QGroundControl arm and disarming

Hey Guys

So I am having difficulty arming my drone. I have calibrated and connected everything required but on qgroundcontrol is remains as disarmed and doesn’t allow me to click it.

Also on the GPS module it keeps flahsing red on the switch light and had a blue flashing on the gps light.

Can anyone help me arm the quadcopter?

Many thanks,


Are there any messages coming up in QGC saying what is going on?

What version of PX4 and QGC are you using?