any ideas?

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