ASC/RSSI led light up when trying to connect. But the connection is always unsuccessful. I have check the connect fr the xbee to APM, no problem with connection of 4 pins.
Have you tried the Xbee loopback test (connect RX to TX on the plane side) within X-CTU?
Does it work?
Try setting he baud rate to 57600 (both on the XBees and in the code) and see if that works.
On the telemetry page (http://code.google.com/p/arducopter/wiki/Quad_TelemetryPage) there is a test program (at the bottom of the page) for testing the connection. Does that work?
Test code succesfull - i read port3 from computer but configurator still not connected...
Maybe the problem is with receiving data.
Try changing the test program like this;
// Serial3.println("Port 3"); <--uncomment this line and add the rest below it
int inByte = Serial3.read();
That way, instead of just sending a lot of data, you only send back what you received and therefore also testing that you can receive data (which is just as important).
i have found out my problem. It is the power supply from APM/IMU is not enough for my xtrembee adapter board.
If i disconnect the lipo and direct 5v from usb, my wireless got no issue with 1111000 baud.
But if i connect lipo with esc, then i have problem with wireless link.
does the current following in the xbee adapter board cause the xbee to burn?
I am thinking of having a lipo regulator 5v / 4.8A to adapter board xbee.
the apm has a onboard power regulator...
what voltage is going to the xbee with lipo plugged in?
and what voltage with usb plugged in?