Remote Operation (server)

wfview has a built-in radio server. This guide will help you configure the built-in server, which you can use to remotely access radios which lack a built-in server.


This article only applies to USB and Serial radios. For radios with built-in ethernet or wifi, simply connect wfview to the radio’s ip address. See the Getting Started chapter. So, to be clear, this article and the entire “Radio Server” page are not needed if your radio already has a network connection.

The most commonly used radio with this setup is the IC-7300, but many older rigs will work great with the wfview built-in server, which handles getting full-duplex audio and control over the network.

wfview’s built-in server handles the radio’s controls as well as full-duplex audio. Simply run one copy of wfview on a server computer, which can be anything from a humble Raspberry Pi to a full desktop PC, and run a second copy of wfview on your remote computer or laptop. The controls are very responsive and audio latency is generally under 75ms (LAN) or under 200ms (WAN).


To remotely operate a radio, you will need to run one copy of wfview on a computer connected to the radio with a USB cable (or other appropriate cables). It can be a small, single-board computer like a Raspberry Pi, or a normal desktop computer. Currently, a desktop environment is required, but a command-line server version will eventually be made available. Once connected and configured, client computers running wfview can connect over the network (internet or LAN) to the computer hosting the radio.

Server Setup

First, install wfview. Connect the radio, and then launch wfview.

Follow the Getting Started guide for serial port radios. Make sure, on the radio, that CI-V Transceive is turned on.

Once wfview is running and properly controlling the rig, head over to the Settings tab of wfview, and click on the “Radio Server” page.

Note: Do not enable the server until you have completed the setup outlined here.

The standard ports, as shown in the screenshot, are 50001, 50002, and 50003. You should use these ports unless you have a reason to use something else.

Select the radio’s receive audio device under “RX Audio Input”, and select the radio’s transmit audio device under “TX Audio Output”. If these drop-down menus are grayed out, it means that wfview has not connected to the radio yet; head over to Radio Access and make sure the Serial port has been set up correctly and then press “Connect to Radio”.

Under linux, these two names work for the server audio on the IC-7300:

  • Audio Input: alsa_input.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00.analog-stereo
  • Audio Output: alsa_output.usb-Burr-Brown_from_TI_USB_Audio_CODEC-00.analog-stereo

Generally speaking, on Windows, the audio device will say “USB Audio CODEC” in the name. Remember, you are looking for a USB device. If you see many USB Audio CODEC devices, try unplugging other USB audio devices and any other radios, and then re-launch wfview and see if you see fewer, it may help.

The Audio System should generally be set to “Qt Audio” unless there are problems with this audio system. Note that you cannot change the audio system once a client is connected; therefore, it is necessary to make sure all clients are disconnected prior to changing the audio system.

Next, define a username and password for a “Full User” account. As of wfview 1.5, user privileges are not enforced, but it is something we may do in the near future. Since the passwords are not well-encrypted, do not use a sensitive password.

If you are satisfied with the settings, press “Save Settings” and then check the “Enable” checkbox to turn on the server. You should see “udp.server: starting udp server” in the Log window. You should also see a message about the Audio Input and Audio Output devices; make sure they match your settings.

At this point, server setup is complete.

Client Setup

setting up a second computer to connect to your wfview server is simple. Launch wfview on the second computer, and follow the Getting Started guide. For the radio connection type, specify “Network”. Supply the ip address of your wfview server computer for the Hostname, along with the same control port (50001 by default), username, and password.

For the TX and RX Codec, “Opus 1ch” is the recommended choice, as it uses about 4 to 10 times less bandwidth than the 16-bit PCM formats. Note that Opus will only work if you are running a wfview server, it is a special benefit of this software.

The audio devices should be chosen for your client computer, typically a headset or speakers. Use the Qt Audio system unless you have problems with it.

Most of the details for these controls and options are covered in the Settings manual page.

Radio Settings

Your radio needs to be told to source audio from the USB or ACC connector, as applicable to your setup, so head over to the Radio Settings page of the Settings Tab, and select the audio interface that the radio should use for transmit audio. IC-7300 users should select “USB”. Older radios, lacking a USB port, will likely be connected to the computer using an ACC adapter.

See this page for details.