Been spending a lot of time on DMR (Digital Mobile Radio) these days. Recently ordered a DVMega / Bluestack Node and have been having a ball chatting with people all over the World.
As a matter of fact I had a very nice TAC311 QSO with HL5KY in Korea on 2/4 @ 22:20 hours.
The black PI is a PI3 Mod B where I run my Web Server, custom firmware for the Tytera MD380 called MD380 Tools and do some crazy Java Coding.
The clear PI is a PI2 and I experiment with all kinds of code like the unsupported BlueDV console for the BlueStack Node.
And of course the top of the stack is the HotSpot. Right now the console is an Nexus 7 tablet running Andriod with the BlueDV console. Pleas note my HIGH TECH way of keeping the STACK together!!!
If you are interested in finding out more about DMR, you can listen to DMR Ham Radio Operators talk on the various talk groups. A good place to start is to listen to talk group 3100.
Most of all have fun! 73 KE2YK