Add streaming audio to OP25 RPi scanner

Thanks to Graham Norbury, here is how to set up a Raspberry Pi OP25 scanner to stream audio to an icecast or other streaming server. I have updated my plug-and-play op25-rpi.img image at http://febo.com/os_images/ to include this capability (look for the 2018-03-18_op25_rpi.zip or later-dated file). 1. Copy the following into a new file /etc/asound.conf on the Raspberry Pi (you’ll need to do this as root): # output device pcm.loopout { type dmix ipc_key 328211 slave.pcm “hw:Loopback,0,0″ } # input device […]

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Update on P25 scanner — new version, and new installation instructions

SDR

Since I posted my original articles on configuring the Gnuradio-based op25 P25 trunking scanner, there’s been a lot of progress in the code. In particular, there is a new fork that changes the program to a command-line version, which saves a lot of CPU resources and also offers added features. The new version will run nicely on a Raspberry Pi 3, and probably on an RPi 2 as well. Following are instructions to install it from scratch on the PI. […]

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