Here is my latest endeavor, the MMDVM high power hot spot. It consist of a MMDVM modem board, an open-source multi-mode digital voice modem coupled with a Raspberry-Pi 3. It will support D-STAR, DMR, Fusion and P25. It can be used in Duplex as well as simplex as a built-in repeater controller. It is coupled with a Motorola CDM1250. It will be used to boost my home station and act as a simplex repeater and gateway to the D-STAR network. Testing shows these PI-STAR hot spots work well as remote gateway devices with great range, Mine aproximately 20 miles.
My High Power Hot Spot can be accessed by setting your radio as:
set frequency as 147.555
URcall cqcqcq
rpt1 w4ccq C (2spaces) between q and C
rpt2 w4ccq G
RASPBERRY-PI HOTSPOT
Raspberry-Pi Zero with Zumspot top hat
Here pictured is a zumspot board mounted on a Raspberry zero. It uses minimal power makes a great mobile or portable repeating gateway devices. Linked via wifi a hand held radio can access Repeaters and reflectors or talk groups all over the world. These little guys can cost $100.00 or less and run on open source software available as free ware.
RASPBERRY-PI HOTSPOT
Raspberry-Pi 3 with a Zumspot top hat
Same ZUM-SPOT on a full size Raspberry Pi computer that sells for $35,00. It offers a bit more connectivity with 4 usb ports and full size HDMI and audio ports. OLED displays are avalible at little or no coast.