Main screen indicators/3DR radios

Hi,

Can anyone tell me what the flashing red square on APMplanner main screen in the attached screenshot means?

I’m down to my last avenues of investigation on a problem and this is the last thing before I have to make a video to send to 3DR for help.

I can connect my Iris+ via the usb radios (pixhawk NOT cable connected) fine but cannot get any telemetry (my simple test: horizon doesn’t move with drone)

I’ve reflashed both radios with factory defaults using the config utility
I have some knock-off radios from readytofly quads that connect and transmit data fine from my DIY quad with it’s RTFHawk. But when I attach the same radios to the IRIS+ I’m back at the same problem - connections in the Iris+ are slightly different though so I don’t know wht to expect from that

Setup:
Iris+
APM PLanner2 2.0.18
Ubuntu 15.04
Solid green and flashing red light on both radios

So it looks like it’s connected by the lights but no data coming accross - so maybe something wrong with the IRIS? - any suggestions?

Thanks!

It means APM Planner 2.0 is not receiving any data. It flashes green when its receiving data. i.e. the heartbeat message. it should receive a HB message every second.

Great thanks!