XCOM.DEV

Tool · Web Bluetooth · no install

BLE Terminal

Talk to your firmware over Bluetooth Low Energy.

A browser-based serial monitor for BLE. Connect to the Nordic UART Service (NUS), Microchip Transparent UART, TI Serial Port Service or Silicon Labs SPP-over-BLE, then view and send data — ASCII or hex. Everything runs locally in your browser; no data leaves the tab.

disconnected
console

Why in the browser?

The Web Bluetooth API exposes GATT directly to the page. No driver install, no serial cable — useful when the target MCU only has a BLE radio. This is the same idea as NinjaTerm's BLE connection type, rebuilt as a zero-install web tool.

Services auto-detected

NUS 6e400001…, Microchip 49535343…, TI SPS f000c0e0… and Silicon Labs 4880c12c…. The RX (write) and TX (notify) characteristics are resolved automatically per preset.

Protocols & limits

BLE v4 caps a notification at 20 bytes; v5 raises this, though some stacks still impose 20. Longer writes are chunked to the negotiated ATT MTU.

Accessibility

Keyboard-first: Tab through controls, Enter sends, visible focus rings, and reduced-motion is respected via the XCOM token layer. The console is an ARIA live region.