Raspberry Pi DUPLEX HAT MMDVM DMR D-Star C4FM POCSAG BI7JTA Digital Radio RPI-DUPLEX-HOTSPOT-706 View larger


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This MMDVM for Raspberry Pi 3B and 3B+ 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 operates in RX and TX from 60MHz to 650MHz with 10mW max.

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

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

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89,00 € tax incl.

Out of stock, available in 10-15 days

More info

Specifications hotSPOT Duplex MMDVM RPi

Frequency: 60MHz to 650MHz
TCXO: 14.7456MHz, ± 2.5 ppm
Duplex : 2 Timeslot
Compatible with Raspberry Pi 3B and 3B +, 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


Dave on 2020-06-16

Can this just be added to a Pi 3B+?


This HAT is compatible with Raspberry PI 3B and RPI 3B+, also RPI B4 but not compatible with Raspberry PI B4+.

Jim on 2020-05-03

With a DMR ht and a Fusion ht, can this single duplex hotspot when connected to a raspberry pi 3 be used to monitor and send and receive on both digital modes ? Are the setup instructions provided?


The duplex hotspot mmdvm will work only in one digital mode at the same time.

You will find a user guide from BI7JTA website: http://mmdvm.bi7jta.org/2018/04/userguide-for-duplexhotspot-only-for.html

Stuart de G8YDE on 2020-04-21

Will this hotspot work with Raspberry Pi4?


Simplex and duplex HAT of this MMDVM hotspot work with Raspberry Pi 4 with Pi-Star 4.0+ version software.

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