Add Read from Characteristic at Peripheral

RippleChat.xcodeproj/project.pbxproj

@@ -497,7 +497,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_ASSET_PATHS = "\"RippleChat/Preview Content\"";
-				DEVELOPMENT_TEAM = B5S58UWR64;
+				DEVELOPMENT_TEAM = GN2B48NJ47;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_NSBluetoothAlwaysUsageDescription = "Allow for bluetooth use";
@@ -512,7 +512,7 @@
 					"@executable_path/Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = unibas.inetsec.RippleChat;
+				PRODUCT_BUNDLE_IDENTIFIER = unibas.inetsec.RippleChat1;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
@@ -528,7 +528,7 @@
 				CODE_SIGN_STYLE = Automatic;
 				CURRENT_PROJECT_VERSION = 1;
 				DEVELOPMENT_ASSET_PATHS = "\"RippleChat/Preview Content\"";
-				DEVELOPMENT_TEAM = B5S58UWR64;
+				DEVELOPMENT_TEAM = GN2B48NJ47;
 				ENABLE_PREVIEWS = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_KEY_NSBluetoothAlwaysUsageDescription = "Allow for bluetooth use";
@@ -543,7 +543,7 @@
 					"@executable_path/Frameworks",
 				);
 				MARKETING_VERSION = 1.0;
-				PRODUCT_BUNDLE_IDENTIFIER = unibas.inetsec.RippleChat;
+				PRODUCT_BUNDLE_IDENTIFIER = unibas.inetsec.RippleChat1;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;

RippleChat/BTPeripheral.swift

@@ -51,4 +51,35 @@ extension BluetoothPeripheral: CBPeripheralManagerDelegate {
         print("Started Advertising")
        
     }
+    
+    func peripheralManager(_ peripheral: CBPeripheralManager, didReceiveWrite requests: [CBATTRequest]) {
+        for request in requests {
+            if let value = request.value {
+                // Handle the received data
+                let receivedData = Data(value)
+                
+                // Decode the received JSON string into your data structure
+                let decoder = JSONDecoder()
+                do {
+                    let receivedObject = try decoder.decode(String.self, from: receivedData)
+                    // Use the received object to update your app state as needed
+                    print(receivedObject)
+                } catch {
+                    print("Failed to decode JSON: \(error)")
+                }
+                
+                // If you want to write back to the central
+//                if let central = request.central {
+//                    let dataToWrite = // some data you want to send back
+//                    let writeType: CBCharacteristicWriteType = // choose .withResponse or .withoutResponse
+//                    central.writeValue(dataToWrite, for: request.characteristic, type: writeType)
+//                }
+                
+            }
+            
+            // Respond to the write request
+            peripheral.respond(to: request, withResult: .success)
+        }
+    }
+
 }

RippleChat/BluetoothController.swift

@@ -13,6 +13,8 @@ class BluetoothController: NSObject, ObservableObject {
     private var peripherals: [CBPeripheral] = []
     @Published var peripheralNames: [String] = []
     
+    var writeCharacteristics: [CBCharacteristic] = []
+    
     let BLE_SERVICE_UUID = CBUUID(string: "6e400001-7646-4b5b-9a50-71becce51558")
     let BLE_CHARACTERISTIC_UUID_RX = CBUUID(string: "6e400002-7646-4b5b-9a50-71becce51558")
     
@@ -37,9 +39,33 @@ extension BluetoothController: CBCentralManagerDelegate {
         }
     }
     
-    func sendWantVector(data: Data) {
+    
+    func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
+        guard let characteristics = service.characteristics else {
+            print("No characteristics found for service \(service.uuid)")
+            return
+        }
+
+        for characteristic in characteristics {
+            if characteristic.properties.contains(.write) || characteristic.properties.contains(.writeWithoutResponse) {
+                // This characteristic supports writing
+                writeCharacteristics.append(characteristic)
+            }
+        }
+    }
+
+    func writeToCharacteristics(message: String) {
+        guard let messageData = message.data(using: .utf8) else {
+            print("Could not convert message to data.")
+            return
+        }
+
+        // Go through 
+        for characteristic in writeCharacteristics {
+            // Go through connected peripherals and write to their characteristic
             for peripheral in peripherals {
-            //peripheral.writeValue(data, for: peripheral., type: .withoutResponse)
+                peripheral.writeValue(messageData, for: characteristic, type: .withResponse)
+            }
         }
     }
 }

RippleChat/Views/PeeringView.swift

@@ -23,7 +23,7 @@ struct PeeringView: View {
                 do {
                     let WANT_msg = WantMessage(friends: dataStore.friends)
                     let encoded_msg = try JSONEncoder().encode(WANT_msg)
-                    
+                    btController.writeToCharacteristics(message: String(data: encoded_msg, encoding: .utf8)!)
                 } catch {
                     fatalError(error.localizedDescription)
                 }