Raspberry Pi DUPLEX HAT MMDVM DMR D-Star C4FM POCSAG

This MMDVM for Raspberry Pi 3B and 3B+ and Raspberry PI 4, provides a multimode digital access point: D-Star, DMR, C4FM, P25, POCSAG and NXDN.

The DUPLEX version, allows to use in DMR the 2 TimeSlot or to create a mini MMDVM repeater.

The card can operate in RX and TX from 60MHz to 650MHz with 10mW max, but is restricted by Pi-star software to operate on VHF and UHF amateur radio frequencies.

Compatible with the Pi-Star application from MW0MWZ for Linux and LCD display management nextion (not included).

Delivered with: 1 MMDVM DUPLEX Hotspot board (version1.0.1 b3) for Raspberry Pi (not included), 2 antennas 433Mhz, 4-pin Nextion LCD connector.

More details

Download

Hotspot MMDVM Duplex manual (EN)

User guide v2020_12_23 in english by Winters de B7JTA. 1.8M

Data sheet

Specifications hotSPOT Duplex MMDVM RPi

MMDVM mode: DMR, YSF, P25, NXDN, DSTAR, POCSAG
Frequency: 60MHz to 650MHz
TCXO: 14.7456MHz, ± 2.5 ppm
Duplex : 2 Timeslot
Compatible with Raspberry Pi 3B and 3B+, Raspberry PI4, Pi ZERO, NanoPi NEO, Orange Pi
Power supply: 5V 2A
MCU: STM32F103C8T6
Transmitter IC: 2x ADF7021 (programmable power from -16dBm to + 13dBm)
TCXO: 14.7456MHz, ± 2.5 ppm

Design and realisation by amateur radio BI7JTA et VR2YVE.
Country of origin: China

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