I set up my Raspberry Pi3 with Airspy server, and it worked ok I was able to connect to it remotely using SDR#. I didn't really want it publicly listed so I set this to 0 in the config file. I knew the ip address and was still able to connect remotely. For some reason that's now stopped working. If I set it to be publicly listed on the airspy map it works no probs, set to not publicly listed then won't connect.
This was working, so I don't know why it isn't now. Any idea's ?
The other thing, when it was working I had a high noise floor some 20dB higher compared to running the server on a laptop. I tried powering the Pi from the same laptop (running on battery) to eliminate any wall wart noise and it made no difference, so it's not that. I tried running the server on the laptop, then powered the Pi on and held it close to the RTL-SDR dongle, and it made no difference. SO it's not the wall wart, it not the Pi spewing out RFi, the only thing I can think is that it's internally generated noise on the USB lines. And the laptop is much cleaner than the Pi in this regard.