iOS Configure Beacons with CoreBluetooth Showing names of all Bluetooth Low Energy (BLE)
Example
- For this example I have a controlled room with a single BLE device enable.
- Your class should extend CBCentralManagerDelegate.
- Implement the method: centralManagerDidUpdateState(_ central: CBCentralManager).
- Use global queue to not freeze the screen while searching for a device.
- Instantiate CBCentralManager and wait for callback centralManagerDidUpdateState response.
class BLEController: CBCentralManagerDelegate{
var cb_manager: CBCentralManager!
var bles : [CBPeripheral] = []
override func viewDidLoad() {
super.viewDidLoad()
cb_manager = CBCentralManager(delegate: self, queue: DispatchQueue.global())
}
func centralManagerDidUpdateState(_ central: CBCentralManager) {
print("UPDATE STATE - \(central)")
}
}
Callback to centralManagerDidUpdateState indicates that CoreBluetooth is ready, so you can search for BLE now. Update centralManagerDidUpdateState code to search for all BLE device when it is ready.
func centralManagerDidUpdateState(_ central: CBCentralManager) {
print("UPDATE STATE - \(central)")
SearchBLE()
}
func SearchBLE(){
cb_manager.scanForPeripherals(withServices: nil, options: nil)
StopSearchBLE()
}
func StopSearchBLE() {
let when = DispatchTime.now() + 5 // change 5 to desired number of seconds
DispatchQueue.main.asyncAfter(deadline: when) {
self.cb_manager.stopScan()
}
}
- SearchBLE() search for BLE devices and stop searching after 5s
- cb_manager.scanForPeripherals(withServices: nil, options: nil) looks for every BLE in range with you.
- StopSearchBLE() will stop the search after 5s.
- Each BLE found will callback func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber)
func centralManager(_ central: CBCentralManager, didDiscover peripheral:
CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
guard let name = peripheral.name else {
return
}
print(name)
bles.append(peripheral)
}
