Add icon, set device time

TempTrack.xcodeproj/project.pbxproj

@@ -14,6 +14,10 @@
 		88404DDB2A2F4DCA00D30244 /* MeasurementDailyCount.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DDA2A2F4DCA00D30244 /* MeasurementDailyCount.swift */; };
 		88404DDD2A2F587400D30244 /* HistoryListRow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DDC2A2F587400D30244 /* HistoryListRow.swift */; };
 		88404DDF2A2F68E100D30244 /* TemperatureDayOverview.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DDE2A2F68E100D30244 /* TemperatureDayOverview.swift */; };
+		88404DE12A31CA6B00D30244 /* BluetoothResponseType.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DE02A31CA6B00D30244 /* BluetoothResponseType.swift */; };
+		88404DE32A31F20E00D30244 /* Int+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DE22A31F20E00D30244 /* Int+Extensions.swift */; };
+		88404DE52A31F23E00D30244 /* UInt16+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DE42A31F23E00D30244 /* UInt16+Extensions.swift */; };
+		88404DE92A31F7D500D30244 /* Data+Extensions.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88404DE82A31F7D500D30244 /* Data+Extensions.swift */; };
 		88CDE04F2A2508E900114294 /* TempTrackApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88CDE04E2A2508E900114294 /* TempTrackApp.swift */; };
 		88CDE0512A2508E900114294 /* ContentView.swift in Sources */ = {isa = PBXBuildFile; fileRef = 88CDE0502A2508E900114294 /* ContentView.swift */; };
 		88CDE0532A2508EA00114294 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 88CDE0522A2508EA00114294 /* Assets.xcassets */; };
@@ -45,6 +49,10 @@
 		88404DDA2A2F4DCA00D30244 /* MeasurementDailyCount.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MeasurementDailyCount.swift; sourceTree = "<group>"; };
 		88404DDC2A2F587400D30244 /* HistoryListRow.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = HistoryListRow.swift; sourceTree = "<group>"; };
 		88404DDE2A2F68E100D30244 /* TemperatureDayOverview.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TemperatureDayOverview.swift; sourceTree = "<group>"; };
+		88404DE02A31CA6B00D30244 /* BluetoothResponseType.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = BluetoothResponseType.swift; sourceTree = "<group>"; };
+		88404DE22A31F20E00D30244 /* Int+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Int+Extensions.swift"; sourceTree = "<group>"; };
+		88404DE42A31F23E00D30244 /* UInt16+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "UInt16+Extensions.swift"; sourceTree = "<group>"; };
+		88404DE82A31F7D500D30244 /* Data+Extensions.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "Data+Extensions.swift"; sourceTree = "<group>"; };
 		88CDE04B2A2508E900114294 /* TempTrack.app */ = {isa = PBXFileReference; explicitFileType = wrapper.application; includeInIndex = 0; path = TempTrack.app; sourceTree = BUILT_PRODUCTS_DIR; };
 		88CDE04E2A2508E900114294 /* TempTrackApp.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = TempTrackApp.swift; sourceTree = "<group>"; };
 		88CDE0502A2508E900114294 /* ContentView.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = ContentView.swift; sourceTree = "<group>"; };
@@ -119,7 +127,6 @@
 				88CDE06E2A28AE8D00114294 /* Temperature */,
 				88CDE0522A2508EA00114294 /* Assets.xcassets */,
 				88CDE0542A2508EA00114294 /* Preview Content */,
-				88CDE06C2A28A92000114294 /* DeviceInfo.swift */,
 			);
 			path = TempTrack;
 			sourceTree = "<group>";
@@ -149,9 +156,11 @@
 			children = (
 				88CDE0602A25108100114294 /* BluetoothClient.swift */,
 				88CDE07A2A28AF5100114294 /* BluetoothRequest.swift */,
+				88404DE02A31CA6B00D30244 /* BluetoothResponseType.swift */,
 				88CDE05C2A250F3C00114294 /* DeviceManager.swift */,
 				88CDE0732A28AEE500114294 /* DeviceManagerDelegate.swift */,
 				88CDE05E2A250F5200114294 /* DeviceState.swift */,
+				88CDE06C2A28A92000114294 /* DeviceInfo.swift */,
 			);
 			path = Bluetooth;
 			sourceTree = "<group>";
@@ -174,6 +183,9 @@
 				E253A9212A2B39B700EC6B28 /* Color+Extensions.swift */,
 				88404DD12A2F0D8F00D30244 /* Double+Extensions.swift */,
 				88404DD32A2F0DB100D30244 /* Date+Extensions.swift */,
+				88404DE22A31F20E00D30244 /* Int+Extensions.swift */,
+				88404DE42A31F23E00D30244 /* UInt16+Extensions.swift */,
+				88404DE82A31F7D500D30244 /* Data+Extensions.swift */,
 			);
 			path = Extensions;
 			sourceTree = "<group>";
@@ -265,14 +277,18 @@
 				88CDE05F2A250F5200114294 /* DeviceState.swift in Sources */,
 				88CDE0632A253AD900114294 /* TemperatureDataTransfer.swift in Sources */,
 				88CDE0702A28AEA300114294 /* TemperatureMeasurement.swift in Sources */,
+				88404DE12A31CA6B00D30244 /* BluetoothResponseType.swift in Sources */,
 				88CDE05D2A250F3C00114294 /* DeviceManager.swift in Sources */,
 				88404DDF2A2F68E100D30244 /* TemperatureDayOverview.swift in Sources */,
 				88CDE04F2A2508E900114294 /* TempTrackApp.swift in Sources */,
 				88CDE0722A28AEB900114294 /* TemperatureDataTransferDelegate.swift in Sources */,
 				88CDE0782A28AF2C00114294 /* TemperatureSensor.swift in Sources */,
 				88CDE0682A2698B400114294 /* TemperatureStorage.swift in Sources */,
+				88404DE92A31F7D500D30244 /* Data+Extensions.swift in Sources */,
+				88404DE52A31F23E00D30244 /* UInt16+Extensions.swift in Sources */,
 				88404DD42A2F0DB100D30244 /* Date+Extensions.swift in Sources */,
 				88CDE0762A28AF0900114294 /* TemperatureValue.swift in Sources */,
+				88404DE32A31F20E00D30244 /* Int+Extensions.swift in Sources */,
 				88CDE07B2A28AF5100114294 /* BluetoothRequest.swift in Sources */,
 				E253A9242A2B462500EC6B28 /* TemperatureHistoryChart.swift in Sources */,
 				88404DD22A2F0D8F00D30244 /* Double+Extensions.swift in Sources */,

TempTrack/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -1,6 +1,7 @@
 {
   "images" : [
     {
+      "filename" : "app.png",
       "idiom" : "universal",
       "platform" : "ios",
       "size" : "1024x1024"

TempTrack/Bluetooth/BluetoothClient.swift

@@ -1,21 +1,6 @@
 import Foundation
 import SwiftUI
 
-enum BluetoothResponseType: UInt8 {
-    
-    /// The response to the last request is provided
-    case success = 0
-    
-    /// Invalid command received
-    case invalidCommand = 1
-    
-    case responseTooLarge = 2
-    
-    case unknownCommand = 3
-    
-    case invalidNumberOfBytesToDelete = 4
-}
-
 final class BluetoothClient: ObservableObject {
     
     weak var delegate: TemperatureDataTransferDelegate?
@@ -24,8 +9,6 @@ final class BluetoothClient: ObservableObject {
     
     private let connection = DeviceManager()
     
-    private var didTransferData = false
-    
     init(deviceInfo: DeviceInfo? = nil) {
         connection.delegate = self
         self.deviceInfo = deviceInfo
@@ -43,7 +26,6 @@ final class BluetoothClient: ObservableObject {
                 startRegularUpdates()
             } else {
                 endRegularUpdates()
-                didTransferData = false
             }
         }
     }
@@ -51,15 +33,8 @@ final class BluetoothClient: ObservableObject {
     @Published
     private(set) var deviceInfo: DeviceInfo? {
         didSet {
-            guard !didTransferData, runningTransfer == nil else {
+            updateDeviceTimeIfNeeded()
-                return
+            collectRecordedData()
-            }
-            guard !openRequests.contains(where: { if case .getRecordingData = $0 { return true }; return false }) else {
-                return
-            }
-            guard collectRecordedData() else {
-                return
-            }
         }
     }
     
@@ -69,6 +44,8 @@ final class BluetoothClient: ObservableObject {
     
     private var runningTransfer: TemperatureDataTransfer?
     
+    // MARK: Regular updates
+    
     func updateDeviceInfo() {
         guard case .configured = deviceState else {
             return
@@ -105,6 +82,8 @@ final class BluetoothClient: ObservableObject {
         print("Ending updates")
     }
     
+    // MARK: Requests
+    
     private func performNextRequest() {
         guard runningRequest == nil else {
             return
@@ -124,15 +103,45 @@ final class BluetoothClient: ObservableObject {
     }
     
     func addRequest(_ request: BluetoothRequest) {
+        // TODO: Check if request already exists
         openRequests.append(request)
         performNextRequest()
     }
     
+    // MARK: Device time
     
+    private func updateDeviceTimeIfNeeded() {
+        guard let info = deviceInfo else {
+            return
+        }
+        guard !info.hasDeviceStartTimeSet else {
+            return
+        }
+        guard !openRequests.contains(where: { if case .setDeviceStartTime = $0 { return true }; return false }) else {
+            return
+        }
+        let time = info.deviceStartTime.seconds
+        addRequest(.setDeviceStartTime(deviceStartTimeSeconds: time))
+        print("Setting device start time to \(time) s (\(Date().seconds) current)")
+    }
+    
+    // MARK: Data transfer
+    
+    @discardableResult
     func collectRecordedData() -> Bool {
+        guard runningTransfer == nil else {
+            return false
+        }
+        guard !openRequests.contains(where: { if case .getRecordingData = $0 { return true }; return false }) else {
+            return false
+        }
         guard let info = deviceInfo else {
             return false
         }
+        guard info.numberOfStoredMeasurements > 0 else {
+            return false
+        }
+        
         let transfer = TemperatureDataTransfer(info: info)
         runningTransfer = transfer
         runningTransfer?.delegate = delegate
@@ -154,17 +163,11 @@ final class BluetoothClient: ObservableObject {
             return // TODO: Start new transfer?
         }
         let next = runningTransfer.nextRequest()
-        if case .clearRecordingBuffer = next {
-            runningTransfer.completeTransfer()
-            self.runningTransfer = nil
-            didTransferData = true
-            return
-        }
         addRequest(next)
     }
     
     private func decode(info: Data) {
-        guard let newInfo = DeviceInfo(info: info) else {
+        guard let newInfo = try? DeviceInfo(info: info) else {
             return
         }
         self.deviceInfo = newInfo
@@ -181,13 +184,13 @@ extension BluetoothClient: DeviceManagerDelegate {
     
     func deviceManager(didReceive data: Data) {
         defer {
-            self.runningRequest = nil
             performNextRequest()
         }
         guard let runningRequest else {
             print("No request active, but \(data) received")
             return
         }
+        self.runningRequest = nil
         
         guard data.count > 0 else {
             print("No response data for request \(runningRequest)")
@@ -198,14 +201,22 @@ extension BluetoothClient: DeviceManagerDelegate {
             print("Unknown response \(data[0]) for request \(runningRequest)")
             return
         }
-        guard type == .success else {
+        switch type {
-            print("Error response \(data[0]) for request \(runningRequest)")
+        case .success:
+            break
+        case .responseInProgress:
+            // Retry the request
+            addRequest(runningRequest)
+            return
+        default:
+            print("Unknown response \(data[0]) for request \(runningRequest)")
             // If clearing the recording buffer fails due to byte mismatch,
             // then requesting new info will resolve the mismatch, and the transfer will be resumed
             // If requesting bytes fails due to the response size,
             // then requesting new info will update the response size, and the transfer will be resumed
             addRequest(.getInfo)
             return
+        
         }
         let payload = data.dropFirst()
         
@@ -217,6 +228,9 @@ extension BluetoothClient: DeviceManagerDelegate {
         case .clearRecordingBuffer:
             runningTransfer?.completeTransfer()
             runningTransfer = nil
+        case .setDeviceStartTime:
+            print("Device time set")
+            break
         }
     }
     

TempTrack/Bluetooth/BluetoothRequest.swift

@@ -44,6 +44,11 @@ enum BluetoothRequest {
      */
     case clearRecordingBuffer(byteCount: Int)
     
+    /**
+     
+     */
+    case setDeviceStartTime(deviceStartTimeSeconds: Int)
+    
     var serialized: Data {
         let firstByte = Data([byte])
         switch self {
@@ -53,6 +58,8 @@ enum BluetoothRequest {
             return firstByte + count.twoByteData + offset.twoByteData
         case .clearRecordingBuffer(let byteCount):
             return firstByte + byteCount.twoByteData
+        case .setDeviceStartTime(let deviceStartTimeSeconds):
+            return firstByte + deviceStartTimeSeconds.fourByteData
         }
     }
     
@@ -61,26 +68,7 @@ enum BluetoothRequest {
         case .getInfo: return 0
         case .getRecordingData: return 1
         case .clearRecordingBuffer: return 2
+        case .setDeviceStartTime: return 3
         }
     }
 }
-
-private extension Int {
-    
-    var twoByteData: Data {
-        let value = UInt16(clamping: self)
-        return Data([value.low, value.high])
-    }
-}
-
-private extension UInt16 {
-    
-    var low: UInt8 {
-        UInt8(self & 0xFF)
-    }
-    
-    var high: UInt8 {
-        UInt8((self >> 8) & 0xFF)
-    }
-}
-

TempTrack/Bluetooth/BluetoothResponseType.swift

@@ -0,0 +1,19 @@
+import Foundation
+
+enum BluetoothResponseType: UInt8 {
+    
+    /// The response to the last request is provided
+    case success = 0
+    
+    /// Invalid command received
+    case invalidCommand = 1
+    
+    case responseTooLarge = 2
+    
+    case unknownCommand = 3
+    
+    case invalidNumberOfBytesToDelete = 4
+    
+    case responseInProgress = 5
+}
+

TempTrack/Bluetooth/DeviceInfo.swift

@@ -8,7 +8,10 @@ struct DeviceInfo {
     let numberOfRecordedBytes: Int
     
     /// The number of measurements already performed
-    let numberOfMeasurements: Int
+    let numberOfStoredMeasurements: Int
+    
+    /// The measurements since device start
+    let totalNumberOfMeasurements: Int
     
     /// The interval between measurements (in seconds)
     let measurementInterval: Int
@@ -44,73 +47,60 @@ struct DeviceInfo {
     var storageFillPercentage: Int {
         Int((storageFillRatio * 100).rounded())
     }
+    
+    var clockOffset: TimeInterval {
+        // Measurements are performed on device start (-1) and also count next measurement (+1)
+        let nextMeasurementTime = deviceStartTime.adding(seconds: (totalNumberOfMeasurements) * measurementInterval)
+        return nextMeasurement.timeIntervalSince(nextMeasurementTime)
+    }
 }
 
 extension DeviceInfo {
     
-    static var size = 42
+    init(info: Data) throws {
+        var data = info
         
-    init?(info: Data) {
+        let date = Date().nearestSecond
-        guard info.count == DeviceInfo.size else {
+        self.receivedDate = date
-            print("Invalid info size \(info.count)")
+        self.numberOfRecordedBytes = try data.decodeTwoByteInteger()
-            return nil
+        self.nextMeasurement = date.adding(seconds: try data.decodeTwoByteInteger())
-        }
+        self.measurementInterval = try data.decodeTwoByteInteger()
-        let data = Array(info)
+        self.numberOfStoredMeasurements = try data.decodeTwoByteInteger()
-        self.receivedDate = Date()
+        self.totalNumberOfMeasurements = try data.decodeFourByteInteger()
-        self.numberOfRecordedBytes = .init(high: data[1], low: data[0])
+        self.transferBlockSize = try data.decodeTwoByteInteger()
-        let secondsUntilNextMeasurement = UInt16(high: data[3], low: data[2])
+        self.storageSize = try data.decodeTwoByteInteger()
-        self.nextMeasurement = Date().addingTimeInterval(Double(secondsUntilNextMeasurement))
+        let secondsSincePowerOn = try data.decodeFourByteInteger()
-        self.measurementInterval = .init(high: data[5], low: data[4])
-        self.numberOfMeasurements = .init(high: data[7], low: data[6])
-        self.transferBlockSize = .init(high: data[9], low: data[8])
-        let secondsSincePowerOn = Int(uint32: data[13], data[12], data[11], data[10])
         self.numberOfSecondsRunning = secondsSincePowerOn
-        self.sensor0 = .init(address: Array(data[16..<24]), valueByte: data[14], secondsAgo: UInt16(high: data[33], low: data[32]))
+        let deviceStartTimeSeconds = try data.decodeFourByteInteger()
-        self.sensor1 = .init(address: Array(data[24..<32]), valueByte: data[15], secondsAgo: UInt16(high: data[35], low: data[34]))
+        self.sensor0 = try data.decodeSensor()
-        self.storageSize = .init(high: data[37], low: data[36])
+        self.sensor1 = try data.decodeSensor()
-        let deviceStartTimeSeconds = Int(uint32: data[41], data[40], data[39], data[38])
+        
         if deviceStartTimeSeconds != 0 {
             self.hasDeviceStartTimeSet = true
             self.deviceStartTime = Date(seconds: deviceStartTimeSeconds)
+            
         } else {
             self.hasDeviceStartTimeSet = false
-            self.deviceStartTime = Date(seconds: Date().seconds - secondsSincePowerOn) // Round to nearest second
+            self.deviceStartTime = Date(seconds: date.seconds - secondsSincePowerOn) // Round to nearest second
         }
     }
 }
 
-private extension UInt16 {
-    
-    init(high: UInt8, low: UInt8) {
-        self = UInt16(high) << 8 + UInt16(low)
-    }
-}
-
-private extension Int {
-    
-    init(uint32 byte0: UInt8, _ byte1: UInt8, _ byte2: UInt8, _ byte3: UInt8) {
-        self = (Int(byte0) << 24) | (Int(byte1) << 16) | (Int(byte2) << 8) | Int(byte3)
-    }
-    
-    init(high: UInt8, low: UInt8) {
-        self = Int(high) << 8 + Int(low)
-    }
-}
-
 extension DeviceInfo {
     
     static var mock: DeviceInfo {
         .init(
             receivedDate: Date(),
             numberOfRecordedBytes: 123,
-            numberOfMeasurements: 234,
+            numberOfStoredMeasurements: 234,
+            totalNumberOfMeasurements: 345,
             measurementInterval: 60,
             nextMeasurement: .now.addingTimeInterval(5),
             sensor0: .init(address: [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08], value: .value(21.0), date: .now.addingTimeInterval(-2)),
             sensor1: .init(address: [0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09], value: .value(19.0), date: .now.addingTimeInterval(-4)),
             numberOfSecondsRunning: 20,
-            deviceStartTime: .now.addingTimeInterval(-1000),
+            deviceStartTime: .now.addingTimeInterval(-20755),
-            hasDeviceStartTimeSet: false,
+            hasDeviceStartTimeSet: true,
             storageSize: 10000,
             transferBlockSize: 180)
     }

TempTrack/ContentView.swift

@@ -126,7 +126,8 @@ struct ContentView: View {
             }.padding()
         }
         .padding()
-        .bottomSheet(isPresented: $showDeviceInfo, height: 600)  {
+        .sheet(isPresented: $showDeviceInfo)  {
+        //.bottomSheet(isPresented: $showDeviceInfo, height: 650)  {
             if let info = bluetoothClient.deviceInfo {
                 DeviceInfoView(info: info, isPresented: $showDeviceInfo)
             } else {

TempTrack/Extensions/Data+Extensions.swift

@@ -0,0 +1,43 @@
+import Foundation
+
+enum DeviceInfoError: Error {
+    case missingData
+}
+
+extension Data {
+    
+    mutating func decodeUInt16() throws -> UInt16 {
+        guard count >= 2 else {
+            throw DeviceInfoError.missingData
+        }
+        let low = removeFirst()
+        let high = removeFirst()
+        return UInt16(high: high, low: low)
+    }
+    
+    mutating func decodeTwoByteInteger() throws -> Int {
+        try decodeUInt16().integer
+    }
+    
+    mutating func decodeFourByteInteger() throws -> Int {
+        guard count >= 4 else {
+            throw DeviceInfoError.missingData
+        }
+        let byte0 = removeFirst()
+        let byte1 = removeFirst()
+        let byte2 = removeFirst()
+        let byte3 = removeFirst()
+        return (Int(byte3) << 24) | (Int(byte2) << 16) | (Int(byte1) << 8) | Int(byte0)
+    }
+    
+    mutating func decodeSensor() throws -> TemperatureSensor? {
+        guard count >= 11 else {
+            throw DeviceInfoError.missingData
+        }
+        let address = Array(self[startIndex..<startIndex+8])
+        removeFirst(8)
+        let temperatureByte = removeFirst()
+        let time = try decodeUInt16()
+        return .init(address: address, valueByte: temperatureByte, secondsAgo: time)
+    }
+}

TempTrack/Extensions/Date+Extensions.swift

@@ -62,4 +62,12 @@ extension Date {
     var startOfNextDay: Date {
         startOfDay.addingTimeInterval(86400)
     }
+    
+    func adding(seconds: Int) -> Date {
+        addingTimeInterval(TimeInterval(seconds))
+    }
+    
+    var nearestSecond: Date {
+        .init(seconds: seconds)
+    }
 }

TempTrack/Extensions/Int+Extensions.swift

@@ -0,0 +1,27 @@
+import Foundation
+
+extension Int {
+    
+    var twoByteData: Data {
+        let value = UInt16(clamping: self)
+        return Data([value.low, value.high])
+    }
+    
+    var fourByteData: Data {
+        let value = UInt32(clamping: self)
+        return Data([
+            UInt8(value & 0xFF),
+            UInt8((value >>  8) & 0xFF),
+            UInt8((value >> 16) & 0xFF),
+            UInt8((value >> 24) & 0xFF)
+        ])
+    }
+    
+    init(uint32 byte0: UInt8, _ byte1: UInt8, _ byte2: UInt8, _ byte3: UInt8) {
+        self = (Int(byte0) << 24) | (Int(byte1) << 16) | (Int(byte2) << 8) | Int(byte3)
+    }
+    
+    init(high: UInt8, low: UInt8) {
+        self = Int(high) << 8 + Int(low)
+    }
+}

TempTrack/Extensions/UInt16+Extensions.swift

@@ -0,0 +1,20 @@
+import Foundation
+
+extension UInt16 {
+    
+    init(high: UInt8, low: UInt8) {
+        self = UInt16(high) << 8 + UInt16(low)
+    }
+    
+    var low: UInt8 {
+        UInt8(clamping: self)
+    }
+    
+    var high: UInt8 {
+        UInt8(clamping: self >> 8)
+    }
+    
+    var integer: Int {
+        .init(self)
+    }
+}

TempTrack/Temperature/TemperatureDataTransfer.swift

@@ -34,7 +34,7 @@ final class TemperatureDataTransfer {
     
     init(info: DeviceInfo) {
         self.interval = info.measurementInterval
-        let recordingTime = info.numberOfMeasurements * info.measurementInterval
+        let recordingTime = info.numberOfStoredMeasurements * info.measurementInterval
         self.startDateOfCurrentTransfer = info.nextMeasurement.addingTimeInterval(-TimeInterval(recordingTime))
         self.size = info.numberOfRecordedBytes
         self.blockSize = info.transferBlockSize

TempTrack/Views/DeviceInfoView.swift

@@ -94,26 +94,30 @@ struct DeviceInfoView: View {
                         Text("Not connected")
                     }
                 }
-            
             }
     }
     
     var updateText: String {
+        guard info.receivedDate.secondsToNow > 3 else {
+            return "Updated Now"
+        }
         return "Updated \(info.receivedDate.timePassedText)"
     }
     
+    var clockOffsetText: String {
+        guard info.hasDeviceStartTimeSet else {
+            return "Clock not synchronized"
+        }
+        let offset = info.clockOffset.roundedInt
+        guard abs(offset) > 1 else {
+            return "No clock offset"
+        }
+        return "Offset: \(offset) seconds"
+    }
+    
     var body: some View {
+        NavigationView {
             VStack(alignment: .leading, spacing: 5) {
-            HStack {
-                Text("Device Info").font(.title2).bold()
-                Spacer()
-                Button(action: { isPresented = false }) {
-                    Image(systemSymbol: .xmarkCircleFill)
-                        .foregroundColor(.gray)
-                        .font(.system(size: 26))
-                }
-            }
-            .padding(.bottom)
                 VStack(alignment: .leading, spacing: 5) {
                     Text("Recording")
                         .font(.headline)
@@ -128,6 +132,11 @@ struct DeviceInfoView: View {
                             .frame(width: 30)
                         Text("\(runTimeString)")
                     }
+                    HStack {
+                        Image(systemSymbol: .clockBadgeExclamationmark)
+                            .frame(width: 30)
+                        Text(clockOffsetText)
+                    }
                     HStack {
                         Image(systemSymbol: .stopwatch)
                             .frame(width: 30)
@@ -147,7 +156,7 @@ struct DeviceInfoView: View {
                     HStack {
                         Image(systemSymbol: .speedometer)
                             .frame(width: 30)
-                    Text("\(info.numberOfMeasurements) Measurements")
+                        Text("\(info.numberOfStoredMeasurements) Measurements (\(info.totalNumberOfMeasurements) total)")
                     }
                     HStack {
                         Image(systemSymbol: storageIcon)
@@ -172,14 +181,18 @@ struct DeviceInfoView: View {
                     }
                     Spacer()
                 }
-        }.padding()
+            }
+            .padding()
+            .navigationTitle("Device Info")
+            .navigationBarTitleDisplayMode(.large)
+        }
     }
 }
 
 struct DeviceInfoView_Previews: PreviewProvider {
     static var previews: some View {
         DeviceInfoView(info: .mock, isPresented: .constant(true))
-            .previewLayout(.fixed(width: 375, height: 600))
+            .previewLayout(.fixed(width: 375, height: 650))
     }
 }