Discussions

John,

Did what you suggested and this time its the left stick that is able to issue signals for the motors to move. Instead of receiver pins 1, 2, 3 and 4 connected to APM 1, 2, 3, and 4 respectively, I swapped the order into receiver pins 1, 2, 3 and 4 connected to APM 3, 4, 1 and 2 respectively. Moving the right stick understandably did not solicit any motor movement. With the swapping, I solicited the following motor movement as I use the left stick of the transmitter.

left stick center - no movement

left stick up - right motor turns

leff stick down - left motor turns

left stick left - front motor turns

left stick right - back motor turns

The above result is a confirmation there's no problem with the transmitter receiver but with the APM. Other strange things I noticed with the APM are,:

1. Uploading code will result in a sync error. If I press the reset button as soon as the arduino confirm successful compilation result in a 50:50 success in uploading the code while in a non-cli mode. In CLI mode though, I achieve almost a 100% uploading as long as I don't have delay in pressing the reset button!

2. The green led (A) blinks at boot up, turns solid but then once in a while without me doing anything blinks. Based on the wiki, a blinking green after boot up indicates arming of motor ... moving throttle though do not solicit any motor movement!

3. When radio is on the PPM led on the APM does blink confirming radio communication but arming motors is not possible.

My conclusion is that the either the APM, the oilpan or BOTH is defective! ANY SUGGESTION ON HOW I CAN HAVE THE BOARD REPLACED!!!