Seems I have finally got UAVcast installed on the Pi (Problem solved by reinstall a fresh image from raspberrypi.org), but I did't do the steps that instruct in the UAVcast youtube video yet (From 4:50s of the video). I recall you mentioned I can start testing the system without (pixhuak and TTL to Ethernet adapter connected)
My question is that is it okay if I do the steps (from 4:50s of the video; ''interface file edited and droneconfig'')?
And how do I setup the 4G connection using dongle to the Pi? Since I have installed UAVcast, do I just plug it in the 4G dongle to Pi and It would work?
Btw, I think we should keep this post ''clear'' and easy to follow without full of troubleshooting discussion, so if you want you can delete previous reply which posted by me. I will update this post and write my experience after my build, something like 4G drone for dummies