Help requested: Two SDRs station.cfg - Allocate frequencies to each SDR?

[John Ball]

Hi folks,

SEARCH: I've searched the conversation threads but perhaps my search terms are not unique enough to find an answer. I did find three threads related to, but not exactly matching, the issue I am facing.

ISSUE: In my station.cfg file, I have SDR SETTINGS configured for two SDRs: [sdr_1] and [sdr_2]. I have used eeprom to configured a unique device_idx for each SDR: SDR00002 (406 Mhz SDR) and SDR00003 (1680 Mhz SDR). Both SDRs appear in the LAN dashboard and the Pi is reporting to sondehub as expected.

The issue here is that station.cfg allows for multiple SDR values, but it appears that the [search_params] section does not allow me to specify which min_freq or max_freq is assigned to each SDR. I can specify multiple SDRs, but I cannot specify which SDR is for a particular frequency band.

SIMILAR SOLUTIONS: As I have done with my ADS-B Pi feeder on a different device, I can allocate ADS-B to one SDR and UAT to the second SDR, but for the radiosonde project it doesn't appear to be an option.

TROUBLESHOOTING: 

1. I tried adding duplicate values [sdr_1] and [sdr_2] under the [search_params] section but I get an error that the values already exist under the [sdr] section.
2. I tried duplicating the [search_params] section under each SDR device but I get an error that the values already exist under the [search_params] section.
   
3. I tried specifying frequency ranges from ~400 Mhz to ~1680 Mhz but [sdr_1] errors out on frequency scan.
   
4. If I don't try to specify unique values for both SDRs, the unit boots up and starts normally but only displays the ~400 Mhz SDRs.
5. I've thought about creating a second virtual environment and having a separate, second instance of radiosonde_auto_rx running on the same Pi, but I've never done this with any of my Pi devices: LiveATC feeder or ADS-B feeder.
   

Can y'all guide me on how to allocate/specify one frequency band for each SDR?

[Mark Jessop]

Hi,

There is no way to do what you are after with one instance of auto_rx.

To monitor multiple bands like you are trying to do, you probably need to run a separate instance of auto_rx like you have surmised.

Where are you that 1680 MHz sondes are still being used? I thought they'd been phased out everywhere by now?

Cheers,

Mark VK5QI

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