Open Hardware Mmdvm

Fing Device Recognition technology can identify billions of devices to reveal the make, model. Firmware V1. – When compilation is done you have to set your MMDVM. Indeed, it can manage the three digtal modes DSTAR,DMR and C4FM. The RF Detector signals the MABEL board when there is a signal present on the Transmit port of the DR-1X. MMDVM Open-Source Multi-Mode Digital Voice Modem for Raspberry Pi for Arduino. This guide will help you setup your Orange Pi One similar to that of Rasbian on the Raspberry Pi. Nextion - The Newest HMI Solution Touch Screen Display For. Raspberry Pi Zero W x1 3. RB_STM32_DVM - FAQ (Frequently Asked Questions) Links to instructional videos: If you are still having trouble and running the Pi-Star MMDVM package, try this procedure. Open the downloaded image and slick Write. Narrow Band Emergency Messaging Software (NBEMS) is an Open Source software suite that allows amateur radio operators to reliably send and receive data using nearly any computer (Windows, Mac, and Linux) and any analog radio without requiring a dedicated digital infrastructure or specialized modem hardware. It also contains a complete dashboard and can support a wide variety of hardware. From DL5DI’s description: “The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem, which utilities the power of an ARM processor and a simple analogue interface board. 6- Plug a USB keyboard, a USB mouse and an external monitor using the HDMI connector. Here is a project involving a ZUM Radio duplex MMDVM and a Raspberry Pi 3 B+ combined with my trusty old Yaesu FT-7900 and FT-7800 radios, and a couple of mini-DIN cables. The PNWDigital. New to OSH Park? Password confirmation. 2 manufactured by us. Current needs peak at <400mA for the Pi 3 Model B and <300mA for the Pi Zero W with steady state being about 100ma less than peak. One of the latest crazes in the world of DMR radio is the Chinese iteration of the DMR hotspot. Like the analog repeater, it can control more than one at a time, the limitation is the hardware speed. MMDVM hotspot board x1 4. Newegg shopping upgraded ™. instruction to get your hardware platform run. I couldn’t get it to work reliably as a hotspot. 2018 MMDVM DMR RPT HAT Repeater Open-Source Multi-Mode Digital Voice Modem L - $75. Hardware Support ↳ Raspberry Pi Foundation Hardware ↳ Friendly Arm Nano Pi Neo / Neo Air ↳ Hardkernel Odroid XU3 / XU4 ↳ Orange Pi Zero ↳ Nextion Screens ↳ OLED Screens ↳ ZUMSpot (Hat / Libre / USB) ↳ MMDVM_HS Hat(s) ↳ DV-Mega Hat(s) ↳ DV-Mega GMSK Arduino ↳ DVAP Dongle ↳ DVR-PTR V1 V2 V3. If you own more then one hotspot, use your personal ID number and add a 2 digit suffix, example: Radio ID 3020111, use 302011101, 302011102, ect. Fing Device Recognition technology can identify billions of devices to reveal the make, model. org <----- Point this at the DMR network Port=62031 Jitter=360 Local=62032 Password=passw0rd Slot1=0. Flashing DVMega Hardware from Pi-Star [] Build/Flash MMDVM Firmware from Pi-Star [] Pi-Star Integration with BrandMeister API [] Pi-Star Integration with BrandMeister Hotspot Security [] Add custom FW rules to Pi-Star [] Fix up SSH on the Expert menu on Nano-Spot devices. The network interfacing part, that connects to the reflectors, Talk Group Brandmeister or YSF Reflector : MMDVM. TOMTOP use cookies to give you the best shopping experience. The top countries of suppliers are Malaysia, China, and India, from which the percentage of open source board supply is 1%, 98%, and 1% respectively. MMDVM Open-Source Multi-Mode Digital Voice Modem for Raspberry Pi for Arduino. The communication with an Arduino is via a Serial UART port. It runs off 12V and the folks at Micro-Node told me the box is intended to work off vehicle power so just fabricating or buying an appropriate car power socket to the coaxial power jack on the Nano-Spot should get it powered for you. Indeed, it can manage the three digtal modes DSTAR,DMR and C4FM. Plug in your wifi dongle to a USB port on the Raspberry Pi. You can write your own code for the board. It can run a D-star repeater or hotspot. Average daily solar flux declined over one poi The ZUMspot RPi is an advanced radio module board. INI, so check two or three times the parameter. It has a built-in battery and supports. See the board designed by Mathis DB9MAT, which is a board that brings together the UHF module, the STM32F103 CPU, and which is plugged directly onto the smallest Raspberry Pi, the Pi Zero W. That is what I will be exploring next. Various board versions available; most popular are the ZUM board and ZUMspot. So the MMDVM is normally closed contacts and the AR uses the normally open contacts. 5" TFT 480x320 resistive touch screen display, 16M Flash, 3. [] Install vnStat []. It kept losing the connection to the DMR Master server. The above commands set pin 25 as an output and then sets the pin to a logic 1. The NPR protocol is designed to transfer IP data over radio links, in a bidirectional way (single frequency). png This is the source code of ZUMspot/MMDVM_HS, personal hotspot (ADF7021 version of the MMDVM firmware), based on Jonathan G4KLX's MMDVM software. Man would indeeded be in a poor way if he had to be restrained by fear of punishment and hope of reward after death. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts February 17, 2018 at 3:28 pm #2300 Douglas, W8ADAUser Has the SVXLink Card …. The Kings of Digital group hosts the long-running Thursday night D-STAR Round Table, conducted by N6HKH, that includes discussion of DSTAR and other open system/open source digital modes, on Thursday evenings at 1900 hrs Pacific, 0200 UTC during US daylight savings time (summer) or 0300 UTC during US standard time (winter). ini and DVSwitch. All designs will be contributed on MMDVM open source project. The LimeSDR comes with multiple RF ports, to which U. I won’t get into a detailed explanation of System Fusion or digital operating here, but I will give more information about operating on the K1KC VHF repeater. Pi-Star is a software image built initially for the Raspberry Pi (produced by the Raspberry Pi Foundation). 1, Press POWER button 1s to startup hotspot, wait 30s OLED screen show MMDVM status, when MMDVM service Initialization completed. 2,637 likes · 4 talking about this. Now, note something that WiMAX technologies where very lame few years ago by the client hardware. If you love Pinout, please help me fund new features and improvements. This firmware supports D-Star, DMR, System Fusion, P25 and NXDN digital modes. As the node of Aachen University is the only available option in Pi-Star, all MMDVM hotspots worldwide will connect this server. Jumbo SPOT MMDVM Review. Turn Visual Studio into a powerful HMI/SCADA development package by simply dragging and dropping, no coding required. Wir bauen gerade an der DMR-Versorgung im Rhein-Neckar-Raum, unter anderem ein weiterer DR-1 mit einem Modem von DL7TJ. The MMDVM software is a fabulous development realised by Jonathan G4KLX allowing to built a multimode digital hamradio repeater. Also talk about. With version 4. Net Network is a system of open use DMR repeaters located in the Pacific Northwest. This MMDVM for Raspberry Pi 3B and 3B+ provides a multimode digital access point: D-Star, DMR, C4FM, P25, POCSAG and NXDN. The RB_STM32_DVM is yet another Multi-Mode Digital Voice Modem that gives new life to analog repeaters by allowing them to become digital capable. Schematics, firmware and further documents are open source and available under GNU GPL. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. It is installed in a high bandwidth and low latency fiber optic internet connection in order to bring the best interconnection possible. Step 3: Open the RT3S Firmware upgrade. MMDVM (4) Monk (1) MR3040 (1) Netgear (1) Newsky Mini Digital TV Stick (1) Nintendo DS (1) NooElec (1) Nook (2) Nook Color (1) Nuvi 350 (4) Open Camera Controller (1) Openspot (1) OpenVPN (5) OpenWRT (1) Oscilloscope (1) OSX (3) Outernet (1) P5Q (1) Pebble watch (1) power supply (1) Premier Pro (1) Prolific (1) ps3eye (1) Raspberry Pi (10. The difference between Jitsi and Jitsi Meet: Jitsi is a roll-your-own solution meaning you can download server packages or code and deploy an instance. Average daily solar flux declined over one poi The ZUMspot RPi is an advanced radio module board. The first one is an original board revision 1. com features all 4 modes, Wifi and a "set it and forget it" style operation. DMR All Hotspots MMDVM, SHARK, BLUE DVMEGA tiene 1. In addition to that there is the Open Source Hardware (OSHW) logo on the lower left. Fing App is a free network scanner that makes you discover all connected devices, run internet speed tests and help troubleshoot network and device issues. One of the first things our customers like to do is wrap their shiny new Raspberry Pi in a case. The group is dedicated to discussing and sharing information about implementing D-Star systems using non Icom D-Star hardware, this includes end user and repeater systems, hardware and software. - Open the case and lift the LCD display from the mounting screws. The above commands set pin 25 as an output and then sets the pin to a logic 1. nicely built board with gold plated through holes. 96 inch Oled screen for MMDVM board - 1 x 3D Print Case - 1 x USB cable. Duplex variant of MMDVM_HS_Hat. The MMDVM version is named MMDVM-UDRC. An open-source codec called codec2 is now available, but wasn't available when D-STAR was being created. September 2018 (1) November 2017 (1). ini sets up a MMDVM configuration which isn’t much different than setting up the parameters on a hotspot just without the radio. Open then file MMDVM/MMDVM. The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem, which utilities the power of an ARM processor and a simple analogue interface board. ) Everything about D-STAR but the codec is an open standard. 2, for faster Ethernet, and Power over Ethernet [POE] capability via a separate POE add-on. The RF Detector signals the MABEL board when there is a signal present on the Transmit port of the DR-1X. has a built-in hardware transcoder, and supports D-STAR® cross mode operation using a fully embedded software written in pure C, running on an embedded real time operating system. Specification:-This board needs to cooperate Raspberry Pi PI3, orange pie, a variety of school development board to use,Running pi-star image-This board has been applied in the GM300 GM3188 3688 950I 338 Vitex DR-1X, other types of repeaters and car stations need to be studied yourself new MMDVM Open-Source. Moreover, talking about the tags, be it active, passive, or semi-passive, are a costly affair and has the capability to set. target halted due to debug-request, current mode: Thread. Very quickly! I've had a bit of time recently to dip my toes back into the mode and so much has changed! What follows…. Our network is an all-digital group of over 500 DMR-MARC repeaters in 83 countries with over 144000 registered users. - The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem,which utilities the power of an ARM processor and a simple analogue interface board. The Jumbospot costs about $45 and I've heard tales of people getting them for $35. When the manufacturer uses non-standard (data only) features, the MFID is asserted. It is not recommended to run the Pi-4 at full power for extended periods as performance problems can arise at higher temperatures. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. OLED display x1 (installed on board) 2. MMDVM-Pi rev. Go back into your Pi-Star configuration page and you will see the MMDVM Display Type, select Nextion from the Drop down and click the modem setting from drop down, if you have hard wired the screen to the board or DEV/TTY/USB0 if you have it connected via the TTL converter. After looking into it, one of the cool things I discovered was the ability to create your own DMR gateway using a DMR hotspot that can be purchased as a kit or fully assembled. I was wondered how such thing can work without any hardware but some good people did the trick and I can say that it's working great. Open source MMDVM firmware preloaded and easily upgraded by software MMDVM Schematic: Zum-radio control board MMDVM, connect to a radio with 9600Baud compatability "eg: ft7800, ft7900, ft8900, ftm100, ftm400 etc" and turn it into a multi mode digital node, or use two radios for a simple repeater. This does seem possibly at odds with the GPL licence, but is likely to do with digital codec patents. - BlueDV - MMDVM - Peanut - Buster. Radio Hacking: Cars, Hardware, and more! - Samy Kamkar - AppSec California 2016 - Duration: 51:12. The design we originally envisioned for 1. ストロベリー・リナックス/秋月電子のI2C液晶/OLEDほかをArduinoで使う. 7 Here you will find user manuals, device drivers and softwares for a wide range of our products. Latest STM32CubeProgrammer Software Tool Simplifies STM32 Programming and Protects Firmware Intellectual Property. openSPOT User Manual. Free delivery and returns on eligible orders. The DMR-MARC Worldwide Network Registration system now open, you will be transfered to RadioID. Radio Hacking: Cars, Hardware, and more! - Samy Kamkar - AppSec California 2016 - Duration: 51:12. Description. Newegg shopping upgraded ™. Home Board index Hardware Support Raspberry Pi Foundation Hardware RPi3 A+ won't boot attached to MMDVM open-source head Help with Raspberry Pi Foundation Boards (Raspberry Pi, Pi Zero, Pi Zero W, Pi A, Pi B, Pi B+, Pi2 B, Pi3 B, Pi 3 B+). MMDVM_Bridge. Features include: a 3. The ZUMspot and MMDVM_HS_HAT creators use this Open Source Hardware license. 2 manufactured by us. The RB_STM32_DVM is yet another Multi-Mode Digital Voice Modem that gives new life to analog repeaters by allowing them to become digital capable. change Modem_Type to "MMDVM_HS_NPi Hat (VR2VYE) for Nano Pi(GPIO) " *For old version HAT, *If not successful,some old nano HAT need do more operation,connect the upgrade GPIO jumper, detail see here. Hope fully soon we will be able to release a bit of a outline on how to interface to the DVSI AMBE3003 so those that have the interest. ini sets up a MMDVM configuration which isn’t much different than setting up the parameters on a hotspot just without the radio. The LimeSDR comes with multiple RF ports, to which U. All 40 header pins are. It will decode DMR talk groups on the MOTOTRBO™ repeaters on the C-Bridge network, but it will not decode talk groups on the MMDVM repeater BrandMeister network. It combines the power of an ARM processor and analog radio interface to create a modem to handle all amateur digital voice modes. However, if there is a hardware problem — like a damaged network card or router — then you will have to contact a technician. Billed as the world's oldest computer festival, TCF19 was the 44th year in which many hobbies converged which show how ubiquitous computers and wireless technology has become. With that out of the way, onto the details. As an example, the initial run of Open Graphics chips is expected to cost around $2M US to produce, just for the graphics controller chip. Retevis Rt84 Software. Buy best Duplex MMDVM Hotspot Support P25 DMR YSF + Raspberry Pi Zero + 2pcs Antenna + OLED + Exclouse Case sale online store at wholesale price. Now this is interesting from our friend Shawn. 5" TFT 480x320 resistive touch screen display, 16M Flash, 3. The first one is an original board revision 1. The first part of this system is the hardware switch itself. This is a module to interface to MMDVM hotspot modems which replaces the Raspberry Pi and allows you to connect your modem to BlueDV running on your iPHONE or PC via either USB or BlueTooth LE. The That is the last step in preparing the hardware for use - that was the most complicated part of the setup! Microsoft Word - TEENSY MMDVM Users Manual. Digital Mobile Radio (DMR) is an open digital mobile radio standard defined in. Best MMDVM Options General In the interest of supporting the folks that have developed these devices directly and not supporting all the cheap (actually not all of them are cheap) Chinese knock-offs, what are the best options for MMDVM devices?. Package List: - 1 x Nano Pi NEO(512M)with Fan - 1 x 8G TF Card burn Pi Star - 1 x Nano Hotspot Board with Ceramic Antenna - 1 x Gold USB Wifi Network Card - 1 x 0. Their roots are totally different, but as their networks grow, so do the compatible connections to many of the identical Talk Groups. 95 from Ham Radio. Hotspots do not require repeater ID's. government's current (as of 2008), encrypted telephone communications system for wired or "landline" communications. First, let’s look at one of the MMDVM_HS HAT boards: As you can see, it is stamped with both the Open Source Hardware Association (OSHWA) logo as well as CC-BY-NC-SA. 1a) Background. If you are interested in a multimode repeater/hot spot, a great place to start is Jonathan Naylor's MMDVM Git repository. 2 manufactured by us. on the Raspberry Pi 2/3/4. So you're effectively crippling your project from day 1. Mostly due to certain disagreements that the mode has attracted (everybody has a view, nobody can agree!) I lost interest. This repository is in very active development and only experienced builders will be able to complete all the requirements necessary to build a system from scratch. MMDVM is composed of two physical parts. A man’s ethical behavior should be based effectually on sympathy, education, and social ties; no religious basis is necessary. - The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem,which utilities the power of an ARM processor and a simple analogue interface board. - The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. cpu: hardware has 6 breakpoints, 4 watchpoints. The ZUMspot and MMDVM_HS_HAT creators use this Open Source Hardware license. With all of the features we know and love of Raspberry Pi Zero W; the new Raspberry Pi Zero WH is the same board that also includes professionally soldered headers. This is the same RF Module thats in use in the DVMega and SharkRF OpenSpots, but as it's DIY its significantly cheaper. Despite an extensive search (prior to August 2018), a proper source was not discovered until. With the DV3000 hardware AMBE vocoder dongle, DSTAR audio is quite good. Those familiar with open source hardware and software probably already see what has happened here. It is important to note that is was created for Amateur Radio. Bruce makes a strong argument that an Open Source vocoder needs to be developed. MMDVM-Pi rev. #N#London, England. Note: All designs will probably be contributed on MMDVM open source project. The HUB is open to all the Ham Radio community that wants to use it without any restrictions. - Not include the raspberry pi. - The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. Assembled MMDVM Hotspot Supports D-Star, P25, DMR, YSF (Rpi + OLED + Antenna + Case) Fully assembled and tested MMDVM Hotspot with OLED Screen in an ALUMINIUM Case. The Nextion LCD touchscreens are great for Arduinos because most of their functionality and processes are self-contained in the screen. Do you want to link a BCR Repeater to the D-STAR network? Select the D-STAR Kit. Fake/clone MMDVM_HS Boards. This is being discussed in the Pi-Star User Forum. 0 Longitude=0. Duplex variant of MMDVM_HS_Hat. 6- Plug a USB keyboard, a USB mouse and an external monitor using the HDMI connector. This is a purely hardware solution that puts several components that are useful for amateur radio projects on a single board; namely a high-performance sound chip (CODEC), a GPS with pulse per second (PPS) that includes an embedded battery backed real-time clock (RTC), and a 12VDC power circuit to power the onboard. Fing Device Recognition technology can identify billions of devices to reveal the make, model. Currently the repeater is available in the FM branches of the firmware and the host. What you configure here will appear in your BM Dashboard at brandmeister. If you setup MMDVM_Bridge. VHF/UHF Dual-band Digital/Analog Part 90 DMR commercial transceiver with 1. On your computer, open Putty and enter. This protocol is designed by a HAM for HAMs. 5″ color touch screen display with laser cut and powder coated aluminum case. Initially it will support D-Star and DMR, with System Fusion and P. Shop at ACE Hardware at 1900 Cordova Rd, Fort Lauderdale, FL, 33316 for all your grill, hardware, home improvement, lawn and garden, and tool needs. First open the "expert" tab and then click "SSH Access. There's been a lot of discussion about MMDVM_HS ripping off ZUMspot and Chinese hotspot manufacturers ripping off everyone. About MMDVM. Notes changed from to MMDVM hardware. If you have questions, please ask them on our forum or in email. The silkscreen is properly placed and our callsigns are clearly readable. OpenGD77 - Hotspot mode Announcing - OpenGD77 firmware - Phase 1 DMR MMDVM duplex hotspot Investigating a RCWL 9196 / RCWL-0516 "Radar" motion detector module Top Posts. Using the I2C interface OLED displays provide a great way to display text, shapes or images on a tiny screen. for Upgrading MMDVM_HS_Hat board connected to GPIO you have to enter the command: sudo pistar-mmdvmhshatflash hs_hat. NX4024T032 is a powerful 3. 16 Updated frequently. Those familiar with open source hardware and software probably already see what has happened here. The first one is an original board revision 1. With that out of the way, onto the details. and mimics all the Wires-X commands and functionality. 5KByte RAM, 65k colors. After purchasing the Dual MMDVM Board and having excellent results using it both as a dual band repeater on 2M and 70CM I turned my attention to the New N5BOC MMDVM Simplex board which came with the Ceramic Antenna fitted. The transition from an analog state-of-mind for all hams is kind of a stretch. In addition to that there is the Open Source Hardware (OSHW) logo on the lower left. The "HAT" is an add on (Hardware Attached on Top). If you need to customize these, you can approach the company who produced them: GM Voices. There were no sunspots over this reporting week, February 6-12. If you have Nextion LCD, please send your e-mail address to the following e-mail address. This means no Linux, no bulky Windows software, no failing SD cards – but extreme durability, reliable operation and fast bootup. Open Source and Creative Commons. This will allow any device connected to the DMRPlus network, including commercial Motorola or Hytera repeaters, homebrew MMDVM repeaters or base stations, the upcoming DV4mobile and DV4mini users worldwide to access users on either the DMRPlus or DMR-MARC networks. The firmware for TNC-Pi was based on the original TNC-X open source code by John Hansen, W2FS as modified by John Wiseman, G8BPQ to support the I2C protocol as well as the original serial port connection. MMDVM is composed of two physical parts. Google Earth KML ? Data export tool. Edit the following for the operation matches the platinum MMDVM I realized (PCB printed "PCB designed by F5UII 07. Key D2RG members Yuan BG3MDO and Andy CA6JAU have the MMDVM_HS-AMBE's in hand and are starting work on getting them up and running with firmware and any hardware mod's that need to be done. com features all 4 modes, Wifi and a "set it and forget it" style operation. This board, plus a platform running MMDVMHost is all that is required. Key D2RG members Yuan BG3MDO and Andy CA6JAU have the MMDVM_HS-AMBE's in hand and are starting work on getting them up and running with firmware and any hardware mod's that need to be done. , Shenzhen, GD, China Postal Code: 518000 China Telephone: +86-755-27955416. The first one is an original board revision 1. 069 miembros. Notes changed from to MMDVM hardware. SainSmart MMDVM 2 Channels Hot Spot Shield with OLED+MMDVM Hotspot Spot Radio Station Antenna, Support P25 DMR YSF D-Star UHF WiFi Digital Voice Modem Suitable for Raspberry Pi-Zero W, Pi 3, Pi 3B 3. The rollout has already started and will be completed over the next few weeks. Net c-Bridges currently supports 55 plus MotoTRBO repeaters with 30 plus plus in Washington, 5 plus in Oregon and 2 in Idaho. rpmnew and will not alter the existing /etc/ntp. It runs off 12V and the folks at Micro-Node told me the box is intended to work off vehicle power so just fabricating or buying an appropriate car power socket to the coaxial power jack on the Nano-Spot should get it powered for you. Rename directory in MMDVM; Configure the MMDVM software. The network interfacing part, that connects to the reflectors, Talk Group Brandmeister or YSF Reflector : MMDVM. Buy with confidence. MTR2000 and STM32-DVM-MTR2K: Analog + Digital, Playing Nice Together Cort Buffington MTR2K May 28, 2019 (Editor’s note: This is the third installment of our series of posts on the Motorola MTR2000 repeater and MMDVM board. It has a built-in battery and supports. TSQ changed from 136. cpu: hardware has 6 breakpoints, 4 watchpoints. Mostly used by private network and local police, can be encrypted. MMDVM open-source Multi-Mode Digital Voice Modem Description: The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem, which utilities the power of an ARM processor and a simple analogue interface board. Miniature displays are great fun The possibilities are truly endless. " Login with the pi-star user. com DVMEGA Dutch hotspot RF boards, works with G4KLX software, so similar experience to MMDVM products. Phew! That's it! All done! I really hope you. But, I got tired of having to need a computer to change modes and got the idea to get 3 mmdvm "Jumbo Spots" to be able to run all 3 modes simultaneously using widely spaced different RF frequencies in the 430 thru 450 band. “This is the source code of the MMDVM program/daemon that supports D-Star, DMR, System Fusion, P25, and NXDN modes via the UDRC Pi interface. ***Note: This case does not have a fan and the Pi-4 is known to run hot under use. A printable robot arm, a little bigger than the usual hobby servo once. Use of this software for commercial purposes is strictly forbidden. and your Pi-Star Dashboard should appear. Despite our best effor ts, the MMDVM revision 1. –MMDVM servers stream one talkgroup at a time •Compliance –Users are transmitting on PNW repeaters •Troubleshooting –Users are connected to PNW repeaters and systems, some of which are primary-SAR usage •Cost: $0. Together, a trial version of small digital all-mode repeater capable of full duplex D*Star, DMR, NXDN, P25, POCSAG, and Yaesu System Fusion should be the result. 850 MHz Color Code 1 Time Slot 1 TG 31013 - ALERT (Full Time). 04 or other current flavors of Linux. The most recent hardware development for MMDVM is the availability of boards that have two radios and support full-duplex operation. This protocol is designed by a HAM for HAMs. 9K subscribers. So the MMDVM is normally closed contacts and the AR uses the normally open contacts. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. Various board versions available; most popular are the ZUM board and ZUMspot. MMDVM is an open-source Multi-Mode Digital Voice Modem. Firmware not detected Som people have issues with the "firmware not detected" message when run the DVMEGA on a Raspberry PI uysing MMDVMhost software. tft file to a formatted MicroSD card. 5" TFT 480x320 resistive touch screen display, 16M Flash, 3. Get Fingbox for more advanced security and protection for your network. Aluminum Shell x1 6. That is what I will be exploring next. Billed as the world's oldest computer festival, TCF19 was the 44th year in which many hobbies converged which show how ubiquitous computers and wireless technology has become. We have had the repeater running Arduino Due's and STM32 M4 and M7 hardware, and it certainly loads onto an NXP M4 (Teensy 3. We have affiliated networks for another 10 plus repeaters in Washington, Oregon and. The Jumbospot costs about $45 and I've heard tales of people getting them for $35. Permalink for Repeaters, including all WIA Port B. Screen You can connect an OLED 1. Das Open-Source-Projekt wird von Jonathan (G4KLX) entwickelt und über GitHub bereitgestellt. Paired with a Raspberry Pi and the MMDVM software becomes a The Vero Telecom VGC VR-N7500 is a brand new 50watt VHF/40 watt UHF Headless ham transceiver with a solid buil. ( In STOCK and more on the way ) This option adds 2 short dual band antennas. adapter speed: 1800 kHz. The Nano-Spot from Micro-Node. 7 Here you will find user manuals, device drivers and softwares for a wide range of our products. MMDVM hotspot board x1 4. Rename directory in MMDVM; Configure the MMDVM software. The firmware for TNC-Pi was based on the original TNC-X open source code by John Hansen, W2FS as modified by John Wiseman, G8BPQ to support the I2C protocol as well as the original serial port connection. The iburst directive at the end of each line is to speed up the initial synchronization. I know the hardware for all 3 mmdvm's is good, because "walking" the SDHC chip for the YSF configured mmdvm0 into the other two results in them working just fine running FUSION. Open Hardware Summit 2018 Recap This past week in Boston was the Open Hardware Summit on the beautiful campus of the Massachusetts Institute of Technology. MMDVM "This software is licenced under the GPL v2 and is intended for amateur and educational use only. com DVMEGA Dutch hotspot RF boards, works with G4KLX software, so similar experience to MMDVM products. But, I got tired of having to need a computer to change modes and got the idea to get 3 mmdvm "Jumbo Spots" to be able to run all 3 modes simultaneously using widely spaced different RF frequencies in the 430 thru 450 band. Mostly used by private network and local police, can be encrypted. The ZUMspot and MMDVM_HS_HAT creators use this Open Source Hardware license. ini sets up a MMDVM configuration which isn’t much different than setting up the parameters on a hotspot just without the radio. It has HSMM also known as Hammnet which is an option to connect the device to the internet. This is a pre-fixed version of the image, with an improved version of the update tool to make sure we never get hit by this again. 2 manufactured by us. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. All designs will be contributed on MMDVM open source project. This allows educators, makers and first-time explorers of RPi to more quickly get started with the General Purpose Inputs and Outputs (GPIO). Switch to a different DAPNET-node. Here is a brand new device for your digital radio pleasure. Receives data at the UART interface, sent from the Raspberry Pi and toggles the LED. Current Version as of July 22, 2018: v3. In most cases, this involves either downloading and manually installing the default driver, or a driver that has been modified by using the utility found with AN200, here: https. Based on the experiences with the DSTAR and DMR, other reflector systems for several other Digital Voice modes were implemented, Netfusion, APCO25, dPMR, NXDN. DXMINI v2 MMDVM HotSPOT March 6, 2020 Multi-Mode Digital Voice Modem fully assembled with 3. All 40 header pins are. 7 Here you will find user manuals, device drivers and softwares for a wide range of our products. 1uF disc ceramic capacitor across the solder pads that go to the battery contacts. Rename directory in MMDVM; Configure the MMDVM software. TSQ changed from 136. The PNWDigital. If you're looking for the new Raspberry Pi 3 Model B+ then you can find that here: Raspberry Pi 3 Model B+ GPIO 40 Pin Block & PoE Header Pinout pi3_gpio. Your help will be appreciated. The TNC-Pi 2 is designed to perfectly match the form factor of the Raspberry Pi B+, Pi2 and all Pi 3 models. We've included releases from the past below as well in case you need to work with a previous build of Windows 10 IoT Core for your device. 2019 Mercedes Sprinter Van: Here’s What We Know January 25, 2018 by Jerry Hirsch , @Jerryhirsch The third-generation 2019 Sprinter van will replace the previous model that Mercedes has sold. OpenWrt for Raspberry Pi 2 is compiled with the ARM hard-float kernel ABI (armhf). It kept losing the connection to the DMR Master server. Raspberry Pi 2 & 3. I also have problem with opengd77 to sometimes enter local mmdvm repeater, which I never have with factory firmware. Unable to open serial port on vpty: ttyMMDVM0 I am assuming this indicates that it is not properly configured for the UDRC. This device is extremely durable and a great addition to your shack and mobile operation. Radio Hacking: Cars, Hardware, and more! - Samy Kamkar - AppSec California 2016 - Duration: 51:12. To help distinguish between an orginal #MMDVM_HS_Hat and a clone have a look at the two pics below. Expanded Information. Type "ping 10. Its relatively new and not many users on the C4FM reflectors but that will grow over time. Newegg shopping upgraded ™. Upgrade the firmware of your MMDVM-Hardware for Upgrading MMDVM_HS_Hat board conected to GPIO you have to enter the command: sudo pistar-mmdvmhshatflash hs_hat. •Proven hardware DVMega good track record •BlueDV software available for Android and Windows (IOS is testing) •Bluestack hardware with DVMega: small size good for mobile •BlueDV software shows real time info: TG/Ref, callsign, name, last heard •Very easy setup: connect Mega to BlueDV, install software, enter info. This allows a more basic Arduino to be used as an external controller for the MMDVM, including the mode pins, lockout pin, TX pin and an optional external Nextion display driver. Assemble the hardware The DV-Mega comes with basic fitting instructions which explain how to fit the modem board to the Raspberry Pi. N4IRS See Tait Series II data modifications. INI, so check two or three times the parameter. Currently the repeater is available in the FM branches of the firmware and the host. The principal attraction? Low cost. It is therefore critical to stay consistent and follow standards. (A different version of D-STAR could be created using codec2, but it wouldn't be compatible with the existing version of D-STAR using the AMBE codec made by DVSI. Reboot the RT3S, we can check the current firmware version. The Open Hardware Foundation (OHF) came into being as on offshoot of the Open Graphics Project. •Free DV -open source spec. It will take a few minutes, please be patient. Reflector 30 has been moved to Amazon Web Service and is providing great reliability. This is a purely hardware solution that puts several components that are useful for amateur radio projects on a single board; namely a high-performance sound chip (CODEC), a GPS with pulse per second (PPS) that includes an embedded battery backed real-time clock (RTC), and a 12VDC power circuit to power the onboard. The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem, which utilities the power of an ARM processor and a simple analogue interface board. The Nano-Spot from Micro-Node. Open hardware. For the USB peripheral, there’s a lot of common ground with the Kinetis peripheral, but there are some key differences. We have had the repeater running Arduino Due's and STM32 M7 hardware, and it certainly loads onto an NXP M4 (Teensy 3. However, if there is a hardware problem — like a damaged network card or router — then you will have to contact a technician. I know are sticks and stones but for many could be a high reliable system. Raspberry Pi – Acts as the UART transmitter. 99999999% of the planet's population do not have the ability to solder SMD components. It runs off 12V and the folks at Micro-Node told me the box is intended to work off vehicle power so just fabricating or buying an appropriate car power socket to the coaxial power jack on the Nano-Spot should get it powered for you. A close look at an MMDVM Hotspot and what makes it tick. 0 board The MMDVM-Pi hardware radio interface is part of the Multi-Mode Digital Voice Modem open source project. With that out of the way, onto the details. (A different version of D-STAR could be created using codec2, but it wouldn't be compatible with the existing version of D-STAR using the AMBE codec made by DVSI. “This is the source code of the MMDVM program/daemon that supports D-Star, DMR, System Fusion, P25, and NXDN modes via the UDRC Pi interface. A Place to have a collaborative discussion about : mmdvm_hs_hat, 3Dprinted case, setup, This group is a "Special Interest Group" and as so it is intended to inform members with the latest news and support regarding the Amateur HAM Radio MMDVM Hotspots, the use for HAM-Radio solutions It is a group by HAM operators for (candidate) HAM operators. Current Version as of July 22, 2018: v3. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes 1. ) Many personal, low-power hotspots are boards that mount on computers like the Raspberry Pi, one is an all-in-one board, and some others are thumb drives that. There is now a growing list of YSF reflectors that are open to home brew devices such as MMDVM, DV4Mini etc. Now this is interesting from our friend Shawn. 2 manufactured by us. Digital Mobile Radio (DMR) is an open digital mobile radio standard defined in. Free delivery and returns on eligible orders. 2'' HMI, which is member of Nextion family. The Brandmeister Network is the commonly associated with Hot Spot operation, while the DMR-MARC network is associated more with repeater operation. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. In this video I dismantle a hotspot, show you the hardware and talk about the benefits of these fantastic little hotspots. Presentation: Digital Hotspot Pi-Star MMDVM Hardware Overview Joe N1JTA gave a presentation as part of a workshop at the Trenton Computer Festival on March 23rd. A P25 radio must, as a minimum, transmit or receive messages using the the standard values for. The transition from an analog state-of-mind for all hams is kind of a stretch. Diese ist kostenlos erhältlich und basiert auf dem. nicely built board with gold plated through holes. The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem,which utilities the power of an ARM processor and a simple analogue interface board. Do you want to join the growing list of DMR repeaters being used on DMR-MARC? Select an ARNS-DMR. Net c-Bridges currently supports 55 plus MotoTRBO repeaters with 30 plus plus in Washington, 5 plus in Oregon and 2 in Idaho. dl5di/OpenDV - A collection of Open Digital Voice software for Amateur Radio based on Jonathan Naylor's G4KLX various projects. •Free DV -open source spec. Despite our best effor ts, the MMDVM revision 1. Explore Golb. - The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. By default, SIP uses the UDP port 5060, to open the port run: sudo ufw allow 5060/udp. It has the name "MMDVM_HS_Hat" on it in the upper right part. Best of all, the hardware and software is open source! With the power of Arduino, you can use the HamShield to build and invent amazing things in minutes! Here are some examples, right out of our sketch toolbox: MMDVM - Multi-Mode Digital Voice Modem. Raspberry Pi – Acts as the UART transmitter. POV Display on Flexible PCBs! A BB Q10 Keyboard in PMOD format! An attendance system based on Arduino and RFID reader which will save attendance data in real-time to Google spreadsheet. x" with the IP address or host name of the computer you want to ping. Update MMDVM HS Duplex firmware. NE, United States. The principal attraction? The Jumbospot costs about $45 and I've heard tales of people getting them for $35. You also will have to find the mmdvm software image and do the programming in Linux to get it setup and working. ini” , a working. Product Description: The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem, which utilities the power of an ARM processor and a simple analogue interface board. Hit the enter key. Hardware Connection. Micro-Node will continue to honor and support current customers and products that are under warranty. - The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem,which utilities the power of an ARM processor and a simple analogue interface board. The first one is an original board revision 1. Setting up a MMDVM Hotspot with Raspberry Pi (Coming Soon) In addition to this website of course, here are some other good places to find more information on the RaspberryPi and related items: AdaFruit. The NPR protocol is designed to transfer IP data over radio links, in a bidirectional way (single frequency). Annapolis AllStarLink HUB hardware: Any questions please visit the Contact Us page. Uli, Do not worry about the Dashboard. Shop at ACE Hardware at 1900 Cordova Rd, Fort Lauderdale, FL, 33316 for all your grill, hardware, home improvement, lawn and garden, and tool needs. MMDVM stands for Multi Mode Digital Voice Modem. Note: All designs will probably be contributed on MMDVM open source project. docx Author: i7 Created Date:. MMDVM hotspot board x1 4. For more information you may call 702-528-4700. The MMDVM-Repeater board is a lot like a hotspot, except it doesn’t have a radio built onboard. All designs will be contributed on MMDVM open source project. STE is designed to use ISDN telephone lines which offer higher speeds of up to 128 kbit/s and are all digital. 1a) Background. hardware DMR KE4GJG Richard Hyde MMDVM DSTAR raspberry pi C4FM fusion This project was created on 05/06/2016 and last updated 2 months ago. A printable robot arm, a little bigger than the usual hobby servo once. on the Raspberry Pi 2/3/4. IRLP Users Notice Please read! Due to constant bouncing of Yahoo. 5'' HMI, which is member of Nextion family. Bruce makes a strong argument that an Open Source vocoder needs to be developed. We're going to show you how to configure the display for the first time, download the needed resources, and how to integrate it with the Arduino UNO board. All the features of a duplex board without having to sacrifice the convenience of the Pi Zero form factor. DXMINI v2 MMDVM HotSPOT March 6, 2020 Multi-Mode Digital Voice Modem fully assembled with 3. - The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. Using the I2C interface OLED displays provide a great way to display text, shapes or images on a tiny screen. I just don't understand the logic of open hardware that uses the CC non-commercial tag. Here’s a rundown of the features of the STM32 peripheral: The USB Peripheral manages transferring data to and from the host for up to 8 bi-directional. MMDVM-Pi rev. Contribute to phl0/MMDVM_HS_Dual_Hat development by creating an account on GitHub. The design concept is simple, provide the complex services and configuration for Digial Voice on Amateur radio in a way that makes it easily accessable to anyone just starting out, but make it configurable enough to be interesting for those of us who cant help but tinker. Using a Icom ID-51a Plus 2 in terminal mode with the new beta version of Pi-Star 4. For those fans who have no MMDVM hardware, this firmware also make it possible to receive digital voice packets from the network and make your RaspberryPi into a digital receiver. The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem,which utilities the power of an ARM processor and a simple analogue interface board. This firmware is build upon great open source projects, it's free for amateure radio operators and you can get the source or report issues through GitHub. 9, Banri wowi, Tongsha Road No. Uli, Do not worry about the Dashboard. 16 or later. I will be using the one I have already, a Pi 3B. 00 •Peter is open –no registration required. 5'' HMI, which is member of Nextion family. 0 of Pi-Star (as of Jan 25, 2019 in beta RC3) it is possible to use pi-star and an Icom ID-51a Plus 2 in DV terminal mode as a D-Star Repeater with Pi-Star as the controller. ) Everything about D-STAR but the codec is an open standard. Edit the following for the operation matches the platinum MMDVM I realized (PCB printed "PCB designed by F5UII 07. 4 GHz and 5 GHz wireless LAN, Bluetooth 4. Package content: 1. 2'' HMI, which is member of Nextion family. MMDVM hotspot board x1 4. Nextion - The Newest HMI Solution Touch Screen Display For Arduino Development - YouTube. In order to create our own hotspot, we will need a little bit of hardware, but nothing complicated or too expensive, you will be able to get around for about 50 € to 60 €, and you can use all the equipment for other uses in parallel. The MMDVM Specification (20150922) Introduction The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem, which utilises the power of an ARM processor and a simple analogue interface board. There are many more Single-board computers without one. They are dated 20200426 or later. Next we'll update the firmware. MMDVM BUYERS Although the MMDVM Dual (full-duplex with separate transmit and receive radios) is an open-source hardware design board, locating a board with the full-duplex open-source implementation, and especially a full-duplex implementation that is endorsed by the MMDVM developers, can be difficult. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. It was new way to bridge DMR to Allstar without any hardware (expect of RPi). The INA Digital Voice Modem is combined hardware and software, developed to handle all amateur digital voice modes. Tait Enable is a revolutionary suite of software and hardware that places control of your radio network firmly in the palm of your hands. It should also be noted that there is a current limit on the USB ports of 500mA, so any current draw greater than this might cause instability. The G4KLX MMDVM software is very flexible, open source and continuously being improved. I have two gd-77, one with opengd77 firmware and other with factory firmware. The first one is an original board revision 1. Here is a project involving a ZUM Radio duplex MMDVM and a Raspberry Pi 3 B+ combined with my trusty old Yaesu FT-7900 and FT-7800 radios, and a couple of mini-DIN cables. MMDVM :: Open Source - Multi-Mode Digital Voice Modem. - In May 2012 is from Bryan Hoyer, K7UDR / NW Digital Radio, a new design approach to a high speed UHF data radio, the proposed UDRX-440. be's photos on Flickr. This will allow any device connected to the DMRPlus network, including commercial Motorola or Hytera repeaters, homebrew MMDVM repeaters or base stations, the upcoming DV4mobile and DV4mini users worldwide to access users on either the DMRPlus or DMR-MARC networks. All 40 header pins are. Pi-Star - this update breaks the install on Pi-Star and casuse the dashboard to fail to be available. ‘Voice Wide’ is a digital mode with greater audio fidelity than ‘digital narrow’. Currently the repeater is available in the FM branches of the firmware and the host. Now you know. At the risk of being redundant, I'll reiterate that all of my radios for all 3 digital modes continue to work just great on T and R with the OpenSPOT. One major premise of this design is the use of a commercial speaker stand from the music/sound. The silkscreen is properly placed and our callsigns are clearly readable. Our network is an all-digital group of over 500 DMR-MARC repeaters in 83 countries with over 144000 registered users. They are dated 20200426 or later. First, it is a Raspberry Pi HAT. Newegg shopping upgraded ™. The difference between Jitsi and Jitsi Meet: Jitsi is a roll-your-own solution meaning you can download server packages or code and deploy an instance. It does not need a computer, a Raspberry Pi®, an Arduino® board, SD card or any other hardware to operate. MMDVM stands for Multi Mode Digital Voice Modem. Buy Hima MMDVM Antenna For Raspberry Pi + Hotspot Pi-Star Support P25 DMR YSF Module at Amazon UK. ) and ASCII text based instructions. com DVMEGA Dutch hotspot RF boards, works with G4KLX software, so similar experience to MMDVM products. With all of the features we know and love of Raspberry Pi Zero W; the new Raspberry Pi Zero WH is the same board that also includes professionally soldered headers. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. 0 Height=0 Location. 6), but not tested on that platform. This leads to a huge server load. Fully assembled and tested in a ruggedized aluminum enclosure. The software pieces are ASL (Allstar Link), Analog_Bridge, ircDDBgateway, MMDVM_Bridge. Southeastern US D-STAR Weather Net. The Header Code Word and Link Control Word (LDU1) contain the 8 bit MFID field. net as well as custom domains using Yahoo. MMDVM open source software must be installed on the Teensy before use. - Open a terminal window - Type "sudo apt-get install git" (git tool will be installed now) - When compilation is done you have to set your MMDVM. 4,000 Channels with 10,000 Talk Groups. jpg Image: eBay 3. 0 RC3 and a Raspberry Pi for D-Star. The MMDVM-Repeater board is a lot like a hotspot, except it doesn’t have a radio built onboard. Download open dmr hardware & software platform for free. Various board versions available; most popular are the ZUM board and ZUMspot. While you can build everything on your own from the ground up, from the Raspberry Pi OS to the MMDVM software (and the author of this article has done that in the past), it is much simpler to install the Pi. This year OSHWA partnered with the Engelberg Center on Innovation Law & Policy at NYU Law to host the event in New York City. Those familiar with open source hardware and software probably already see what has happened here. Next we'll update the firmware. Fake/clone MMDVM_HS Boards. for Upgrading MMDVM_HS_Hat board connected to GPIO you have to enter the command: sudo pistar-mmdvmhshatflash hs_hat. With MMDVM it became easy and cheap to set up repeaters without commercial hardware. , Shenzhen, GD, China Postal Code: 518000 China Telephone: +86-755-27955416. 2" TFT 400x240 resistive touch screen display, 4M Flash, 2KByte RAM, 65k colors. OpenGD77 - Hotspot mode Announcing - OpenGD77 firmware - Phase 1 DMR MMDVM duplex hotspot Investigating a RCWL 9196 / RCWL-0516 "Radar" motion detector module Top Posts. 3″ screen to the board. Info : Unable to match requested speed 2000 kHz, using 1800 kHz. BlueDV for Windows beta ( DMR, DSTAR and Fusion ) BlueDV for windows is free DMR /DSTAR/Fusion hotspot software for your PC. MMDVM-Pi rev. Update: Jason, KE7FNS, has found at least a partial root cause for this issue and a workaround solution for that cause, which he shared in his Pi-Star User Forum post: K, so looks like it has to do with files. This device is extremely durable and a great addition to your shack and mobile operation. Homebrew D-STAR Jim Moen • New Software and hardware approaches -Open Source, easy to embed in projects -If one manufacturer made CODEC2 DV radios, there'd be an explosion of creative add-on functions -These things take time. If upgrading from a previous minor release, and your /etc/ntp. Additional note by VK2AMV, Be very careful of DC leakage into buffer effecting Op Amp DC bias. Keep in mind that there is a red LED that stays on whenever power is connected, whether the pi is running or not. It is not recommended to run the Pi-4 at full power for extended periods as performance problems can arise at higher temperatures. I know are sticks and stones but for many could be a high reliable system. Introduction Pi-Star is great software for digital voice hotspots and repeaters. MMDVM-Open Source Multi-Protocol Digital Voice Modem ZUMSpot-Radio Module Board (UHF Transceiver) For Pi Hat Raspberry Pi-Credit-Card-Sized Computer (P2, Pi3, Pi-ZeroW) Pi-Star-Custom Software Image For Pi (Raspbian + MMDVM) Page-3 Better Together-Hardware + Software 4. Note: All designs will probably be contributed on MMDVM open source project. If you love Pinout, please help me fund new features and improvements. DRAWS is a platform with multiple components. The first one is an original board revision 1. 2 manufactured by us. The Multi-Mode Digital Voice Modem is a combined hardware and software development of a modem to handle all amateur digital voice modes. RPi “images” Completely Open Source. Join our global community of technology leaders working together to break open the black box of proprietary IT infrastructure to achieve greater choice, customization, and cost savings. USB powering should only be attempted using a stable 5V supply. Tato destička se nasadí na Arduino Due, se kterým tvoří kompletní modem. Note that this setup is for the DVMega, although it mainly focus's on installing the PI-Star image on to your Raspberry PI3. RPi "images" Completely Open Source. These include screen savers, web browsers, instant messengers, etc. Let's do it. 25) and HSMM-Hamnet with Wifi equipment. Mark has decided to retire so Micro-Node will no longer be providing new product sales. •Ramesh Dhami, VA3UV, developed Freestar (open source) and also provides an image download for the Raspberry Pi –Link •Jonathan Naylor, G4KLX, developed programs (open source) that are probably the most used hotspot software today. About MMDVM. 2'' HMI, which is member of Nextion family. This MMDVM for Raspberry Pi 3B and 3B+ provides a multimode digital access point: D-Star, DMR, C4FM, P25, POCSAG and NXDN. MMDVM is composed of two physical parts. 9K subscribers. This means that non-integer math is done in hardware instead of in software. Since the PI-REPEATER-X family of controllers only uses the GPIO and standard logic buses (I2C, SPI, I2S), the hardware is compatible with any operating system you want to use, and any controller software that can interface with the logic buses and GPIO pins. Firmware open sourced; Several choices but Pi-Star most popular; Pi-Star - Software Image/Appliance. POCSAG is an acronym for Post Office Code Standardization Advisory Group which developed the code for the British Post Office. There is now a growing list of YSF reflectors that are open to home brew devices such as MMDVM, DV4Mini etc.