I have a Pi in my loft receiving ADS-B aircraft signals and sending them to the Planefinder website. All works very well. Most of the transmissions have location data, but some aircraft, including military ones, only give their altitude.
I have recently started flying a drone. I am very careful to only fly in uncontrolled airspace and below 400 feet where I should be both legal and safe. Unfortunately some of the low flying planes around my home area fly below their supposed minimum altitude of 500 feet.
It should be fairly simple to build a portable low flying aircraft alarm based on Dump1090 which alerts me if there are any ADS-B signals showing low altitude and good signal reception.
I am reasonably familiar with Python, and with GPIO stuff, but don't know how to read the Dump1090 output into a Python script. Any suggestions would be most welcome.