Of course, when you have a classic like a Bel Aire, what more fun than to take it to a drive-in theater?! Contact: There's a contact form on the N5BOC websiteįor fun, I mounted the LoneStar MMDVM Simplex on an RPi 4B and in a C4Labs Bel Aire AC case, with a Noctua fan up top to keep things nice and cool.Documentation: N5BOC MMDVM Documentation.
Order directly from David via his website: N5BOC store.The LoneStar MMDVM Simplex I received didn't require any RxOffset, and it stated that on the box, so it looks like he tests the individual boards before shipping them.
Speaking of that all of the Analog RF signals are on the TOP side only and the high harmonic digital signals are all kept isolated on the BOTTOM side. Also this isolates signals between TOP side and BOTTOM side. This acts as one very large decoupling cap the side of the entire board. This board is now a 4 layer board with LARGE ground planes for 3.3V and GND sandwiched in the middle. … this board has its own dedicated 3.3V regulator and does not pull voltage off of the noisy Raspberry Pi 3.3V line like all other simplex board do. It's a well-designed, four-layer board with a YAGEO 432 MHz ceramic antenna (as well as SMA through-holes), and a large ground plane sandwiched in the middle, which results in well-isolated signals. It also can be mounted on the faster RPi 3B+, 3A+, or 4B, as well as most of the older RPi boards. This board is the same size as and works well mounted on a Raspberry Pi Zero W/Zero 2 W. ∧ Top | Quick links ∨ LoneStar MMDVM Simplex I discuss my experiences with my current favorite hotspots in this article. During that time, I've tried a bunch of devices and apps including a whole range of MMDVM-based hotspots running an app called Pi-Star (discussed in more detail in the Playing with Pi-Star article ), three generations of SharkRF openSPOTs running their own software, and several older models, some now discontinued. I've been playing around with personal, low-power hotspots since 2016. When the AMBE ® chip is used this way, a digital radio is still needed. However, in this case, the AMBE ® chip adds additional capability for transcoding between modes like D-STAR and DMR.
#DMR JOTSPOT HOW TO#
(For info about digital repeaters, see: How to make a MMDVM Digital Repeater by N5AMD and Repeater Builders. This is an article about personal, low-power hotspots, also known as personal access points 1, not repeaters. Overall, this is an exciting area of amateur radio that is evolving and progressing rapidly with some excellent work being done by some very innovative hams (there's a shoutout to some of these folks at the end of this article). OpenBridge = An open protocol to link DMR serversįor someone like me who doesn't live within range of a digital voice repeater, a hotspot goes beyond being fun to being a critical key to accessing digital voice systems, a gift that opens doors to the whole wide world. HBlink (Home Brew Link) = An open-source, amateur radio networking protocol Notes: Some multi-mode hotspots are themselves capable of directly communicating to different modes. Here's a simplified diagram of what it looks like when you connect via your hotspot to a BrandMeister-hosted multiprotocol talkgroup, which enables people using different modes to talk with each other: Hotspots can link to DMR, P25, and NXDN talkgroups D-STAR reflectors YSF rooms and so on.īasically, hotspots are your own personal digital voice repeater and gateway, which can be really fun.
#DMR JOTSPOT SOFTWARE#
A shout out to the innovators and enablersĪ personal, low-power hotspot is a combination of hardware, firmware, and software that enables an amateur radio enthusiast with internet connectivity to link directly to digital voice (DV) systems around the world.