I've been testing my purple board through the USB and it works good enough to replace an ArduPilot Mega 1 on an EasyStar. Everything is connected and the power jumper is in so the ESC is supplying system power.
But, the APM2 will not start up on either ESC or UBEC power. Even wired in, it still boots on the USB power, as it has always done. The APM1 never had any problems with power on this plane and another APM1 always works on a T-28.
Has anyone seen this problem with ESC/UBEC power?
All APM 2's in the second batch (those shipped this month) have the new bootloader which should no longer freeze if there is activity on the serial port. That bootloader is here if people want to update an earlier one.
If you've got any trouble powering the board with an ESC, make sure the JP1 power jumper is in place, as directed in the manual.
I've not activity on serial, it is disconnected.
I've received my APM one week ago (order 17706), so I've to update the bootloader?
I've placed JP1 as the manual suggest, only solid blue led.
Emiliano: No, the bootloader should be fine. All APM 2s shipped this year have the new bootloader. I suggest you contact customer support at firstname.lastname@example.org
Chris... can the bootloader be updated using the USB port of the APM2 or it is mandatory to use an AVR programmer ? Thanks.
Nice... i know you suggested to ask for a RMA but before to send the board over we want to make sure it's not a bootloader problem...
Do you know if this model will work ? http://www.sparkfun.com/products/9231
The hobbyking one may be a little hard to get here in Europe...
We also have the same problem, power on, blue LED goes solid, press reset and it boots normally. My APM2 is from december i will look to update the bootloader. Nice thing that we can solve this issue. Thanks.
I've wrote an email to email@example.com and I'm waiting for a reply.
I've also tried to flash the bootloader but this solution doesn't work for me.
Do you have a different results?
After a really fast contact by support, the problem is solved.
The solution is very simple, the problem are some data in the EPROM.
Try to boot the APM2 without SDCARD, if it boot fine you have only to wipe the EPROM using the cli with the USB cable.
So insert your SDCARD and erase the EPROM:
Open the MP and go to the terminal TAB
Hit Entern three times
Power off the APM2 and try it with your ESC.
Well today we've been experiencing some different results... at first we only had the solid blue at start problem... which was not really painful since a reset did the job... today we had another one... the APM2 seems to boot right, blue/red LEDs flashing... then solid orange (calibration) and then nothing... We spend 4 hours on the field this afternoon trying to figure out the pattern... the only conclusion we got was : occurring only with XBees, never in USB. Very weird since we never encountered this problem before...
Another problem : no GPS fix when connected on Mission Planner with Xbee... this, also has never happened before, and we did everything, CLI setup reset procedure, installing ArduPlane from Planner, through Arduino, etc etc... Incredible behavior, so the mission planner shows the numbers of sats, increasing 7, 8... 9 and still no fix, sometimes it drops down to 5 goes up to 8, etc etc... completely clear open sky. We had the same problem yesterday...
When plugged to USB fix is found in seconds. We haven't changed anything in the plane, same gear, no modifications, as we're have only been testing the nav. Only the Mission Planner have been updated, but we've tried with previous versions as well (especially a version we've done all our first tests with on another computer, which was working quite good, same problems).
I'm gonna try your workaround and see if it fixes something, and i'll try to update the bootloader and see what happens. This APM2 is driving us crazy...
About the cause of the problem, i've noticed that the card is quite loose in the slot, most of the times it says there is no card plugged in, you have to push it a millimeter in... maybe this can be the cause ? Some vibrations causing the card to slightly slide out a bit while flying and saving logs can corrupt something ? No idea...
Sounds like it may be a defective board. Please contact customer support for a RMA.
Thanks Chris, but should i try the procedure Emilio wrote and upgrade the bootloader first ?
Have you heard of a similar GPS problem reported by anybody ? I've found a couple of GPS fix problems in the forums but nothing like we had. What puzzles me is the high sat count (like 8 or 9) and no fix, switch off and plug it in USB and fix (which means the GPS works), unplug and switch back to Xbee and no fix. But still, it worked once today using Xbee and finding a fix...
We've also tested with AP2.28 uploaded with Arduino, defining the MTK16 instead of auto in the config file... Same thing happened.