"http://www.amazon.com/Robotics-IRIS-Motor-920Kv-MT2212/dp/B00S098M4...
$24.99

Also everything you need to know about building a new Iris+ from the ground up. https://www.myminifactory.com/pages/3drobotics ;"

"I had the same problem, and believe it or not I found a simple solution that worked for me. I copied all the logs from the microSD chip to my hard drive (C:\Program Files (x86)\Mission Planner\logs\QUADROTOR\1) then I erased all the logs on the…"

"I have had this problem for over a month now, and even 3DR was not sure what the issue is. they did tell me that using terminal no longer works in APM 3.2.1 or higher, and that I should used mavlink, but still no luck.  BUT I noticed that my log…"

"I have been having this problem for about two months now. Somewhere along the line I must have updated my firmware.   I was able to download the log using Terminal today, but that did not work in past attempts.  According to another post they…"