FT-710 Web Control β FFT spectrum plot + waterfall on iPhone
Software SCU-LAN10 replacement for the Yaesu FT-710 HF/50MHz transceiver. Real-time FFT spectrum plot + waterfall via FT4222 SPI, bidirectional Opus 48kHz audio, full CAT control over 4 WebSocket channels β no $200 dongle required.
FT-710 Web Control β FFT spectrum plot + waterfall on iPhone
A two-minute product tour of FT-710 Web Control (Chinese narration and subtitles).
Real FT4222 SPI spectrum, bidirectional Opus audio, full CAT control and multi-layer PTT safety β everything built specifically for the FT-710, no middleware anywhere.
850-point FFT spectrum at ~21 fps read straight from the FT-710 DSP chip over FT4222 SPI. The scope pipe is TX-aware: it pauses cleanly while you transmit and re-syncs in about a second on release. Automatic S-meter synthetic fallback when FT4222 is unavailable.
EMA-smoothed spectrum polyline above a 120-row history waterfall. Shared Floor/Ceil controls, six colormaps, and click-to-QSY anywhere on the spectrum.
One 48 kHz codec domain end to end: RX capture β Opus 64kbps β browser AudioWorklet; browser mic β Opus CBR β server β radio. Every platform, including Windows, bridges the 48 kHz codec domain to the FT-710's fixed 44.1 kHz USB-audio device boundary (960β882 samples per 20 ms frame).
Direct serial CAT over the Enhanced COM Port at 38400 baud. 40+ commands: frequency, 15 modes, 23 filter widths, VFO A/B, split, preamp, attenuator, NR/NB/AN, compressor, tuner, AF/RF/Mic gains.
100msβ5s smart intervals at 38400 baud, 0.25s per-query timeout ceiling, and priority preemption so PTT never waits for a poll cycle. Stale in-flight reads are discarded after user commands.
Canvas S-meter (S1βS9+60dB) with dBm readout plus full TX telemetry: PWR / ALC / SWR / Id / Vd / COMP. Memory channels with one-tap recall; every UI preference persists in cookies.
Optional networked ATR1000 antenna tuner: learned LC relay values follow every frequency change, and a server-side tune assist runs the full carrier-measure-keep-or-rollback sequence for you.
Touch-and-hold TX with instant release on touch-end. Fire-and-forget TX0 with 500ms TX-status poll + browser watchdog. Server-side forced RX when the last client β or the TX-audio owner β disconnects.
Optimised for iPhone Safari: safe-area adaptation, PWA manifest with Service Worker offline caching, Wake Lock, fullscreen toggle, and a native SwiftUI companion app.
Windows 11/12 x64 β embedded Python 3.12 runtime, no manual Python install. Start Menu launcher with per-user config in %LOCALAPPDATA%.
MRRC-FT710-Setup.exe β v1.8.0 Stable
35.2 MB Β· x64
SHA-256: 36a48a5f3f325d112937751bddcdebc581039d0484a40c95c1b00fd4bcc170ea
v1.8.0 Stable keeps browser/Opus audio at 48 kHz and always converts each 960-sample TX frame to 882 samples at the FT-710's fixed 44.1 kHz device boundary, including after PortAudio reinitialization. TX-session logs now expose queue drops, and same-session reconnects safely replace stale audio ownership. Windows build, 439 tests, install/start/uninstall, and bundled-file checks passed; physical RF monitoring remains an operator-side acceptance check.
Without the FTDI DLLs the app falls back to the S-meter synthetic spectrum β CAT control and audio are unaffected. macOS / Linux / Raspberry Pi: run from source (see Quick Start below).
Windows users take the installer track; macOS / Linux / Raspberry Pi run from source. Both end at the same browser UI.
Silicon Labs CP210x VCP driver for the FT-710 Enhanced COM Port. FTDI D2XX only if you want FT4222 true spectrum.
Device Manager β Ports (COM & LPT) β Enhanced COM Port
MRRC-FT710-Setup.exe β v1.8.0, 35.2 MB, x64. Start Menu + optional desktop shortcut.
SHA-256 36a48a5f3f325d112937751bddcdebc581039d0484a40c95c1b00fd4bcc170ea
Start Menu β Edit Configuration β set the Enhanced COM Port and a strong web password.
%LOCALAPPDATA%\MRRC-FT710\ft710.env
Start Menu β MRRC FT-710 β the launcher starts the server and opens the browser automatically.
http://127.0.0.1:8888 β login β full control
Get the latest code from GitHub
git clone https://github.com/cheenle/mrrc_ft710.git
Python 3.12+ with FastAPI, Uvicorn, PySerial, PyAudio, NumPy
cd mrrc_ft710 && pip install -r requirements.txt
Set the serial port and launch β auto-detects FT-710 USB devices
FT710_SERIAL_PORT=/dev/cu.usbserial-XXXX python server.py
Any device on your network β phone, tablet, desktop. Default password: ft710
https://server-ip:8888 β login β full control
For real FT4222 SPI spectrum data, install libft4222 + libftd2xx from the wfview app bundle or FTDI website. CAT control and audio work without any FTDI libraries.
4 WebSocket connections, zero external middleware, built entirely on Python async frameworks.
SwiftUI companion app (iOS 17+) β same 4-channel WebSocket protocol as the browser, tuned for one-handed mobile operation.
Frequency (direct entry / step / band jump), VFO A/B, mode, filter width, Preamp/ATT, AGC, NB/NR/ANotch, RF power, mic gain, squelch β all from the iPhone.
850-bin real-time waterfall with FFT curve, colormap matched to the web UI. S-meter plus TX meters (PWR / SWR / ALC / COMP) and memory channel list.
RX: Opus 48kHz decode and playback through the device speaker. TX: mic capture at 48kHz in 20 ms PCM frames β hold PTT to talk.
Early access β build from source
Requires a physical iPhone (simulator unsupported β bundled libopus is arm64-device-only), iOS 17+, Xcode 15 + XcodeGen, and a TLS-enabled server. The P0 PTT-safety issues from the 2026-07-20 audit are resolved β TX uplink ownership follows the keying client.
IBM TeamSD methodology Β· 15 chapters Β· V2.9 Β· Architecture decisions, component model, PTT safety, and full version history.
Scan the QR code with WeChat to join the MRRC-HAM group.
QR code valid until Aug 29, 2026. Will be updated when refreshed.