I have a IRIS+ and am trying to use joystick fly it via MAVLink in Ubuntu.
My issue is that my joystick control code works OK if I directly connect ground station and IRIS via USB cable (receive attitude message at 8Hz). However, I will experience a 2 seconds latency using 3DR radio to replace with USB cable (receive attitude message at 2Hz).
To solve the latency problem, I follow http://copter.ardupilot.com/wiki/common-3dr-radio-version-2/ to set mavlink mode of radio to low latency. After that, IRIS is even not able to receive RC override message.
Can anyone give me some help or suggestions for this problem? Thanks in advanced.