IMU alternative connection to ardupilot?

Mark Colwell June 4, 2010 at 2:05pm

I have ArduIMU +5v power wires going to ArduPilot Bat +, - pins (+5v power is available when servo power option is shorted, from servo + bus, I use a 3 amp BEC plugged into CH4 ) that are bent outward 30° and don't connect up to shield, I was powering FMA-IR sensor from these pins before IMU was released, I unplug data lines only from FTDI connector. Xbee is also powered from FTDI connection so it is disconnected during programming / serial monitor access.

Greg Fletcher June 3, 2010 at 7:34pm

You have to unplug it. Otherwise when you program the ardupilot, ... well it just won't work. The Tx from the FTDI will be conneced to the Tx on the IMU. Two Tx,s together won't work. Tx's are high(Vcc) when idle. When the other one transmits, it pulls the line low. Like shorting a battery except the chip designers put in shot protection. If the line is always at Vcc then no data. You would need a switch and solder your own connector. Go to DIY store and get the schematics for the shield or Spakfun for pilot. My be easier to unplug, unless your willing to learn. I know because I've done this already .

hopslink June 3, 2010 at 4:30pm

If you have a lead for the normal GPS port and don't mind hacking it you could attach there, alternatively the serial pins also look to be available next to the GPS header 'round the corner' from the FTDI header.
Provided your IMU is not powered up you should (in theory, test this carefully) be able to program AP without disconnecting the IMU from the AP board.

HTH

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IMU alternative connection to ardupilot?

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