RT-4D CPS

A codeplug programming software for the Radtel RT-4D, with full support for DualTachyon's REFW custom firmware.

Caution

This software is optimized to work with DT's REFW beta 42 and up. Versions are released to match a refw beta release.

Download

Prebuilt binaries for Windows, macOS, and Linux are available on the Releases page.

The app checks for updates automatically — you'll be notified when a new version is available.

Screenshots

Features

Radio Communication

• Read the full codeplug from your radio over USB
• Write changes back — select exactly which regions to flash (channels, contacts, zones, etc.)
• Backup the entire SPI flash as a binary dump
• Auto-detection of serial port and firmware version

Channel Management

• Edit up to 1024 channels — both analog (FM/AM) and digital (DMR)
• Set frequencies, power level, CTCSS/DCS tones, bandwidth, time slot, color code, and more
• Drag-and-drop reordering, copy/paste, and multi-select delete
• Search and filter channels by name
• Automatic repeater offset calculation (configurable VHF/UHF shifts)

Contacts & Groups

• Manage DMR contacts (Private, Group, All Call)
• Create and assign RX group lists with drag-and-drop

Zones

• Organize channels into zones (up to 250 channels per zone)

Address Book

• Import large DMR user databases (100k+ contacts) from CSV
• Search by DMR ID, callsign, or name
• Write the address book directly to your radio

Encryption & DTMF

• Manage up to 32 encryption keys (ARC4, AES-128, AES-256)
• Configure DTMF sequences and remote control codes

Messages

• View and edit preset DMR SMS messages

FM Radio Presets

• Configure FM broadcast presets (76–108 MHz)

Radio Settings

• Radio ID and callsign
• Display, audio, power save, scan, and startup options
• REFW-specific settings: scan speed, spectrum threshold, callsign lookup, and more

Import / Export

• CSV import and export for channels (with replace or append mode)
• CSV import and export for DMR address books
• Open and save .4rdmf codeplug files

Interface

• Dark, light, and system themes
• Keyboard shortcuts throughout
• Status bar, tooltips, and unsaved-changes warnings

Running from Source

Requires Python 3.9+.

pip install -r requirements.txt
python3 rt4d_gui.py

Command-Line Interface

A CLI is also available for scripting and automation:

# List channels
python3 rt4d_editor.py --file your.4rdmf --list-channels

# Export channels to CSV
python3 rt4d_editor.py --file your.4rdmf --export-csv channels.csv

# Backup radio over serial
python3 rt4d_editor.py --port COM3 --backup backup.bin

# Flash specific regions
python3 rt4d_editor.py --port COM3 --flash your.4rdmf --flash-regions channels contacts