📻 BC75XLT Web Programmer

🇧🇷 Versão em português · Portuguese version available

A static web page, published on GitHub Pages, that programs the Uniden BC75XLT / UBC75XLT scanner radio directly from the browser using the Web Serial API — no software to install and no data sent to servers.

🔗 Live app: https://bcp.romildo.net

Features

• 🔌 Connect the radio via the serial port (Web Serial API) at 57600 bps.
• 📥 Read from radio: loads all settings + the 300 channels (10 banks × 30).
• 📤 Write to radio: sends settings and channels (with option to clear memory first).
• 📂 Import file: reads .bc75xlt_ss files from Uniden's original software.
• 💾 Save file: exports a .bc75xlt_ss compatible with the original software.
• ⚙️ Settings panel: Band Plan, Priority, Key Lock, Volume, Squelch, general/custom search, Close Call, banks (SCG), Service Search and global lockouts.
• 🗂️ Tabs with editable frequency lists for each bank.
• 📋 Paste frequencies from a spreadsheet (Excel column) directly into a bank.

How to use

1. Connect the radio to the computer via USB cable (driver Silicon Labs CP210x installed).
2. Open https://bcp.romildo.net in Chrome or Edge.
3. Click Connect radio and pick the serial port.
4. Read from radio or Import file to load the configuration.
5. Edit and click Write to radio.

The Web Serial API requires HTTPS, which GitHub Pages provides automatically. Use Chrome or Edge on desktop.

Technical notes

• Communication happens directly in the browser via the Web Serial API — no data leaves your computer. Protocol based on BC75XLT_Protocol.pdf (Uniden) and on the mateusza/bearcatctl project.
• Protocol: ASCII command line terminated with \r, response terminated with \r, 57600 bps 8N1 (documented in BC75XLT_Protocol.pdf).
• The frequency field in the radio (CIN/CSP) uses 100 Hz units (MHz × 10000); the .bc75xlt_ss file uses Hz.
• The .bc75xlt_ss file is text with TAB-separated fields and CRLF line endings, faithfully reproduced on export.
• Global lockouts are read from the radio (read-only for now).
• References: mateusza/bearcatctl and skriebel/bc75xlt.

⚠️ Disclaimer: program your radio responsibly and within your local amateur radio / band legislation.