MMDVM Relay Board MMDVM RPT HAT Raspberry Pi Relay Expansion Board Supports Digital Relay

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Model: EB0049538
SKU: EB0049538

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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 .

MMDVM-Relay-Board-MMDVM-RPT-HAT-Raspberry-Pi-Relay-Expansion-Board-Supports-Digital-Relay-1617093

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Tags: Raspberry Pi