diff --git a/Improv-iOS-Demo/Device/DeviceView.swift b/Improv-iOS-Demo/Device/DeviceView.swift
index 97ca962..3283173 100644
--- a/Improv-iOS-Demo/Device/DeviceView.swift
+++ b/Improv-iOS-Demo/Device/DeviceView.swift
@@ -39,7 +39,9 @@ struct DeviceView<Manager>: View where Manager: ImprovManagerProtocol {
             }
             Section {
                 Button(action: {
-                    improvManager.identifyDevice()
+                    if let error = improvManager.identifyDevice() {
+                        print("ERROR while identify command: \(error)")
+                    }
                 }, label: {
                     Text("Identify")
                 })
@@ -50,7 +52,9 @@ struct DeviceView<Manager>: View where Manager: ImprovManagerProtocol {
                 TextField("SSID", text: $ssid)
                 TextField("Password", text: $password)
                 Button(action: {
-                    improvManager.sendWifi(ssid: ssid, password: password)
+                    if let error = improvManager.sendWifi(ssid: ssid, password: password) {
+                        print("ERROR while sendWifi command: \(error)")
+                    }
                 }, label: {
                     Text("Connect to Wifi")
                 })
diff --git a/Improv-iOS/BluetoothManager.swift b/Improv-iOS/BluetoothManager.swift
index 33d22ac..1acc6fb 100644
--- a/Improv-iOS/BluetoothManager.swift
+++ b/Improv-iOS/BluetoothManager.swift
@@ -27,8 +27,13 @@ protocol BluetoothManagerProtocol {
     func stopScan()
     func connectToDevice(_ peripheral: CBPeripheral)
     func disconnectFromDevice(_ peripheral: CBPeripheral)
-    func identifyDevice()
-    func sendWifi(ssid: String, password: String)
+    func identifyDevice() -> BluetoothManagerError?
+    func sendWifi(ssid: String, password: String) -> BluetoothManagerError?
+}
+
+public enum BluetoothManagerError: Error {
+    case deviceDisconnected
+    case serviceNotAvailable
 }
 
 final class BluetoothManager: NSObject, BluetoothManagerProtocol {
@@ -69,24 +74,30 @@ final class BluetoothManager: NSObject, BluetoothManagerProtocol {
         centralManager.cancelPeripheralConnection(peripheral)
     }
 
-    func identifyDevice() {
+    func identifyDevice() -> BluetoothManagerError? {
         guard let gatt = bluetoothGatt else {
-            fatalError("Not Connected to a Device!")
+            return .deviceDisconnected
         }
         if let rpc = gatt.services?.first(where: { $0.uuid == BluetoothUUIDs.serviceProvision })?.characteristics?.first(where: { $0.uuid == BluetoothUUIDs.charRpc }) {
             sendRpc(rpc, command: .identify, data: [])
+            return nil
+        } else {
+            return .serviceNotAvailable
         }
     }
 
-    func sendWifi(ssid: String, password: String) {
+    func sendWifi(ssid: String, password: String) -> BluetoothManagerError? {
         guard let gatt = bluetoothGatt else {
-            fatalError("Not Connected to a Device!")
+            return .deviceDisconnected
         }
         if let rpc = gatt.services?.first(where: { $0.uuid == BluetoothUUIDs.serviceProvision })?.characteristics?.first(where: { $0.uuid == BluetoothUUIDs.charRpc }) {
             let encodedSsid = Array(ssid.utf8)
             let encodedPassword = Array(password.utf8)
             let data = [UInt8(encodedSsid.count)] + encodedSsid + [UInt8(encodedPassword.count)] + encodedPassword
             sendRpc(rpc, command: .sendWifi, data: data)
+            return nil
+        } else {
+            return .serviceNotAvailable
         }
     }
 
diff --git a/Improv-iOS/ImprovManager.swift b/Improv-iOS/ImprovManager.swift
index a91c335..186e919 100644
--- a/Improv-iOS/ImprovManager.swift
+++ b/Improv-iOS/ImprovManager.swift
@@ -17,8 +17,8 @@ public protocol ImprovManagerProtocol: ObservableObject {
     func stopScan()
     func connectToDevice(_ peripheral: CBPeripheral)
     func disconnectFromDevice(_ peripheral: CBPeripheral)
-    func identifyDevice()
-    func sendWifi(ssid: String, password: String)
+    func identifyDevice() -> BluetoothManagerError?
+    func sendWifi(ssid: String, password: String) -> BluetoothManagerError?
     func reset()
 }
 
@@ -99,11 +99,11 @@ public final class ImprovManager: NSObject, ImprovManagerProtocol {
         bluetoothManager.disconnectFromDevice(peripheral)
     }
 
-    public func identifyDevice() {
+    public func identifyDevice() -> BluetoothManagerError? {
         bluetoothManager.identifyDevice()
     }
 
-    public func sendWifi(ssid: String, password: String) {
+    public func sendWifi(ssid: String, password: String) -> BluetoothManagerError? {
         bluetoothManager.sendWifi(ssid: ssid, password: password)
     }
 
diff --git a/Improv-iOSTests/Mocks/MockBluetoothManager.swift b/Improv-iOSTests/Mocks/MockBluetoothManager.swift
index cbd48c7..861df73 100644
--- a/Improv-iOSTests/Mocks/MockBluetoothManager.swift
+++ b/Improv-iOSTests/Mocks/MockBluetoothManager.swift
@@ -10,6 +10,7 @@ import CoreBluetooth
 @testable import Improv_iOS
 
 class MockBluetoothManager: BluetoothManagerProtocol {
+    
     weak var delegate: BluetoothManagerDelegate?
     var state: CBManagerState = .unknown
 
@@ -18,6 +19,7 @@ class MockBluetoothManager: BluetoothManagerProtocol {
     var connectToDeviceCalled = false
     var identifyDeviceCalled = false
     var sendWifiCalled = false
+    var disconnectFromDeviceCalled = false
 
     var lastPeripheral: CBPeripheral?
     var lastSSID: String?
@@ -36,13 +38,19 @@ class MockBluetoothManager: BluetoothManagerProtocol {
         lastPeripheral = peripheral
     }
 
-    func identifyDevice() {
+    func disconnectFromDevice(_ peripheral: CBPeripheral) {
+        disconnectFromDeviceCalled = true
+    }
+
+    func identifyDevice() -> Improv_iOS.BluetoothManagerError? {
         identifyDeviceCalled = true
+        return nil
     }
 
-    func sendWifi(ssid: String, password: String) {
+    func sendWifi(ssid: String, password: String) -> Improv_iOS.BluetoothManagerError? {
         sendWifiCalled = true
         lastSSID = ssid
         lastPassword = password
+        return nil
     }
 }