Recliners on the Air: Operating the Icom IC-7300 Over WiFi using SDR-Control and RS-BA1

I’ll be honest: Sometimes, the best operating position isn’t in front of the rig. Sometimes, it’s the comfortable recliner across the room, or even the back porch.

The Icom IC-7300 is an incredibly versatile radio, but most operators default to connecting it via USB for digital modes and rig control. When I upgraded to the IC-7300mk2 (or added the internal network card configuration), I decided to bypass the USB port entirely and lean heavily into its network capabilities.

This setup, which I fondly call “Project ROTA” (Recliners on the Air), allows me to operate the radio completely wirelessly from two different laptops anywhere within range of my home WiFi. Here is the architecture, the signal flow, and how I made it work.

The Architecture: Moving Beyond USB

The standard approach to operating an IC-7300 is a direct USB tether. That keeps the radio within three feet of the PC. My architecture treats the IC-7300 as a network node, similar to a network printer or a network attached storage device.

This approach offers two major advantages:

Isolation: The RF section (radio and antenna) is completely physically separated from the control section (the laptops). This simplifies cable management and reduces the potential for RF interference (RFI) to get into the computer.
Mobility: I can operate from any PC or Mac on my local network without needing a 30-foot USB cable extension (which wouldn’t work anyway without an active booster).

The Core Components

The Rig: Icom IC-7300mk2.
The Infrastructure: T-Mobile Home Internet combo Modem/Router (the network heart).
The Power: 12V Bioenno LifePO4 Battery (keeping the rig independent of AC mains).
The Antenna: EFHW (End-Fed Half-Wave) Antenna.
The Clients:
- Radio 1: M1 MacBook Air (running SDR-Control).
- Radio 2: Dell Latitude (running Icom RS-BA1v2).

Technical Breakdown and Signal Flow

The flow of signals—both RF and control data—is what makes this setup unique. Here is a breakdown of how the different parts communicate.

Flow of data and signals

   Power and RF Connections    Battery[Bioenno LiFePO4 Battery] -- "13.8V DC Power" --> Radio
    Antenna[EFHW Antenna] <-->|RF Transmit/Receive| Radio[IC-7300mk2]
   Network Core    Radio -- "Ethernet (LAN) Cable" --> Router[T-Mobile Modem/Router]
   Wireless Clients    Router -. "WiFi (Control/Audio Data)" .-> Mac[M1 MacBook Air]
    Router -. "WiFi (Control/Audio Data)" .-> Dell[Dell Latitude]
   Software Layer    "Client Software (Control Loop)"
    Mac --- [SDR-Control by DL8MRE]
    Dell --- [Icom RS-BA1v2]

How it Works: Step-by-Step

1. The “Real” Signal (RF Path)

The EFHW antenna captures faint RF signals from the air and sends them down the coax to the antenna port of the IC-7300.
The IC-7300 (a direct-sampling SDR) digitizes that RF into IQ data or processed audio internally.

2. The Bridge (The LAN Connection)

This is the critical part. Instead of utilizing the USB port, the IC-7300’s Ethernet (LAN) port is connected directly to a LAN port on the T-Mobile Router using a standard Cat5e cable.
Config Tip: For this to work seamlessly, I recommend assigning the IC-7300 a static IP address in your router’s DHCP settings if available. This ensures the control software always knows exactly where to find the radio. (e.g., 192.168.12.100). My T-Mobile router doesn’t allow that, so I used DHCP and must verify for each ROTA session that my IP numbers match (eg., between Mk2 and the laptop software—SDR-Control for Mac; RS-BA1v2 for Dell).

3. The Control Loop (WiFi Path)

This is where “Project ROTA” comes to life. Both control laptops are connected to the T-Mobile Router via WiFi using its 5Ghz radio if possible.

The Mac Experience (SDR-Control): On the M1 MacBook Air, I launch SDR-Control (by Marcus Roskosch, DL8MRE). This software is purpose-built for Icom’s LAN protocol.
- The Flow: SDR-Control sends a “connect” command via WiFi to the router. The router passes that command over the Ethernet cable to the IC-7300. The radio accepts the connection and begins streaming audio and waterfall data back up the Ethernet cable, to the router, and wirelessly to the Mac. I now have a full, real-time waterfall and audio on my Mac, completely wirelessly.
The PC Experience (RS-BA1v2): On the Dell Latitude, I use Icom’s official RS-BA1v2 remote control software.
- The Flow: Similar to the Mac, RS-BA1v2 connects via WiFi to the router, which then talks to the radio via Ethernet. This software provides a complete virtual front panel of the IC-7300.

4. The Power (Bioenno LiFePO4)

The 13.8V DC power is supplied by the Bioenno LiFePO4 battery. Since the radio is not tethered to a desktop PC via USB, using a battery makes the entire “server” side of the station (radio, tuner, SWR meter, battery) highly portable and isolated from mains hum.

Important Configuration Notes for Success

One Connection at a Time: It is vital to understand that the IC-7300 (and most network-enabled Icoms) only allows one active network connection at a time. You cannot run SDR-Control on the Mac and RS-BA1 on the Dell simultaneously. You must disconnect from the radio on one client before connecting with the other.
Network Latency: Running the radio over WiFi works exceptionally well for general operating, ragchewing, and DXing. However, for timing-critical modes (like high-speed FT8 or contest CW), you may occasionally encounter latency issues if your WiFi environment is congested. Ensure your laptops are on a 5GHz network if possible for better bandwidth.
Right now, I operate mainly digital modes on the Dell from the ROTA “shack”. Later, I plan to add some hardware (eg., a Winkeyer and a passive mixer) so I can operate CW using the M1 Mac and the SDR-Control software. The Winkeyer-mixer hardware will allow me to plug in a straight key or paddles and listen to the sidetone through USB headphones directly from the Winkeyer. The received CW signals will come from the radio via the LAN to the Mac. In my tests, there’s about a 500ms delay across the LAN and latency must be addressed. More on that planned setup later.
Honestly, I haven’t operated much SSB lately. In the future, I’d like to be setup up to do that remotely, but probably not from the recliner in the living room. I don’t want to disturb my wife when we’re in there together. However, maybe from the screened lanai or the carport chair while cooking burgers on the grill. Marcus, the developer of SDR-Control, also makes a version for the iPad which may prove even better for remote CAT control, “mic” and “speaker” all on one flat control surface. For now, those plans are still on the drawing board.

Conclusion

“Project ROTA” has been a game-changer for my operating habits. By treating the IC-7300mk2 as a network appliance, I gained the flexibility to operate from wherever is most comfortable. Whether I’m running the specialized, native SDR-Control software on my MacBook Air or the classic virtual front panel of RS-BA1 on the Dell Latitude, I am no longer tethered to the rig.

It’s efficient, simple, and makes operating on HF more enjoyable than ever.

73, and see you on the air (from my recliner)!