Good afternoon guys, I want to create an app that's detects common bluetooth based credit card skimmers predominantly found in gas pumps. The app scans for available bluetooth connections looking for a device with title HC-05. If found, the app will attempt to connect using the default password of 1234. Once connected, the letter 'P' will be sent. If a response of 'M' then there is a very high likelihood there is a skimmer in the bluetooth range of your phone (5 to 15 feet).
I can show you the code I already have:
class ScanViewController: UIViewController, CBPeripheralDelegate, CBCentralManagerDelegate {
// Properties Back-End
private var centralManager: CBCentralManager!
private var peripherals: [CBPeripheral] = []
private var peripheral: CBPeripheral!
override func viewDidLoad() {
super.viewDidLoad()
view.backgroundColor = .systemGroupedBackground
centralManager = CBCentralManager(delegate: self, queue: nil)
}
//MARK: - Back-End
// If we're powered on, start scanning
func centralManagerDidUpdateState(_ central: CBCentralManager) {
print("Central state update")
if central.state != .poweredOn {
print("Central is not powered on")
} else {
print("Central scanning for", ParticlePeripheral.skimmerDeviceUUID);
centralManager.scanForPeripherals(withServices: [ParticlePeripheral.skimmerDeviceUUID],
options: [CBCentralManagerScanOptionAllowDuplicatesKey : true])
}
}
// Handles the result of the scan
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
// We've found it so stop scan
self.centralManager.stopScan()
print("Stopped to scan")
// Copy the peripheral instance
self.peripheral = peripheral
self.peripheral.delegate = self
// Connect!
self.centralManager.connect(self.peripheral, options: nil)
}
// The handler if we do connect succesfully
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
if peripheral == self.peripheral {
print("Connected to Skimmer Scammer")
peripheral.discoverServices([ParticlePeripheral.skimmerDeviceUUID])
}
}
// Handles discovery event
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
if let services = peripheral.services {
for service in services {
if service.uuid == ParticlePeripheral.skimmerDeviceUUID {
print("Skimmer Scanner service found")
//Now kick off discovery of characteristics
peripheral.discoverCharacteristics([...], for: service)
return
}
}
}
}
class ParticlePeripheral: NSObject {
// I think thats the uuid for HC-05
public static let skimmerDeviceUUID = CBUUID.init(string: "00001101-0000-1000-8000-00805F9B34FB")
}
I googled around for hours but I wasn't able to find a solution and I have never worked with Bluetooth connections before, that makes it really difficult but I tried. My questions:
- is the code I already have valid?
- How to can I connect via pin code? "1234"
I would be so helpful if someone here has some advices for me, thanks in advance!
