OP25 OP25 Am I Missing Something

[steve108]

I have a raspberry pi set up with op25, icecast, and liquid soap running as a service. Single frequency hard coded in to the op25.sh script. HTTP terminal available using the "-l http:..." command. That all works great, I can just open a browser on any device on my network and listen.

There is no trunking in my area, at least not that I care about right now.

Is there no way to change the frequency manually through the http terminal for a conventional site? Or ideally, select from a preset list of the handful I might want to listen to?

 

[wgbecks]

It sounds like you're perhaps monitoring a single channel P25 conventional system. The http terminal is only accessible on the localhost
when configured -l http:127.0.0.1:8080 but becomes available across your network when configured -l http:0.0.0.0:8080.

At present, there's no way to change frequencies from the HTTP Console when using either the rx.py or multi_rx.py applications.
However, there are a couple of options available to you.

One option is to configure multiple receivers in multi_rx.py whereby you setup two or more receivers within the bandwidth limits of a single SDR, or you may elect to use multiple SDR's to provide for a greater bandwidth or multiple frequency bands. Othersise, the only option to
achieve remote frequency control is to execute rx.py via a remote (ssh) terminal session whereby you would omit reference to trunk.tsv but would instead set an optional (initial) receive frequency using the -f command line argument.

(Example) ./rx.py --args 'rtl=0' --gains 'lna:40' -q 0 -S1000000 -f 146.460e6 -V -w -v 5 2>stderr.2

Observe the operating frequency displays near the lower left corner of the screen (capture shown below) in addition to the (f) freq
command line option that can be used to input different receive frequencies. However, you'll still need to listen using your Icecast
audio stream.

BTW, you have the ability to request any of the applicable plot screens via the same ssh session proivded that you’re connecting from
an X-server environment (Linux) or from a Windows PC using PuTTY along with Xming or equivalent x-server.

 

[boatbod]

In the curses terminal you can use the "f" key to directly enter a frequency, but there is no equivalent in the http terminal. To be frank there are easier ways listen to conventional frequencies than with op25, so little enticement to improve this area of the UI.

 

[steve108]

Thanks for the insight!