I aim to get the maximum out of my Raspberrypi 3 using an Airspy R2 radio. Some people say that running the pi with 20 MHz (option
airspy_adsb) will overload the system. Now I can check CPU load using
htop and I see this is not the problem (load average only ~1). However it could be that packages are dropped on the USB bus since Ethernet is connected on the same lane in a Raspberrypi 3. It is suggested to use
airspy_rx -r /dev/null -t 0 to see wether everything comes through but I only get an error
airspy_open() failed: AIRSPY_ERROR_NOT_FOUND (-5)
The same happens with
$ airspy_info airspy_lib_version: 1.0.9 airspy_open() board 1 failed: AIRSPY_ERROR_NOT_FOUND (-5)
How do I get those programs to work?
Flightaware including MLAT is working so there is communication with the airspy. I use Raspbian stretch v9.6 with packages airspy v1.0.9-1, gr-osmosdr v0.1.4-12, gqrx-sdr v2.6-1 and pulseaudio v10.0-1+deb9u1 if that is of any concern.
The answer to the thread title shoud be:
Install airspy_adsb using the howto but add
journalctl -n50 -f -u airspy_adsb. If you continuousely have lost samples almost every second your computer is overloaded. If it happens just a few times a day it’s probably not relevant.
read the full thread for all the details