core-bluetooth-adapter-scanner.swift

import Foundation
import CoreBluetooth

/* 
This Swift script scans for Bluetooth devices and prints information about the active Bluetooth adapter.
It uses the CoreBluetooth framework to manage Bluetooth operations and the system_profiler command to fetch adapter details.

To compile & run: 
```bash
swiftc -framework CoreBluetooth main.swift -o BLEScanner
./BLEScanner
```

Tested with Swift Version 6.1.2 (swiftlang-6.1.2.1.2 clang-1700.0.13.5) & macOS 15.5 (24F74) on Apple M2 Pro

Example output (third party Bluetooth device):
```txt
./BLEScanner
📡 Fetching active Bluetooth adapter info...

Bluetooth:

      Bluetooth Controller:
          Address: 00:25:BF:71:62:24
          State: On
          Chipset: THIRD_PARTY_DONGLE
          Discoverable: Off
          Firmware Version: v13083 c13083
          Product ID: 0x4A11
          Supported services: 0x392039 < HFP AVRCP A2DP HID Braille LEA AACP GATT SerialPort >
          Transport: PCIe
          Vendor ID: 0x004C (Apple)


Bluetooth is powered on. Starting scan.
``` 


example output (Apple Bluetooth device):
```txt
./BLEScanner
📡 Fetching active Bluetooth adapter info...

Bluetooth:

      Bluetooth Controller:
          Address: 5C:E9:1E:99:EB:EF
          State: On
          Chipset: BCM_4388
          Discoverable: Off
          Firmware Version: 22.5.542.2777
          Product ID: 0x4A11
          Supported services: 0x392039 < HFP AVRCP A2DP HID Braille LEA AACP GATT SerialPort >
          Transport: PCIe
          Vendor ID: 0x004C (Apple)
      Not Connected:
          8BitDo Lite gamepad:
              Address: E4:17:D8:CF:9B:15
              Vendor ID: 0x045E
              Product ID: 0x02E0
              Firmware Version: 9.0.3
              Minor Type: Gamepad
          MX Anywhere 3S:
              Address: D8:74:CD:2F:11:40
              Minor Type: Mouse
          MX Anywhere 3S:
              Address: D6:2F:DE:72:0F:12
              Minor Type: Mouse
          MX Keys Mini:
              Address: D1:5A:18:16:6B:FB
              Minor Type: Keyboard
          MX KEYS S MAC:
              Address: DF:CC:F5:0A:90:3A
              Minor Type: Keyboard
          Pro Controller:
              Address: E4:17:D8:78:0C:62
              Vendor ID: 0x057E
              Product ID: 0x2009
              Firmware Version: 0.0.1
              Minor Type: Gamepad


Bluetooth is powered on. Starting scan.
Discovered: IOTWF790 - RSSI: -82
Discovered: Unknown - RSSI: -72
Discovered: M720 Triathlon - RSSI: -47
Discovered: M720 Triathlon - RSSI: -47
Discovered: Unknown - RSSI: -69
Discovered: Unknown - RSSI: -71
Discovered: Unknown - RSSI: -71
Discovered: Unknown - RSSI: -65
Discovered: Alex's Whoop - RSSI: -87
Discovered: wee-adv - RSSI: -46
Discovered: wee-adv - RSSI: -46
````
*/

func printAdapterInfo() {
    print("📡 Fetching active Bluetooth adapter info...\n")
    let task = Process()
    task.executableURL = URL(fileURLWithPath: "/usr/sbin/system_profiler")
    task.arguments = ["SPBluetoothDataType"]

    let pipe = Pipe()
    task.standardOutput = pipe
    task.standardError = pipe

    do {
        try task.run()
        let data = pipe.fileHandleForReading.readDataToEndOfFile()
        if let output = String(data: data, encoding: .utf8) {
            print(output)
        }
    } catch {
        print("Failed to fetch adapter info: \(error)")
    }
}

class Scanner: NSObject, CBCentralManagerDelegate {
    var centralManager: CBCentralManager!

    override init() {
        super.init()
        centralManager = CBCentralManager(delegate: self, queue: nil)
    }

    func centralManagerDidUpdateState(_ central: CBCentralManager) {
        if central.state == .poweredOn {
            print("Bluetooth is powered on. Starting scan.")
            centralManager.scanForPeripherals(withServices: nil, options: nil)
        } else {
            print("Bluetooth not available: \(central.state.rawValue)")
        }
    }

    func centralManager(_ central: CBCentralManager,
                        didDiscover peripheral: CBPeripheral,
                        advertisementData: [String : Any],
                        rssi RSSI: NSNumber) {
        print("Discovered: \(peripheral.name ?? "Unknown") - RSSI: \(RSSI)")
    }
}

// Keep the program alive
printAdapterInfo()
let scanner = Scanner()
RunLoop.main.run()