"I need to check my settings more thoroughly, the issue was that the serial 3 baud rate was set wrong on the APM. Thanks for the help."

"Oh, and I bought them from the diydrones.com store"

"I'm not at home at the moment, but I remember it being 1.5 sik"

"The USB is not connected when using the 3DR radios, I have made sure of that. I think that it may be the usb to serial cable, as now, when I plug either unit into it, it boots in bootloader mode with a solid red light (although if I keep removing it…"

"Yeah, USB works fine, and I am using MAVLink 1.0 version of APM Planner and Arducopter 2.6 which corresponds Ithink."

"My 433 Mhz 3dr telemetry units are not working as expected (details here: http://diydrones.com/forum/topics/433-mhz-radios-will-bind-and-conf...) essentially they bind and config utility works, but I am getting a heartbeat error with missionplanner.…"

"Theoretically, you should be able to calculate ideal PID settings from an impulse response of a system. The problem is, without simulation, this is hard to perform. A better approach I would have thought is using a log analyser to estimate the error…"

"I saw this thread: http://diydrones.com/profiles/blogs/arducopter-automatic-pid-tuning... automatic PID tuning, and wondered if anyone here had any success with it? I am tempted by the idea, but it seems that the code he is using is based on…"

"I will wait until i get my wireless telemetry sorted before I embark on that mission I think, although I purchased some APC220 units and I am becoming hesitant as to whether they will work or not. If is unclear from this…"