Table of Contents

Unfortunately, the DR1-X repeater does not offer a LAN interface to be able to be connected directly to a network. Furthermore, its internal repeater control does not support DG-ID (System Fusion II).

However, the DR1-X with its [Control I/O] connector offers the option of using an external repeater control, for example an MMDVM modem. (Attention: DR1-XFR not supportet)
This expansion can be carried out without interfering with the repeater hardware and turns the DR1-X into a full-fledged mmdvm repeater, which now also supports DG-ID (System Fusion II) and can be connected directly to a YCS server.


Required components

very good experiences have been made with the following hardware:


required parts for the connection cable:

Please do not use a VGA screen cable, as not all of the required connections are usually contacted here.

Wiring of the connection cable

Please note the information in the following documents:



Pin assignment of DR1-X [CONTROL I/O] connector:


PIN [CONTROL I/O] Description Comment PIN STM32_DVM Description
1 BASE Bridge to Pin 5 [CONTROL I/O]
2 PTT 5 PTT_R
5 GND 8 GND
7 AF IN 2 TXA_R
8 DISC OUT 6 RXA_R
10 GND
11 EXT port 1 Bridge to Pin 10 [CONTROL I/O]
12 EXT port 2 Bridge to Pin 15 [CONTROL I/O] with 470 Ohm Resistor
15 Switched VCC (13.8 V)



Configuration of DR1-X


Further useful information for the configuration of the DR1-X and instructions for level adjustment of the MMDVM board with the help of pistar can be found in the following document: