====== Introduction ======

[[fldigi]] is a software package for running a subset of amateur radio digital modes. [[BPQ]] can interface with fldigi to either allow users to connect or [[forward messages]] using other modes than [[AX.25]].

To make integration easier, you can use a rig control package like [[flrig]] to allow both BPQ and fldigi to control the radio on specific port(s).

====== Bare Bones Example in Windows ======
This example uses an IC-7300 plugged into a Windows computer, using QtSoundModem to interface the radio to BPQ.

===== Software =====
  * [[BPQ]]
  * [[flrig]]
  * [[QtSoundModem]]
  * [[fldigi]]

===== Steps =====
  * Set up flrig to interface/CAT control your radio.
      * The Server `Xmlrpc` port is used in the QtSoundModem PTT config in the next step.
  * Set up a regular HF BPQ port if you want. In this example, you can use QtSoundModem and use the `FLRIG` PTT port, which is not available in the [[UZ7HO Soundmodem]] this software is based on.
  * Set up and start fldigi to act as a server.
      * The KISS `Addr` is the machine running BPQ.
      * The `I/O` port is used in the BPQ port config, below.

{{::flrig-server.png?direct&600|}}


  * Set up an //additional// port that uses the BPQ fldigi driver, but on the same radio.
    * The `ADDR` is of the machine running fldigi and the fldigi port.
    * You can set the default mode as in the [[https://www.cantab.net/users/john.wiseman/Documents/FLDigiDriver.html|BPQ fldigi Driver docs]].

<code>
;**************   Port 7 FLDIGI PSK  *************;
PORT
  PORTNUM=7
  ID=FLDigi
  DRIVER=fldigi
  PACLEN=64
  CONFIG
    ADDR 192.168.0.6 7342
    TIMEOUT=10
    RETRIES=5
    DEFAULTMODEM BPSK125/1700
    UPDATEMAP
ENDPORT
</code>

  * See [[https://www.cantab.net/users/john.wiseman/Documents/FLDigiDriver.html|BPQ fldigi Driver docs]] for example connect scripts, that should also work for forwarding.

====== References ======
  * [[https://www.cantab.net/users/john.wiseman/Documents/RigControl.html|BPQ Rig Control docs]]
  * [[https://www.cantab.net/users/john.wiseman/Documents/FLDigiDriver.html|BPQ fldigi Driver docs]]
    * fldigi screenshot is out of date as of 2025-09
  * [[https://packet-radio.net/fldigi-and-bpq32/|packet-radio.net instructions]]
      * Basis for this page
  * [[http://mail.w1hkj.com/FldigiHelp/config_io_page.html|fldigi Configure ARQ/KISS I/O docs]]
  * [[https://www.cantab.net/users/john.wiseman/Documents/QtSoundModem.html|QtSoundModem]]
  * [[http://uz7.ho.ua/packetradio.htm|UZ7HO Soundmodem]]