Open-source remote radio control ecosystem for modern HAM operators. Control HF and SDR radios from anywhere — browser, phone, or native iOS app.
Choose by your radio hardware first, then by your preferred client.
| I have... | Use | Why |
|---|---|---|
| Any HF radio with CAT | MRRC | Universal remote control via Hamlib/rigctld |
| Yaesu FT-710 | MRRC FT-710 | Software SCU-LAN10 replacement via one USB cable |
| SunSDR2 DX | SunMRRC | SDR server with UDP IQ demodulation and real-time waterfall |
| iPhone + SunSDR2 DX | SunsdrMobile | Native iOS client built on top of SunMRRC protocol |
Four open-source remote control projects — universal HF rigs, SDR platforms, and native mobile apps.
Universal web-based remote transceiver control. Works with any HF radio via Hamlib/rigctld. Opus-optimized audio, WDSP noise reduction, AI voice assistant, CW/FT8 digital modes, studio-grade TX audio processing, and 3-layer PTT safety.
Software SCU-LAN10 replacement for the Yaesu FT-710 HF/50MHz transceiver. Real-time waterfall spectrum via FT4222 SPI at ~21fps, bidirectional Opus 48kHz audio, full CAT control over 4 WebSocket channels — direct serial, no Hamlib needed.
SunSDR2 DX-specific FastAPI backend server. Server-side IQ demodulation, real-time 512-bin FFT waterfall, dual-codec Opus/PCM audio, TX SSB voice modulation via Hilbert transform, per-band DRIVE power control, and 5 WebSocket endpoints for web and native clients.
Native iOS SwiftUI app for SunSDR2 DX remote control. Connects to the SunMRRC backend for real-time spectrum waterfall, low-latency audio, DSP noise reduction, one-touch PTT, 3×3 channel memory grid, and Keychain-secured auto-login. Zero third-party dependencies — pure Apple frameworks.
Different hardware demands different architectures. Our projects span the full spectrum — from traditional CAT-controlled HF rigs to direct-IQ SDR transceivers and USB-native devices.
Why three approaches? Traditional HF radios expose a serial CAT interface. The FT-710 adds FT4222 SPI for real spectrum data — no SCU-LAN10 dongle needed. The SunSDR2 DX streams raw IQ samples over UDP, requiring server-side demodulation. Three different problems, three different solutions, one shared design system.
MRRC evolved through real operating cycles, then accelerated SunMRRC and SunsdrMobile through reusable architecture assets.
Project metrics and architecture facts visible before deployment decisions.
All projects are open source. Dive into the documentation, try the live demos, or deploy your own instance.