C4FM Multiprotocol Server

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===== Recommended configuration of the DR-1X repeater =====

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).\\
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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.\\
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==== Required components ====
very good experiences have been made with the following hardware:\\

  * Raspberry Pi 4B
  * Repeater-Builder STM32_DVM_USB (MMDVM-Board)
    * [[http://www.repeater-builder.com/products/stm32-dvm.html]]
  * pistar-ea by Manuel EA7EE  (//**DG-ID FULLY SUPPORTED**//)
    * [[http://pistar.c4fm.es/]]
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required parts for the connection cable:\\
  * 15pin D-Sub connector (male)  //(for connection to DR1-X [CONTROL I/O] connector)//
  * 9pin D-Sub connector (male)  //(for connection to STM_DVM_USB MMDVM-Board)//
  * piece of well-shielded cable

//Please do not use a VGA screen cable, as not all of the required connections are usually contacted here.//
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==== Wiring of the connection cable ====
Please note the information in the following documents:\\

  * DR-1 REPEATER, BASE and REMOTE Mode Operations
    * {{ :ycsserver:dr1x:dr-1_repeater_base_and_remote_mode_operations.pdf |}}
  * STM32_DVM_USB Schematic
    * [[http://www.repeater-builder.com/products/pdfs/STM32_DVM_v4.pdf]]
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Pin assignment of DR1-X [CONTROL I/O] connector:\\
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{{:ycsserver:dr1x:dr1x-connector.png?400|}}\\

| **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) | | | |
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==== Configuration of DR1-X ====


  * Set **"UP LINK"** to **Packet Speed 9600bps**
  * Set **"Deviation"** to **WIDE**
  * Set **"Remote Operation"** to **ON**
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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:\\   
 
  * RB_DR-1x setup.pdf
    * [[http://www.repeater-builder.com/products/pdfs/RB_DR-1x%20setup.pdf]]  
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