This is a portable crossband repeater setup in a Pelican case. It is intended to be deployed during public service events. Raspberry Pi's were used to keep the form factor small (and the cost down, since it's all out of pocket).

We tried to use a Raspberry Pi 3, but unfortunately it doesn't seem to be supported yet. We aren't really doing any processing. It's two radios on simplex channels, with a third that transmits on both. The largest number of audio paths enabled at any given time is 2. A Raspberry Pi 2 should be able to handle that. In fact, the CPU never goes above 30%. I have another one running Asterisk that can handle managing 10 active SIP calls without an issue.

-Matt

On Fri, Apr 8, 2016 at 11:16 AM, Kevin Custer <kuggie@kuggie.com> wrote:

3 radios on one Raspberry Pi 2? I guess my next question would be why?

If you are running SimpleUSB now, switching to USBradio will likely make the situation worse as there is generally more DSP going on in USBradio than SimpleUSB - depending on exact configuration.

Raspberry Pi's are inexpensive as compared to some PC's which could have enough horsepower to properly operate 3 or 4 radio interfaces, even in full DSP. If you really want to run multiple radio adapters on a single appliance, consider choosing a hardware platform powerful enough to do it properly.

Kevin

On 4/8/2016 9:52 AM, Matt Brennan wrote:

Sorry - 3. 3 separate simplex radios.

Someone else individually replied to me and said it's likely an issue with SimpleUSB and I should try using usbradio instead. I will be trying that tomorrow, but still open to other suggestions.

Thanks again,
Matt, NM1B