Bias Tee support

[Cherenkov11]

Hello, I'm using regular RTL-SDR V3 with a general-use LNA. But I'm not able to enable the bias-t when using dump1090_rs.

Is it supported?

[wcampbell0x2a]

Welcome!

I added a MR that should fix your issue. I had to contribute to the soapysdr-rs bindings since they didn't support this.

You will be able to run as cargo r -- --driver rtlsdr --custom-config config.toml.

with config.toml:

[[sdr]]
driver = "rtlsdr"

[[sdrs.setting]]
key = "biastee"
value = "true"

[[sdr.gain]]
key = "GAIN"
value = 20.0

I can confirm that soapysdr says that the setting changed, it would be awesome if you could test that with your setup. I have nothing that uses bias-t power.

[Cherenkov11]

Ok, I cloned the add-sdr-config-settings branch and tried to compiled but your config.toml was incorrect, I had to modified like this:

[[sdrs]]
driver = "rtlsdr"

[[sdrs.setting]]
key = "biastee"
value = "true"

[[sdrs.gain]]
key = "GAIN"
value = 15.0

And now bias-t power works as expected.

Thanks

[wcampbell0x2a]

Sorry, I meant you'll have to add your own custom_config.toml file. I probably won't include a compiled rtlsdr config with bias-t enabled.

Glad it worked!