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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Shrink/Expand Raspberry Pi Filesystem Images

This post documents a few tricks I found useful when making SD card images for Raspberry Pi projects, to minimize file size and download times while making full use of the SD card space. These instructions work for Raspbian Stretch images; not sure about older or newer versions. The first time a Raspbian system boots, it runs a program to expand the filesystem to use the full size of the SD card. So, when you are using a Raspberry Pi […]

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