Setup bias-t and gain in web interface

[jmceara]

Hi. I'm trying r2cloud for the first time. I'm using pre-build image. How do I set dongle gain and enable bias-t (rtl-sdr v3 dongle)? I mean, bias-t always be enabled, even after reboot.

I have also tried to set bias-t manually, but doesn't seen to work. I've got this error:

pi@raspberrypi:~ $ sudo rtl_biast -b 1
Found 1 device(s):
  0:  Realtek, RTL2838UHIDIR, SN: 00000001

Using device 0: Generic RTL2832U OEM
Found Rafael Micro R820T tuner
rtl_biast: symbol lookup error: rtl_biast: undefined symbol: rtlsdr_set_gpio

[dernasherbrezon]

gain is automatically configured. By default:

satellites.rtlsdr.gain=45

You can overwrite it in ~/.r2cloud file. Just put the value you need and r2cloud will take it before the default.

I will have a look into bias-t issue.

[jmceara]

May I have one sugestion? Add gain and bias control in web interface. I've add manual gain control in ~/.r2cloud file....but after changing schedule (in web interface), Gain configuration is lost. There's nothing related to gain in the file anymore.

[dernasherbrezon]

Ok. Looks like rtl_biast program is compatible only with librtlsdr by rtl-sdr.com blog. The latest osmocom rtl-sdr has rtl_biast as well. I upgraded rtl-sdr package to use the latest code and rtl_biast program.

[dernasherbrezon]

As for gain, you have to restart r2cloud after you configured override. So the steps are the following:

1. Change the gain setting override in ~/.r2cloud
2. Restart r2cloud
3. Enable bias-t manually sudo rtl_biast -b 1

Actually it is a good idea to configure bias-t and gain via web interface. Given the increasing demand, I will start working on it.

[dernasherbrezon]

Requirements:

• configure in the "general" settings
• store in each observation for reference
• show gain and bias-t status in the observation stats on the left
• start bias-t before the pass and stop after the pass. do not handle cases with unexpected power loss

[dernasherbrezon]

Fixed.