SBARC DMR Talkgroup: 31073
Hotspot Frequencies (OpenSpot, Zumspot, etc.)
A “hotspot” is merely a 10 mW transceiver used to connect to the DMR network when a repeater is either out of range or a user desires additional flexibility. On our nets we discuss various commercially made and homebrew hotspot hardware. When picking a simplex frequency to operate a hotspot on it is important to maintain good operating practice. The important consideration here is not as much the 10 mW hotspot devices themselves but the 5W handheld transceivers and the 25W-50W mobile DMR units transmitting on the hotspot frequency. As there are NO suitable hotspot frequencies in the 435-450 MHz band segment, we suggest starting at the lower edge of the 431.0125-431.0375 MHz segment. Specifically 431.0125 MHz, 431.025 MHz and 431.0375 MHz are three good hotspot simplex channels that conform with the local SoCal 70cm bandplan. If you have neighbors close by who are using these frequencies already or you are on a promontory, you might consider using higher frequencies between 431.0375 and 431.600 MHz in 0.0125 MHz (12.5 KHz) increments.
ZUMspot Raspberry Pi Info and Setup
Dave, AI6VX published an excellent tutorial for setting up ZUMspot hotspots.
DMR Codeplugs and Firmware
The following are downloadable files for codeplug programming and firmware updating for the AnyTone AT-D868UV and AT-D878UV handhelds and the TYT MD-380/390 handheld radios. Note that some AT-878 radios may require this modification to resolve a “range error” when loading certain codeplugs with configurations in the amateur bands.
AnyTone AT-D868UV / AT-D878UV
TYT MD-380/390
Custom Firmware Installers for TYT
Other Codeplugs
Other Codeplug Editors
Documentation
