MMDVM relay board MMDVM RPT HAT Raspberry Pi relay + 2PC expanding board for Raspberry Pi

MMDVM RPT HAT Raspberry Pi expansion board running pi star system supports all digital modes1 This board needs to cooperate Raspberry PI3 orange pi a variety of school development board to use Running pi star image2 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 yourselfProduct 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 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 Feature   J2 For Raspberry or MMDVM Mainboard more stable no tf card J1 ADD TTL RX TX 5V in PWR STM32F105RBT MCUADD NXDN LEDEASY UPGRADE SHORT BOOT JumperSupport raspberry s OLEDCurrent Does not Support nextion TFT YET Mmdvm Mainboard and raspberry Package Included 1 x Board 2 x Expanding board s2