linuxguy

I'm looking to get OpenWebRX running on my RSPDuo connected to a RPI5 running the latest Debian. Currently getting SoapySDR to talk to the hardware via the sdrplay_apiService "driver" but the apiService doesn't actually reach the point of listening for TCP connections.

root@raspberrypi:~# systemctl status sdrplay
● sdrplay.service - SDRplay API Service
     Loaded: loaded (/etc/systemd/system/sdrplay.service; enabled; preset: enabled)
     Active: active (running) since Thu 2025-03-13 15:10:01 CDT; 6s ago
   Main PID: 1447884 (sdrplay_apiServ)
      Tasks: 3 (limit: 9431)
        CPU: 8ms
     CGroup: /system.slice/sdrplay.service
             └─1447884 /opt/sdrplay_api/sdrplay_apiService

Mar 13 15:10:01 raspberrypi systemd[1]: Started sdrplay.service - SDRplay API Service.
Mar 13 15:10:01 raspberrypi sdrplay_apiService[1447884]: [1447884]: sdrplay_apiService: sdrplay_apiServiceWorkerThread: Entry
Mar 13 15:10:01 raspberrypi sdrplay_apiService[1447884]: [1447885]: sdrplay_apiService_device: heartBeatThread: Entry
Mar 13 15:10:01 raspberrypi sdrplay_apiService[1447884]: [1447886]: sdrplay_apiService_device: registerDevThread: Entry

root@raspberrypi:~# netstat -tupan | grep sdr
root@raspberrypi:~#

I've straced the process and just get a lot of

futex(0x7fae6d2058, FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1741893489, tv_nsec=743687000}, FUTEX_BITSET_MATCH_ANY) = -1 ETIMEDOUT (Connection timed out)
futex(0x7fae6d2000, FUTEX_WAKE, 1)      = 0
futex(0x7fae6d2058, FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1741893489, tv_nsec=753687000}, FUTEX_BITSET_MATCH_ANY) = -1 ETIMEDOUT (Connection timed out)
futex(0x7fae6d2000, FUTEX_WAKE, 1)      = 0
futex(0x7fae6d2058, FUTEX_WAIT_BITSET|FUTEX_CLOCK_REALTIME, 0, {tv_sec=1741893489, tv_nsec=763687000}, FUTEX_BITSET_MATCH_ANY) = -1 ETIMEDOUT (Connection timed out)
futex(0x7fae6d2000, FUTEX_WAKE, 1)      = 0

Anyone using the SDRPlay API successfully on recent debians? Anyone know how to debug sdrplay_apiService?

I bought a RSPduo recently and it has two receive tuners; each with a dedicated antenna connection. It'll receive from 1kHz to 2GHz. I plan on hooking a DMN-D3000N that'll receive 25-3,000MHz and I'd really like to avoid running two separate antennas for it. At least until I can figure out how to run a proper long-wire to port one parallel and close to my dipole without frying things...

Anyway, 50-ohm antenna splitters seem to be pretty narrow bandwidth wise. Would splicing together two connectors and the antenna feed line work so that I could plug the one antenna into both tuners?

Bonus question: I'll probably put a DXE-RG5000HD RF guard inline to prevent my transmissions from harming anything attached to the discone. Would the same work with the long wire antenna were I to just stick the wire in the middle of the BNC connector?

This climbing aloe has been in its pot for a couple of years. It lives inside during the cooler months and outside in the sun during the warm ones. It had a trellis until today when I removed it due to the plant not really climbing the trellis.

I'm thinking a couple things to improve the situation here:

1. Repot it into something broader but not as deep, unless the roots are that deep.
2. Perhaps a bit better drainage.
3. A trellis that's closer to the plants height, can handle the weight, and isn't 6 feet tall.

What's your rating? Thoughts on how to improve this situation?

Listening to a local repeater and the waterfall display shows some pretty wide modulation whenever the repeater is in use. If I'm showing +/- 50kHz on the scope then the repeater's bandwidth is frequently 20+ even 60+ kHz.

Given that FM voice bandwidth is typically less than 15 kHz, this would indicate a failure somewhere on the repeater tx side of things right?