What do I do wrong/how can I debug my antenna?

All seems ok there Dom,
You should be seeing at least some activity on your dump1090 screen using :8080
I suspect the antenna, the ones that come with dongle are not great performers but you can improve things a whole lot with some small changes (cut to correct size) and a tin can to optimise the dongle tv/radio antenna for adsb.
Take a look at first post by member abcd567 below


what happens if you

sudo service piaware stop

./dump1090 --inteactive

anything happening in the terminal window ?