Setup BLE Peripheral

RippleChat/BTPeripheral.swift

@@ -0,0 +1,68 @@
+//
+//  BTPeripheral.swift
+//  RippleChat
+//
+//  Created by Severin Memmishofer on 11.07.23.
+//
+
+import SwiftUI
+import CoreBluetooth
+
+class BluetoothPeripheral: NSObject, ObservableObject {
+    
+    private var peripheralManager: CBPeripheralManager?
+    
+    let BLE_SERVICE_UUID = CBUUID(string: "6e400001-7646-4b5b-9a50-71becce51558")
+    let BLE_CHARACTERISTIC_UUID_RX = CBUUID(string: "6e400002-7646-4b5b-9a50-71becce51558")
+    
+    override init() {
+        super.init()
+        self.peripheralManager = CBPeripheralManager(delegate: self, queue: .main)
+    }
+}
+
+extension BluetoothPeripheral: CBPeripheralManagerDelegate {
+    func peripheralManagerDidUpdateState(_ peripheral: CBPeripheralManager) {
+        switch peripheral.state {
+        case .unknown:
+            print("Bluetooth Device is UNKNOWN")
+        case .unsupported:
+            print("Bluetooth Device is UNSUPPORTED")
+        case .unauthorized:
+            print("Bluetooth Device is UNAUTHORIZED")
+        case .resetting:
+            print("Bluetooth Device is RESETTING")
+        case .poweredOff:
+            print("Bluetooth Device is POWERED OFF")
+        case .poweredOn:
+            print("Bluetooth Device is POWERED ON")
+            addServices()
+        @unknown default:
+            fatalError()
+        }
+    }
+    
+    func addServices() {
+        
+        let value = Feed.sampleFeed
+        // let valueData = value(using: .utf8)
+        
+        // 1. Create instance of CBMutableCharcateristic
+//        let myCharacteristic1 = CBMutableCharacteristic(type: CBUUID(nsuuid: UUID()), properties: [.notify, .write, .read], value: nil, permissions: [.readable, .writeable])
+        let myCharacteristic = CBMutableCharacteristic(type: BLE_CHARACTERISTIC_UUID_RX, properties: [.read], value: nil, permissions: [.readable])
+       
+        // 2. Create instance of CBMutableService
+        let myService = CBMutableService(type: BLE_SERVICE_UUID, primary: true)
+        
+        // 3. Add characteristics to the service
+        myService.characteristics = [myCharacteristic]
+        
+        // 4. Add service to peripheralManager
+        peripheralManager!.add(myService)
+        
+        // 5. Start advertising
+        peripheralManager!.startAdvertising([CBAdvertisementDataLocalNameKey : "RippleChat", CBAdvertisementDataServiceUUIDsKey : BLE_SERVICE_UUID])
+        print("Started Advertising")
+       
+    }
+}

RippleChat/BluetoothController.swift

@@ -1,5 +1,5 @@
 //
-//  BluetoothViewModel.swift
+//  BluetoothController.swift
 //  RippleChat
 //
 //  Created by Severin Memmishofer on 09.07.23.
@@ -8,21 +8,24 @@
 import SwiftUI
 import CoreBluetooth
 
-class BluetoothViewModel: NSObject, ObservableObject {
+class BluetoothController: NSObject, ObservableObject {
     private var centralManager: CBCentralManager?
     private var peripherals: [CBPeripheral] = []
     @Published var peripheralNames: [String] = []
     
+    let BLE_SERVICE_UUID = CBUUID(string: "6e400001-7646-4b5b-9a50-71becce51558")
+    let BLE_CHARACTERISTIC_UUID_RX = CBUUID(string: "6e400002-7646-4b5b-9a50-71becce51558")
+    
     override init() {
         super.init()
         self.centralManager = CBCentralManager(delegate: self, queue: .main)
     }
 }
 
-extension BluetoothViewModel: CBCentralManagerDelegate {
+extension BluetoothController: CBCentralManagerDelegate {
     func centralManagerDidUpdateState(_ central: CBCentralManager) {
         if central.state == .poweredOn {
-            self.centralManager?.scanForPeripherals(withServices: nil)
+            self.centralManager?.scanForPeripherals(withServices: [BLE_SERVICE_UUID])
         }
     }
     

RippleChat/Views/PeeringView.swift

@@ -8,12 +8,13 @@
 import SwiftUI
 
 struct PeeringView: View {
-    @ObservedObject private var bluetoothViewModel = BluetoothViewModel()
+    @ObservedObject private var bluetoothController = BluetoothController()
+    @ObservedObject private var bluetoothPeripheral = BluetoothPeripheral()
     
     var body: some View {
         Text("Peering View")
         NavigationView {
-            List(bluetoothViewModel.peripheralNames, id: \.self) { peripheral in
+            List(bluetoothController.peripheralNames, id: \.self) { peripheral in
                 Text(peripheral)
             }
             .navigationTitle("Peripherals")