Hi AllI'm doing some experimenting trying to write some code so that we can use a DroneCell to deliver Telemetry over GPRS.However, I've a little bit stuck at the outset. My telemetry port does not seem to be functioning correctly or I am missing something stupid.I've stripped it back to bare bones and am just running the serial port test code.This is sending out data via the USB port fine and I get a nice string ofPort 0Port 0 etcin my terminal window.However, when I connect to the Telemetry port using a standard USB to serial adapter (I have tried two different models), all I get is garbage characters..(It looks like what you get when you set the wrong baud rate). I also notice that the TX/RX lights don't light up when I send data back up on port 3.I've tried multiple terminal programs, I have used ALL of the baud rates and I have tried all of the options and combinations of settings in the USB to serial adapters.Any ideas?Is the Telemetry port slightly different from an ordinary serial port?Do I have to cross any of the RTS/CTS lines? (I've got handshaking set to none at the moment so I'd assume I don't).Data is set to 8Parity noneStop Bits 1I've wired pin 5 of my DB9 to Gnd and Pins 2 and 3 to the In and Out on the IMU.I realise you would normally connect to this port using an XBee adapter, do these do something slightly different from a standard serial port or have an odd setting that I'm missing?I need to be able to read the raw data from this port so that I can add in AT initialisation codes into the main code to get the Drone Cell connected.
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Just a note that I'm not using an FTDI USB to serial converter for this, its a standard USB to Serial adapter with DB9 termination. Which pins on the DB9 do I need to short out to keep everything happy?
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