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btlescan

★ 56 Open GitHub ↗

BTLE/Bluetooth Scanner

// repository documentation

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# btlescan

A cross-platform terminal UI for scanning Bluetooth Low Energy devices, inspecting GATT services and characteristics, and reading/writing characteristic values in real time.

![demo](https://raw.githubusercontent.com/ztroop/btlescan/main/assets/demo.png)

## Features

- **Device Discovery** — Continuous scanning with live updates of address/UUID, name, TX power, and RSSI.
- **GATT Inspection** — Connect to a device, discover services, and browse characteristics with their properties.
- **Read / Write** — Read characteristic values or write data in hex or text format.
- **Notifications** — Subscribe to characteristic notifications with a timestamped message log.
- **Server Mode** _(Linux only, opt-in)_ — Run a GATT server: set characteristic values for read responses, send notifications to subscribed clients.
- **CSV Export** — Export the device list to a CSV file.

## Keyboard Controls

### Client Mode

| Key | Action |
|-----|--------|
| `q` | Quit |
| `Tab` | Cycle focus between panels |
| `↑/↓` or `j/k` | Navigate lists / scroll log |
| `Enter` | Connect to selected device |
| `d` | Disconnect |
| `r` | Read selected characteristic |
| `w` / `i` | Write — enter editing mode |
| `n` | Toggle notification subscription |
| `t` | Toggle hex / text input format |
| `s` | Toggle scan pause/resume |
| `e` | Export devices to CSV |
| `m` | Switch to server mode |
| `Esc` | Cancel editing |

### Server Mode

| Key | Action |
|-----|--------|
| `a` | Start advertising |
| `x` | Stop advertising |
| `w` | Set characteristic value (returned on reads) |
| `n` | Send notification to subscribed clients |
| `t` | Toggle hex / text input format |
| `↑/↓` or `j/k` | Navigate fields / scroll log |
| `m` | Switch to client mode |
| `Esc` | Cancel editing |

## Installation

```sh
cargo install btlescan
```

To include the GATT server feature (Linux only):

```sh
cargo install btlescan --features server
```

## Alternatives

If you're looking to manage or pair Bluetooth devices, check out [bluetui](https://github.com/pythops/bluetui)!

btlescan

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