Introductions:
1. This board needs to cooperate Raspberry Pi PI3, orange pie, a variety of school development board to use,Running pi-star image
2. 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 Multi-Mode Digital Voice Modem For Raspberry Pi
The Raspberry Pi expansion board running the pi-star system supports all digital modes
Descriptions:
●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. Initially it will support D-Star and DMR,with System Fusion and P.25 coming later,as well as a built-in FM repeater controller.For all modes other than DMR and FM,the modem can be used in simplex or duplex mode,while for DMR and FM full duplex must be used.
●The MMDVM is aimed at the Arduino Due,Teensy 3.1/3.2 and mbed platforms,the only requirement for the hardware is to be ARM Cortex-M3,M4,or M7 based,and access to raw interrupts and ADC and ADC ports as well as digital signalling ports.
Fetures:
- J2 For Raspberry or MMDVM Mainboard(more stable ,no tf card)
- J1 ADD TTL (RX,TX,5V(in),PWR)
- STM32F105RBT MCU
- ADD NXDN LED
- EASY UPGRADE,SHORT BOOT Jumper
- Support raspberry 's OLED
- Current Does not Support nextion TFT YET!(mmdvm Mainboard and raspberry )
- Technical support : jumbospot17.blogspot.com
- This board needs to cooperate Raspberry Pi PI3, orange pie, a variety of school development board to use
- This board has been applied in the GM300 GM3188 3688 950I 338 Vitex DR-1X
Package Included:
1 x Board
1 x Moto connection cable
FAQ:
1. After Connect GM3xx ,when power on,LED Flash fast,if your MD380 PTT Press,COS LED will ON,then you must SEE the BER using DEBUG Port,or in pi-star panel,ADJUST RX_R BER is <=2%,Then Test in Parrot you can hear your voice and PTT LED ON ,testing is Finished! It is Very Easy,I Testing Many Times.
2. what MODE you Tested ? DMR or YSF or P25 I tested is the same.
3. Does i need test Using MMDVMCal Program?If You Tested Fail,The great way using MMDVMCal to test GM3XX TX-> Mobile Function.
GM3XX RX-> Function It is Easy To Check Just COS(RECEIVE SIGNAL) LED And MODE LED,if Both LED ON ,GM3XX Rx is work!
4. Does i need to change MMDVM.ini ->TX Invent and RX Invent ?that is Also Import,in MMDVMCal TX Testing Mode you can Press I to Invent TX to Ensure Your GM3xx is invent or not .
