feat(telemetry): implement CoreAudio audio devices telemetry provider (fixes #21)

MacMonitor.xcodeproj/project.pbxproj

@@ -12,10 +12,12 @@
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+		22CA7351A745F7837E487051 /* MMPeripheralsTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D1486E1512594482380CB492 /* MMPeripheralsTests.swift */; };
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 		4419FE7554489B23976E2970 /* MMCPULoadProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = D68FC8100D08DB6202F46339 /* MMCPULoadProvider.m */; };
+		4752C49841375B88194F7635 /* MMPeripheralsProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 2E6A10A13A49E22E51862895 /* MMPeripheralsProvider.m */; };
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@@ -27,12 +29,14 @@
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 		88387CDAE2AC1CC74EF89B57 /* MacMonitorApp.swift in Sources */ = {isa = PBXBuildFile; fileRef = ADEA6BD38BA8D887B1DB64A9 /* MacMonitorApp.swift */; };
+		8EDDC2171C55B6E7FC999DAB /* MMBatteryTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 9C92D0D2B62B3081ECCA9920 /* MMBatteryTelemetryProvider.m */; };
 		901EF4853E785A2856E54BC9 /* MMKernelTelemetryTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = DE40072F9A1F9DBD1C48A3B1 /* MMKernelTelemetryTests.swift */; };
 		925245C5B5F8D8DA3C89C4BA /* MMComponentThermalProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = C65F5835516BC2A65BCE25D2 /* MMComponentThermalProvider.m */; };
 		93EF83FE087C6DEAAE3EC0CC /* MMProcessTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 728C692778909D2B7451C07B /* MMProcessTelemetryProvider.m */; };
 		951DBA5D3BBAB753322A5DF9 /* MMLoadAverageProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = B5F2256DF514DD737306302B /* MMLoadAverageProvider.m */; };
 		9B5C651AD2AF7DE2738F0C44 /* MMPowerTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = D48698681374BD25B980C000 /* MMPowerTests.swift */; };
 		9BCE74C5454F81EF80492E75 /* MacMonitorTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 2EC3EDFCD5C50CB352FCED87 /* MacMonitorTests.swift */; };
+		9D12825C7904FB0DAE664CA0 /* MMAudioTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 10D16E1ABE6D28B676EA83FF /* MMAudioTests.swift */; };
 		A521961E035DD50ED8B0C1A9 /* MMKernelTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = F444F4543F0A7421C8F8E636 /* MMKernelTelemetryProvider.m */; };
 		A599E974E56F0B8D94A7E480 /* MMNetworkSocketsProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = D78F76C1996D7FCA241CE532 /* MMNetworkSocketsProvider.m */; };
 		A7609CE56D49EC3419987468 /* SystemTelemetryStore.swift in Sources */ = {isa = PBXBuildFile; fileRef = E4B4E94FB2886C60D5548A2A /* SystemTelemetryStore.swift */; };
@@ -40,7 +44,9 @@
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 		AE3C28BDC3CEF40A9E8F2B20 /* MMGPUTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 80A0F723121CDF9597316F58 /* MMGPUTests.swift */; };
 		B9C2D6574E808B517BA34C83 /* MMMemoryTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 991AEEAF262F3C6BE930BC77 /* MMMemoryTelemetryProvider.m */; };
+		BC487DB86227F09CB0603894 /* MMBatteryTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = B0EB61D811D989279BCBE478 /* MMBatteryTests.swift */; };
 		CD91FC663B19DA1FEA3D49D7 /* MMAppleSMCClient.m in Sources */ = {isa = PBXBuildFile; fileRef = 5555436CD3CB8A73F5D6504F /* MMAppleSMCClient.m */; };
+		D7784A61FE4635275CFB3D6C /* MMAudioTelemetryProvider.m in Sources */ = {isa = PBXBuildFile; fileRef = 3189D2403E6E984D4924AE4D /* MMAudioTelemetryProvider.m */; };
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 		E6F2F695B8D3E7045967C082 /* MMFanTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = 336CEE35A745F3C7E9F70F43 /* MMFanTests.swift */; };
 		EAFAF5A10502D4ACC64F4720 /* MMTelemetryCoordinator.m in Sources */ = {isa = PBXBuildFile; fileRef = F9F9AD1268F906761032AF4D /* MMTelemetryCoordinator.m */; };
@@ -67,12 +73,16 @@
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 		0F2BD3777A674DC4EB442890 /* MMCPUThermalTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMCPUThermalTests.swift; sourceTree = "<group>"; };
+		10D16E1ABE6D28B676EA83FF /* MMAudioTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMAudioTests.swift; sourceTree = "<group>"; };
 		1AD9EEE571CD904BBCD1C96B /* MMSMCParser.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMSMCParser.h; sourceTree = "<group>"; };
 		1B07A683AD0EFBA8E1FB6C9D /* MMProcessDetailInspector.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMProcessDetailInspector.h; sourceTree = "<group>"; };
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 		2C55E977DBFBE7FF04621608 /* MMLoadAverageProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMLoadAverageProvider.h; sourceTree = "<group>"; };
+		2DC6E55C9D3F646A1C62133D /* MMBatteryTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMBatteryTelemetryProvider.h; sourceTree = "<group>"; };
+		2E6A10A13A49E22E51862895 /* MMPeripheralsProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMPeripheralsProvider.m; sourceTree = "<group>"; };
 		2EC3EDFCD5C50CB352FCED87 /* MacMonitorTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MacMonitorTests.swift; sourceTree = "<group>"; };
+		3189D2403E6E984D4924AE4D /* MMAudioTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMAudioTelemetryProvider.m; sourceTree = "<group>"; };
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 		374B1BF631CC4738CB52CA3B /* MMNetworkSocketsTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMNetworkSocketsTests.swift; sourceTree = "<group>"; };
@@ -89,6 +99,7 @@
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 		57845310A3D4EC67E48A3B11 /* MMCPULoadProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMCPULoadProvider.h; sourceTree = "<group>"; };
+		5C45D1EB09E045A53A154136 /* MMAudioTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMAudioTelemetryProvider.h; sourceTree = "<group>"; };
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@@ -101,15 +112,19 @@
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+		9C92D0D2B62B3081ECCA9920 /* MMBatteryTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMBatteryTelemetryProvider.m; sourceTree = "<group>"; };
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 		AFA681E2464EA78CC19B54E0 /* MMDiskIOProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMDiskIOProvider.h; sourceTree = "<group>"; };
+		B0EB61D811D989279BCBE478 /* MMBatteryTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMBatteryTests.swift; sourceTree = "<group>"; };
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 		C9ED8F75E082D4F8AC2FF2F5 /* MMFanTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMFanTelemetryProvider.m; sourceTree = "<group>"; };
 		CBA91906CA8B7936CC82A36B /* MMPowerTelemetryProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMPowerTelemetryProvider.h; sourceTree = "<group>"; };
+		CDE2777944B8F12EC7D2EAB5 /* MMPeripheralsProvider.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = MMPeripheralsProvider.h; sourceTree = "<group>"; };
+		D1486E1512594482380CB492 /* MMPeripheralsTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMPeripheralsTests.swift; sourceTree = "<group>"; };
 		D48698681374BD25B980C000 /* MMPowerTests.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = MMPowerTests.swift; sourceTree = "<group>"; };
 		D61AB99733A4AA52459BA7C4 /* MMGPUTelemetryProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMGPUTelemetryProvider.m; sourceTree = "<group>"; };
 		D68FC8100D08DB6202F46339 /* MMCPULoadProvider.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = MMCPULoadProvider.m; sourceTree = "<group>"; };
@@ -188,6 +203,15 @@
 			path = Core;
 			sourceTree = "<group>";
 		};
+		65251E6B5694734BAAF1C1F1 /* Peripherals */ = {
+			isa = PBXGroup;
+			children = (
+				CDE2777944B8F12EC7D2EAB5 /* MMPeripheralsProvider.h */,
+				2E6A10A13A49E22E51862895 /* MMPeripheralsProvider.m */,
+			);
+			path = Peripherals;
+			sourceTree = "<group>";
+		};
 		78383CED205BCA772701AE48 /* CPU */ = {
 			isa = PBXGroup;
 			children = (
@@ -211,6 +235,8 @@
 		8B31CE7F9319FEC373E6CDC6 /* Power */ = {
 			isa = PBXGroup;
 			children = (
+				2DC6E55C9D3F646A1C62133D /* MMBatteryTelemetryProvider.h */,
+				9C92D0D2B62B3081ECCA9920 /* MMBatteryTelemetryProvider.m */,
 				CBA91906CA8B7936CC82A36B /* MMPowerTelemetryProvider.h */,
 				02F5FDE260999C39E978D849 /* MMPowerTelemetryProvider.m */,
 			);
@@ -220,12 +246,14 @@
 		8BF79E3BCB76E7A1669DC930 /* Telemetry */ = {
 			isa = PBXGroup;
 			children = (
+				92E1EF545807CF318620FEAA /* Audio */,
 				78383CED205BCA772701AE48 /* CPU */,
 				AD2995435E44FA3E1790A4F3 /* Fan */,
 				F99AF003017BA9F19F7AEB1E /* GPU */,
 				CA2F30473D63EC64CBD65437 /* Kernel */,
 				EE2F5EFC9DC33CEDA79A131F /* Memory */,
 				901D54FEAB6E9D6E787E599D /* Network */,
+				65251E6B5694734BAAF1C1F1 /* Peripherals */,
 				8B31CE7F9319FEC373E6CDC6 /* Power */,
 				8719744C366432DD7C2B9644 /* Process */,
 				B6EB3F6545276C40212C2992 /* Storage */,
@@ -246,6 +274,15 @@
 			path = Network;
 			sourceTree = "<group>";
 		};
+		92E1EF545807CF318620FEAA /* Audio */ = {
+			isa = PBXGroup;
+			children = (
+				5C45D1EB09E045A53A154136 /* MMAudioTelemetryProvider.h */,
+				3189D2403E6E984D4924AE4D /* MMAudioTelemetryProvider.m */,
+			);
+			path = Audio;
+			sourceTree = "<group>";
+		};
 		9844EC526E3527F6A582179F /* Hardware */ = {
 			isa = PBXGroup;
 			children = (
@@ -296,6 +333,8 @@
 			isa = PBXGroup;
 			children = (
 				2EC3EDFCD5C50CB352FCED87 /* MacMonitorTests.swift */,
+				10D16E1ABE6D28B676EA83FF /* MMAudioTests.swift */,
+				B0EB61D811D989279BCBE478 /* MMBatteryTests.swift */,
 				B288C7402E2C00E75F8CD016 /* MMComponentThermalTests.swift */,
 				4CE92B1A8D7FDBB6499448E1 /* MMCPULoadTests.swift */,
 				0F2BD3777A674DC4EB442890 /* MMCPUThermalTests.swift */,
@@ -307,6 +346,7 @@
 				099DCF7EF03A58ADA40A94A1 /* MMMemoryTests.swift */,
 				27C612287333D757C92A076A /* MMNetworkBandwidthTests.swift */,
 				374B1BF631CC4738CB52CA3B /* MMNetworkSocketsTests.swift */,
+				D1486E1512594482380CB492 /* MMPeripheralsTests.swift */,
 				D48698681374BD25B980C000 /* MMPowerTests.swift */,
 				7187632FF63B3B0D07FE9194 /* MMProcessDetailsTests.swift */,
 				52471E871E5CC1E444318070 /* MMProcessTests.swift */,
@@ -450,6 +490,8 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				9D12825C7904FB0DAE664CA0 /* MMAudioTests.swift in Sources */,
+				BC487DB86227F09CB0603894 /* MMBatteryTests.swift in Sources */,
 				160334CC765E091A7CBE21AA /* MMCPULoadTests.swift in Sources */,
 				87818E46CEA5145A8215D0E3 /* MMCPUThermalTests.swift in Sources */,
 				57BA02AE1CE24DBD02BD03A4 /* MMComponentThermalTests.swift in Sources */,
@@ -461,6 +503,7 @@
 				6201FD599FED061F6C736E8B /* MMMemoryTests.swift in Sources */,
 				5D31906EA986E2BA92E86FA8 /* MMNetworkBandwidthTests.swift in Sources */,
 				4C1A92F4DEF4C824976115C2 /* MMNetworkSocketsTests.swift in Sources */,
+				22CA7351A745F7837E487051 /* MMPeripheralsTests.swift in Sources */,
 				9B5C651AD2AF7DE2738F0C44 /* MMPowerTests.swift in Sources */,
 				3BA6709B727B1AAC6C4310B5 /* MMProcessDetailsTests.swift in Sources */,
 				7C9AE2ADAED52E593B52F3AE /* MMProcessTests.swift in Sources */,
@@ -476,6 +519,8 @@
 			files = (
 				A9FCAEC0BF27A419DB148C4A /* ContentView.swift in Sources */,
 				CD91FC663B19DA1FEA3D49D7 /* MMAppleSMCClient.m in Sources */,
+				D7784A61FE4635275CFB3D6C /* MMAudioTelemetryProvider.m in Sources */,
+				8EDDC2171C55B6E7FC999DAB /* MMBatteryTelemetryProvider.m in Sources */,
 				4419FE7554489B23976E2970 /* MMCPULoadProvider.m in Sources */,
 				87A9E18362486D0D385BBC4A /* MMCPUThermalProvider.m in Sources */,
 				925245C5B5F8D8DA3C89C4BA /* MMComponentThermalProvider.m in Sources */,
@@ -487,6 +532,7 @@
 				B9C2D6574E808B517BA34C83 /* MMMemoryTelemetryProvider.m in Sources */,
 				E3CCE93A7D4D1EB0187D3E52 /* MMNetworkBandwidthProvider.m in Sources */,
 				A599E974E56F0B8D94A7E480 /* MMNetworkSocketsProvider.m in Sources */,
+				4752C49841375B88194F7635 /* MMPeripheralsProvider.m in Sources */,
 				0A7117B3B7CC7112F2527574 /* MMPowerTelemetryProvider.m in Sources */,
 				2C0F7AB93691ED8AA86FBCF0 /* MMProcessDetailInspector.m in Sources */,
 				93EF83FE087C6DEAAE3EC0CC /* MMProcessTelemetryProvider.m in Sources */,

Sources/Bridging/MacMonitor-Bridging-Header.h

@@ -27,5 +27,8 @@
 #import "MMProcessTelemetryProvider.h"
 #import "MMProcessDetailInspector.h"
 #import "MMGPUTelemetryProvider.h"
+#import "MMBatteryTelemetryProvider.h"
+#import "MMPeripheralsProvider.h"
+#import "MMAudioTelemetryProvider.h"
 
 #endif /* MacMonitor_Bridging_Header_h */

Sources/Telemetry/Audio/MMAudioTelemetryProvider.h

@@ -0,0 +1,40 @@
+//
+//  MMAudioTelemetryProvider.h
+//  MacMonitor
+//
+//  Telemetry provider enumerating CoreAudio input/output devices, sample rates, volume, and active status.
+//
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MMAudioDevice : NSObject
+
+@property (nonatomic, assign) uint32_t deviceID;
+@property (nonatomic, copy) NSString *name;
+@property (nonatomic, copy) NSString *manufacturer;
+@property (nonatomic, copy) NSString *uid;
+@property (nonatomic, assign) BOOL isInput;
+@property (nonatomic, assign) BOOL isOutput;
+@property (nonatomic, assign) BOOL isDefaultInput;
+@property (nonatomic, assign) BOOL isDefaultOutput;
+@property (nonatomic, assign) double sampleRate;
+@property (nonatomic, assign) uint32_t channelCount;
+@property (nonatomic, assign) float volume;
+@property (nonatomic, assign) BOOL isMuted;
+
+- (NSDictionary<NSString *, id> *)toDictionary;
+
+@end
+
+@interface MMAudioTelemetryProvider : NSObject <MMTelemetryProvider>
+
+- (instancetype)init;
+
++ (NSArray<MMAudioDevice *> *)sampleAudioDevices;
+
+@end
+
+NS_ASSUME_NONNULL_END

Sources/Telemetry/Audio/MMAudioTelemetryProvider.m

@@ -0,0 +1,232 @@
+//
+//  MMAudioTelemetryProvider.m
+//  MacMonitor
+//
+//  Telemetry provider enumerating CoreAudio input/output devices, sample rates, volume, and active status.
+//
+
+#import "MMAudioTelemetryProvider.h"
+#import <CoreAudio/CoreAudio.h>
+
+@implementation MMAudioDevice
+
+- (NSDictionary<NSString *, id> *)toDictionary {
+    return @{
+        @"deviceID": @(self.deviceID),
+        @"name": self.name ?: @"Unknown Audio Device",
+        @"manufacturer": self.manufacturer ?: @"Unknown",
+        @"uid": self.uid ?: @"",
+        @"isInput": @(self.isInput),
+        @"isOutput": @(self.isOutput),
+        @"isDefaultInput": @(self.isDefaultInput),
+        @"isDefaultOutput": @(self.isDefaultOutput),
+        @"sampleRate": @(self.sampleRate),
+        @"channelCount": @(self.channelCount),
+        @"volume": @(roundf(self.volume * 100.0f) / 100.0f),
+        @"isMuted": @(self.isMuted)
+    };
+}
+
+@end
+
+@implementation MMAudioTelemetryProvider
+
+- (instancetype)init {
+    self = [super init];
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainAudio;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.audio";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
++ (AudioDeviceID)defaultDeviceForProperty:(AudioObjectPropertySelector)selector {
+    AudioObjectPropertyAddress address = {
+        .mSelector = selector,
+        .mScope = kAudioObjectPropertyScopeGlobal,
+        .mElement = kAudioObjectPropertyElementMain
+    };
+    AudioDeviceID deviceID = kAudioObjectUnknown;
+    UInt32 size = sizeof(AudioDeviceID);
+    OSStatus status = AudioObjectGetPropertyData(kAudioObjectSystemObject, &address, 0, NULL, &size, &deviceID);
+    if (status == noErr) {
+        return deviceID;
+    }
+    return kAudioObjectUnknown;
+}
+
++ (NSArray<MMAudioDevice *> *)sampleAudioDevices {
+    AudioObjectPropertyAddress address = {
+        .mSelector = kAudioHardwarePropertyDevices,
+        .mScope = kAudioObjectPropertyScopeGlobal,
+        .mElement = kAudioObjectPropertyElementMain
+    };
+    
+    UInt32 dataSize = 0;
+    OSStatus status = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject, &address, 0, NULL, &dataSize);
+    if (status != noErr || dataSize == 0) {
+        return @[];
+    }
+    
+    UInt32 deviceCount = dataSize / sizeof(AudioDeviceID);
+    AudioDeviceID *deviceIDs = (AudioDeviceID *)malloc(dataSize);
+    if (!deviceIDs) return @[];
+    
+    status = AudioObjectGetPropertyData(kAudioObjectSystemObject, &address, 0, NULL, &dataSize, deviceIDs);
+    if (status != noErr) {
+        free(deviceIDs);
+        return @[];
+    }
+    
+    AudioDeviceID defaultIn = [self defaultDeviceForProperty:kAudioHardwarePropertyDefaultInputDevice];
+    AudioDeviceID defaultOut = [self defaultDeviceForProperty:kAudioHardwarePropertyDefaultOutputDevice];
+    
+    NSMutableArray<MMAudioDevice *> *devices = [NSMutableArray arrayWithCapacity:deviceCount];
+    
+    for (UInt32 i = 0; i < deviceCount; i++) {
+        AudioDeviceID devID = deviceIDs[i];
+        
+        // Name
+        CFStringRef nameRef = NULL;
+        UInt32 propSize = sizeof(CFStringRef);
+        AudioObjectPropertyAddress nameAddr = {
+            .mSelector = kAudioObjectPropertyName,
+            .mScope = kAudioObjectPropertyScopeGlobal,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        NSString *name = @"Audio Device";
+        if (AudioObjectGetPropertyData(devID, &nameAddr, 0, NULL, &propSize, &nameRef) == noErr && nameRef) {
+            name = (__bridge_transfer NSString *)nameRef;
+        }
+        
+        // Manufacturer
+        CFStringRef mfrRef = NULL;
+        propSize = sizeof(CFStringRef);
+        AudioObjectPropertyAddress mfrAddr = {
+            .mSelector = kAudioObjectPropertyManufacturer,
+            .mScope = kAudioObjectPropertyScopeGlobal,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        NSString *mfr = @"Apple Inc.";
+        if (AudioObjectGetPropertyData(devID, &mfrAddr, 0, NULL, &propSize, &mfrRef) == noErr && mfrRef) {
+            mfr = (__bridge_transfer NSString *)mfrRef;
+        }
+        
+        // UID
+        CFStringRef uidRef = NULL;
+        propSize = sizeof(CFStringRef);
+        AudioObjectPropertyAddress uidAddr = {
+            .mSelector = kAudioDevicePropertyDeviceUID,
+            .mScope = kAudioObjectPropertyScopeGlobal,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        NSString *uid = @"";
+        if (AudioObjectGetPropertyData(devID, &uidAddr, 0, NULL, &propSize, &uidRef) == noErr && uidRef) {
+            uid = (__bridge_transfer NSString *)uidRef;
+        }
+        
+        // Channels & Input / Output determination
+        AudioObjectPropertyAddress inputStreamsAddr = {
+            .mSelector = kAudioDevicePropertyStreams,
+            .mScope = kAudioDevicePropertyScopeInput,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        UInt32 inStreamSize = 0;
+        AudioObjectGetPropertyDataSize(devID, &inputStreamsAddr, 0, NULL, &inStreamSize);
+        BOOL isInput = (inStreamSize > 0);
+        
+        AudioObjectPropertyAddress outputStreamsAddr = {
+            .mSelector = kAudioDevicePropertyStreams,
+            .mScope = kAudioDevicePropertyScopeOutput,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        UInt32 outStreamSize = 0;
+        AudioObjectGetPropertyDataSize(devID, &outputStreamsAddr, 0, NULL, &outStreamSize);
+        BOOL isOutput = (outStreamSize > 0);
+        
+        // Sample rate
+        Float64 sampleRate = 0.0;
+        propSize = sizeof(Float64);
+        AudioObjectPropertyAddress rateAddr = {
+            .mSelector = kAudioDevicePropertyNominalSampleRate,
+            .mScope = kAudioObjectPropertyScopeGlobal,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        AudioObjectGetPropertyData(devID, &rateAddr, 0, NULL, &propSize, &sampleRate);
+        
+        // Volume
+        Float32 volume = 0.0f;
+        AudioObjectPropertyScope volScope = isOutput ? kAudioDevicePropertyScopeOutput : kAudioDevicePropertyScopeInput;
+        AudioObjectPropertyAddress volAddr = {
+            .mSelector = kAudioDevicePropertyVolumeScalar,
+            .mScope = volScope,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        propSize = sizeof(Float32);
+        if (AudioObjectHasProperty(devID, &volAddr)) {
+            AudioObjectGetPropertyData(devID, &volAddr, 0, NULL, &propSize, &volume);
+        }
+        
+        // Mute status
+        UInt32 mute = 0;
+        AudioObjectPropertyAddress muteAddr = {
+            .mSelector = kAudioDevicePropertyMute,
+            .mScope = volScope,
+            .mElement = kAudioObjectPropertyElementMain
+        };
+        propSize = sizeof(UInt32);
+        if (AudioObjectHasProperty(devID, &muteAddr)) {
+            AudioObjectGetPropertyData(devID, &muteAddr, 0, NULL, &propSize, &mute);
+        }
+        
+        MMAudioDevice *device = [[MMAudioDevice alloc] init];
+        device.deviceID = devID;
+        device.name = name;
+        device.manufacturer = mfr;
+        device.uid = uid;
+        device.isInput = isInput;
+        device.isOutput = isOutput;
+        device.isDefaultInput = (devID == defaultIn);
+        device.isDefaultOutput = (devID == defaultOut);
+        device.sampleRate = (double)sampleRate;
+        device.channelCount = (inStreamSize / sizeof(AudioStreamID)) + (outStreamSize / sizeof(AudioStreamID));
+        device.volume = volume;
+        device.isMuted = (mute != 0);
+        
+        [devices addObject:device];
+    }
+    
+    free(deviceIDs);
+    return devices;
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    NSArray<MMAudioDevice *> *devices = [MMAudioTelemetryProvider sampleAudioDevices];
+    NSMutableArray<NSDictionary<NSString *, id> *> *deviceList = [NSMutableArray arrayWithCapacity:devices.count];
+    
+    MMAudioDevice *defaultIn = nil;
+    MMAudioDevice *defaultOut = nil;
+    
+    for (MMAudioDevice *d in devices) {
+        [deviceList addObject:[d toDictionary]];
+        if (d.isDefaultInput) defaultIn = d;
+        if (d.isDefaultOutput) defaultOut = d;
+    }
+    
+    return @{
+        @"devices": deviceList,
+        @"deviceCount": @(devices.count),
+        @"defaultInputDevice": defaultIn ? [defaultIn toDictionary] : [NSNull null],
+        @"defaultOutputDevice": defaultOut ? [defaultOut toDictionary] : [NSNull null]
+    };
+}
+
+@end

Sources/Telemetry/Peripherals/MMPeripheralsProvider.h

@@ -0,0 +1,45 @@
+//
+//  MMPeripheralsProvider.h
+//  MacMonitor
+//
+//  Telemetry provider enumerating connected USB, Thunderbolt, and PCI peripheral devices via IOKit.
+//
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+typedef NS_ENUM(NSInteger, MMPeripheralBusType) {
+    MMPeripheralBusTypeUSB,
+    MMPeripheralBusTypeThunderbolt,
+    MMPeripheralBusTypePCI
+};
+
+@interface MMPeripheralDevice : NSObject
+
+@property (nonatomic, copy) NSString *name;
+@property (nonatomic, assign) MMPeripheralBusType busType;
+@property (nonatomic, copy) NSString *vendorName;
+@property (nonatomic, assign) uint32_t vendorID;
+@property (nonatomic, assign) uint32_t productID;
+@property (nonatomic, copy, nullable) NSString *serialNumber;
+@property (nonatomic, copy, nullable) NSString *deviceClass;
+@property (nonatomic, assign) uint64_t locationID;
+@property (nonatomic, assign) BOOL isBuiltIn;
+
+- (NSDictionary<NSString *, id> *)toDictionary;
+
+@end
+
+@interface MMPeripheralsProvider : NSObject <MMTelemetryProvider>
+
+- (instancetype)init;
+
++ (NSArray<MMPeripheralDevice *> *)sampleUSBDevices;
++ (NSArray<MMPeripheralDevice *> *)sampleThunderboltDevices;
++ (NSArray<MMPeripheralDevice *> *)samplePCIDevices;
+
+@end
+
+NS_ASSUME_NONNULL_END

Sources/Telemetry/Peripherals/MMPeripheralsProvider.m

@@ -0,0 +1,255 @@
+//
+//  MMPeripheralsProvider.m
+//  MacMonitor
+//
+//  Telemetry provider enumerating connected USB, Thunderbolt, and PCI peripheral devices via IOKit.
+//
+
+#import "MMPeripheralsProvider.h"
+#import <IOKit/IOKitLib.h>
+
+@implementation MMPeripheralDevice
+
+- (NSDictionary<NSString *, id> *)toDictionary {
+    NSString *busStr = @"USB";
+    if (self.busType == MMPeripheralBusTypeThunderbolt) {
+        busStr = @"Thunderbolt";
+    } else if (self.busType == MMPeripheralBusTypePCI) {
+        busStr = @"PCI";
+    }
+    
+    return @{
+        @"name": self.name ?: @"Unknown Device",
+        @"busType": busStr,
+        @"vendorName": self.vendorName ?: @"Unknown",
+        @"vendorID": @(self.vendorID),
+        @"productID": @(self.productID),
+        @"serialNumber": self.serialNumber ?: @"",
+        @"deviceClass": self.deviceClass ?: @"",
+        @"locationID": @(self.locationID),
+        @"isBuiltIn": @(self.isBuiltIn)
+    };
+}
+
+@end
+
+@implementation MMPeripheralsProvider
+
+- (instancetype)init {
+    self = [super init];
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainPeripherals;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.peripherals";
+}
+
+- (BOOL)isAvailable {
+    return YES;
+}
+
++ (NSArray<MMPeripheralDevice *> *)sampleUSBDevices {
+    NSMutableArray<MMPeripheralDevice *> *devices = [NSMutableArray array];
+    
+    // Query both IOUSBHostDevice (macOS modern) and IOUSBDevice (legacy/fallback)
+    const char *classes[] = { "IOUSBHostDevice", "IOUSBDevice" };
+    NSMutableSet<NSNumber *> *seenRegistryIDs = [NSMutableSet set];
+    
+    for (int i = 0; i < 2; i++) {
+        CFMutableDictionaryRef matching = IOServiceMatching(classes[i]);
+        if (!matching) continue;
+        
+        io_iterator_t iterator = IO_OBJECT_NULL;
+        kern_return_t kr = IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iterator);
+        if (kr != KERN_SUCCESS || iterator == IO_OBJECT_NULL) continue;
+        
+        io_service_t service = IO_OBJECT_NULL;
+        while ((service = IOIteratorNext(iterator)) != IO_OBJECT_NULL) {
+            uint64_t regID = 0;
+            IORegistryEntryGetRegistryEntryID(service, &regID);
+            if ([seenRegistryIDs containsObject:@(regID)]) {
+                IOObjectRelease(service);
+                continue;
+            }
+            [seenRegistryIDs addObject:@(regID)];
+            
+            CFMutableDictionaryRef props = NULL;
+            if (IORegistryEntryCreateCFProperties(service, &props, kCFAllocatorDefault, 0) == KERN_SUCCESS && props) {
+                NSDictionary *dict = (__bridge NSDictionary *)props;
+                
+                NSString *name = dict[@"USB Product Name"] ?: (dict[@"kUSBProductString"] ?: dict[@"IOName"]);
+                if (!name || name.length == 0) {
+                    name = @"USB Device";
+                }
+                
+                NSString *vendor = dict[@"USB Vendor Name"] ?: (dict[@"kUSBVendorString"] ?: @"");
+                uint32_t vendorID = [dict[@"idVendor"] unsignedIntValue];
+                uint32_t productID = [dict[@"idProduct"] unsignedIntValue];
+                NSString *serial = dict[@"USB Serial Number"] ?: dict[@"kUSBSerialNumberString"];
+                uint64_t locID = [dict[@"locationID"] unsignedLongLongValue];
+                
+                BOOL builtIn = NO;
+                if (dict[@"Built-In"]) {
+                    builtIn = [dict[@"Built-In"] boolValue];
+                } else if ([dict[@"non-removable"] isKindOfClass:[NSString class]]) {
+                    builtIn = [dict[@"non-removable"] isEqualToString:@"yes"];
+                }
+                
+                MMPeripheralDevice *dev = [[MMPeripheralDevice alloc] init];
+                dev.name = name;
+                dev.busType = MMPeripheralBusTypeUSB;
+                dev.vendorName = vendor;
+                dev.vendorID = vendorID;
+                dev.productID = productID;
+                dev.serialNumber = serial;
+                dev.locationID = locID;
+                dev.isBuiltIn = builtIn;
+                
+                [devices addObject:dev];
+                CFRelease(props);
+            }
+            IOObjectRelease(service);
+        }
+        IOObjectRelease(iterator);
+    }
+    
+    return devices;
+}
+
++ (NSArray<MMPeripheralDevice *> *)sampleThunderboltDevices {
+    NSMutableArray<MMPeripheralDevice *> *devices = [NSMutableArray array];
+    
+    CFMutableDictionaryRef matching = IOServiceMatching("IOThunderboltDevice");
+    if (!matching) return devices;
+    
+    io_iterator_t iterator = IO_OBJECT_NULL;
+    kern_return_t kr = IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iterator);
+    if (kr != KERN_SUCCESS || iterator == IO_OBJECT_NULL) return devices;
+    
+    io_service_t service = IO_OBJECT_NULL;
+    while ((service = IOIteratorNext(iterator)) != IO_OBJECT_NULL) {
+        CFMutableDictionaryRef props = NULL;
+        if (IORegistryEntryCreateCFProperties(service, &props, kCFAllocatorDefault, 0) == KERN_SUCCESS && props) {
+            NSDictionary *dict = (__bridge NSDictionary *)props;
+            
+            NSString *name = dict[@"Device Name"] ?: dict[@"IOName"];
+            if (!name) name = @"Thunderbolt Device";
+            
+            NSString *vendor = dict[@"Vendor Name"] ?: @"";
+            uint32_t vendorID = [dict[@"Vendor ID"] unsignedIntValue];
+            uint32_t productID = [dict[@"Device ID"] unsignedIntValue];
+            
+            MMPeripheralDevice *dev = [[MMPeripheralDevice alloc] init];
+            dev.name = name;
+            dev.busType = MMPeripheralBusTypeThunderbolt;
+            dev.vendorName = vendor;
+            dev.vendorID = vendorID;
+            dev.productID = productID;
+            dev.isBuiltIn = NO;
+            
+            [devices addObject:dev];
+            CFRelease(props);
+        }
+        IOObjectRelease(service);
+    }
+    IOObjectRelease(iterator);
+    return devices;
+}
+
+static uint32_t ParseDataUInt32(NSData *data) {
+    if (![data isKindOfClass:[NSData class]] || data.length == 0) return 0;
+    uint32_t val = 0;
+    size_t copyLen = MIN(sizeof(val), data.length);
+    memcpy(&val, data.bytes, copyLen);
+    return val;
+}
+
++ (NSArray<MMPeripheralDevice *> *)samplePCIDevices {
+    NSMutableArray<MMPeripheralDevice *> *devices = [NSMutableArray array];
+    
+    CFMutableDictionaryRef matching = IOServiceMatching("IOPCIDevice");
+    if (!matching) return devices;
+    
+    io_iterator_t iterator = IO_OBJECT_NULL;
+    kern_return_t kr = IOServiceGetMatchingServices(kIOMainPortDefault, matching, &iterator);
+    if (kr != KERN_SUCCESS || iterator == IO_OBJECT_NULL) return devices;
+    
+    io_service_t service = IO_OBJECT_NULL;
+    while ((service = IOIteratorNext(iterator)) != IO_OBJECT_NULL) {
+        CFMutableDictionaryRef props = NULL;
+        if (IORegistryEntryCreateCFProperties(service, &props, kCFAllocatorDefault, 0) == KERN_SUCCESS && props) {
+            NSDictionary *dict = (__bridge NSDictionary *)props;
+            
+            NSString *name = nil;
+            if ([dict[@"model"] isKindOfClass:[NSData class]]) {
+                name = [[NSString alloc] initWithData:dict[@"model"] encoding:NSUTF8StringEncoding];
+                name = [name stringByTrimmingCharactersInSet:[NSCharacterSet controlCharacterSet]];
+            }
+            if (!name || name.length == 0) {
+                name = dict[@"IOName"];
+            }
+            if (!name || name.length == 0) {
+                name = @"PCI Device";
+            }
+            
+            uint32_t vendorID = 0;
+            if ([dict[@"vendor-id"] isKindOfClass:[NSData class]]) {
+                vendorID = ParseDataUInt32(dict[@"vendor-id"]);
+            }
+            
+            uint32_t deviceID = 0;
+            if ([dict[@"device-id"] isKindOfClass:[NSData class]]) {
+                deviceID = ParseDataUInt32(dict[@"device-id"]);
+            }
+            
+            MMPeripheralDevice *dev = [[MMPeripheralDevice alloc] init];
+            dev.name = name;
+            dev.busType = MMPeripheralBusTypePCI;
+            dev.vendorID = vendorID;
+            dev.productID = deviceID;
+            dev.isBuiltIn = YES;
+            
+            [devices addObject:dev];
+            CFRelease(props);
+        }
+        IOObjectRelease(service);
+    }
+    IOObjectRelease(iterator);
+    return devices;
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    NSArray<MMPeripheralDevice *> *usb = [MMPeripheralsProvider sampleUSBDevices];
+    NSArray<MMPeripheralDevice *> *tb = [MMPeripheralsProvider sampleThunderboltDevices];
+    NSArray<MMPeripheralDevice *> *pci = [MMPeripheralsProvider samplePCIDevices];
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *usbList = [NSMutableArray arrayWithCapacity:usb.count];
+    for (MMPeripheralDevice *d in usb) {
+        [usbList addObject:[d toDictionary]];
+    }
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *tbList = [NSMutableArray arrayWithCapacity:tb.count];
+    for (MMPeripheralDevice *d in tb) {
+        [tbList addObject:[d toDictionary]];
+    }
+    
+    NSMutableArray<NSDictionary<NSString *, id> *> *pciList = [NSMutableArray arrayWithCapacity:pci.count];
+    for (MMPeripheralDevice *d in pci) {
+        [pciList addObject:[d toDictionary]];
+    }
+    
+    NSUInteger totalCount = usb.count + tb.count + pci.count;
+    
+    return @{
+        @"totalDeviceCount": @(totalCount),
+        @"usbDevices": usbList,
+        @"thunderboltDevices": tbList,
+        @"pciDevices": pciList
+    };
+}
+
+@end

Sources/Telemetry/Power/MMBatteryTelemetryProvider.h

@@ -0,0 +1,23 @@
+//
+//  MMBatteryTelemetryProvider.h
+//  MacMonitor
+//
+//  Telemetry provider for AppleSmartBattery health, cycle count, capacity, and adapter info.
+//
+
+#import <Foundation/Foundation.h>
+#import "MMTelemetryProvider.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface MMBatteryTelemetryProvider : NSObject <MMTelemetryProvider>
+
+@property (nonatomic, readonly) BOOL hasBattery;
+
+- (instancetype)init;
+
++ (NSDictionary<NSString *, id> *)calculateBatteryHealthWithProperties:(nullable NSDictionary<NSString *, id> *)rawProps;
+
+@end
+
+NS_ASSUME_NONNULL_END

Sources/Telemetry/Power/MMBatteryTelemetryProvider.m

@@ -0,0 +1,179 @@
+//
+//  MMBatteryTelemetryProvider.m
+//  MacMonitor
+//
+//  Telemetry provider for AppleSmartBattery health, cycle count, capacity, and adapter info.
+//
+
+#import "MMBatteryTelemetryProvider.h"
+#import <IOKit/IOKitLib.h>
+#import <IOKit/ps/IOPowerSources.h>
+#import <IOKit/ps/IOPSKeys.h>
+
+@implementation MMBatteryTelemetryProvider
+
+- (instancetype)init {
+    self = [super init];
+    return self;
+}
+
+- (MMTelemetryDomain)domain {
+    return MMTelemetryDomainPower;
+}
+
+- (NSString *)providerIdentifier {
+    return @"com.i3omb.macmonitor.telemetry.battery";
+}
+
+- (BOOL)isAvailable {
+    io_service_t service = IOServiceGetMatchingService(kIOMainPortDefault, IOServiceMatching("AppleSmartBattery"));
+    if (service != IO_OBJECT_NULL) {
+        IOObjectRelease(service);
+        return YES;
+    }
+    return NO;
+}
+
+- (BOOL)hasBattery {
+    return [self isAvailable];
+}
+
++ (NSDictionary<NSString *, id> *)calculateBatteryHealthWithProperties:(nullable NSDictionary<NSString *, id> *)rawProps {
+    if (!rawProps || rawProps.count == 0) {
+        return @{
+            @"hasBattery": @(NO),
+            @"installed": @(NO),
+            @"healthCondition": @"No Battery",
+            @"healthPercent": @(0.0),
+            @"cycleCount": @(0),
+            @"designCycleCount": @(0),
+            @"currentCapacity": @(0),
+            @"maxCapacity": @(0),
+            @"designCapacity": @(0),
+            @"temperature": @(0.0),
+            @"voltage": @(0.0),
+            @"amperage": @(0.0),
+            @"watts": @(0.0),
+            @"isCharging": @(NO),
+            @"isCharged": @(NO),
+            @"externalConnected": @(NO),
+            @"timeRemainingMinutes": @(-1),
+            @"manufacturer": @"N/A",
+            @"serial": @"N/A",
+            @"deviceName": @"N/A"
+        };
+    }
+
+    BOOL installed = [rawProps[@"BatteryInstalled"] boolValue];
+    NSInteger cycleCount = [rawProps[@"CycleCount"] integerValue];
+    NSInteger designCycleCount = rawProps[@"DesignCycleCount9C"] ? [rawProps[@"DesignCycleCount9C"] integerValue] : 1000;
+    
+    NSInteger currentCapacity = [rawProps[@"CurrentCapacity"] integerValue];
+    NSInteger maxCapacity = [rawProps[@"MaxCapacity"] integerValue];
+    
+    // DesignCapacity might be at top level or inside BatteryData
+    NSInteger designCapacity = [rawProps[@"DesignCapacity"] integerValue];
+    if (designCapacity <= 0 && [rawProps[@"BatteryData"] isKindOfClass:[NSDictionary class]]) {
+        designCapacity = [rawProps[@"BatteryData"][@"DesignCapacity"] integerValue];
+    }
+    
+    // Health percentage = (MaxCapacity / DesignCapacity) * 100.0
+    double healthPercent = 0.0;
+    if (designCapacity > 0) {
+        healthPercent = ((double)maxCapacity / (double)designCapacity) * 100.0;
+        if (healthPercent > 100.0) healthPercent = 100.0;
+    } else if (maxCapacity > 0) {
+        healthPercent = 100.0;
+    }
+    
+    // Health condition evaluation
+    NSString *condition = @"Normal";
+    BOOL permanentFailure = [rawProps[@"PermanentFailureStatus"] integerValue] != 0;
+    if (permanentFailure) {
+        condition = @"Permanent Failure";
+    } else if (healthPercent < 70.0 || (designCycleCount > 0 && cycleCount > designCycleCount)) {
+        condition = @"Service Recommended";
+    } else if (healthPercent < 80.0) {
+        condition = @"Fair";
+    } else {
+        condition = @"Normal";
+    }
+    
+    // Temperature: AppleSmartBattery returns in units of 0.01 deg C or 0.1 deg C (e.g. 3151 = 31.51 deg C)
+    double rawTemp = [rawProps[@"Temperature"] doubleValue];
+    double tempC = rawTemp > 1000.0 ? (rawTemp / 100.0) : (rawTemp > 100.0 ? rawTemp / 10.0 : rawTemp);
+    
+    double voltage = [rawProps[@"Voltage"] doubleValue] / 1000.0; // mV -> V
+    
+    // Amperage can be signed 64-bit stored as unsigned in dict
+    int64_t rawAmp = [rawProps[@"InstantAmperage"] longLongValue];
+    if (rawAmp == 0) {
+        rawAmp = [rawProps[@"Amperage"] longLongValue];
+    }
+    int32_t signedAmp = (int32_t)rawAmp; // standard cast from uint32/uint64 representation
+    double amperage = ((double)signedAmp) / 1000.0; // mA -> A
+    double watts = fabs(voltage * amperage);
+    
+    BOOL isCharging = [rawProps[@"IsCharging"] boolValue];
+    BOOL fullyCharged = [rawProps[@"FullyCharged"] boolValue];
+    BOOL externalConnected = [rawProps[@"ExternalConnected"] boolValue];
+    NSInteger timeRemaining = [rawProps[@"TimeRemaining"] integerValue];
+    if (timeRemaining == 65535) {
+        timeRemaining = -1;
+    }
+    
+    NSString *manufacturer = rawProps[@"Manufacturer"] ?: @"Apple";
+    NSString *serial = rawProps[@"Serial"] ?: @"";
+    NSString *deviceName = rawProps[@"DeviceName"] ?: @"";
+    
+    // Power adapter details
+    NSDictionary *adapterDetails = [rawProps[@"AdapterDetails"] isKindOfClass:[NSDictionary class]] ? rawProps[@"AdapterDetails"] : nil;
+    NSInteger adapterWatts = 0;
+    if (adapterDetails && adapterDetails[@"Watts"]) {
+        adapterWatts = [adapterDetails[@"Watts"] integerValue];
+    }
+    
+    return @{
+        @"hasBattery": @(YES),
+        @"installed": @(installed),
+        @"healthCondition": condition,
+        @"healthPercent": @(round(healthPercent * 10.0) / 10.0),
+        @"cycleCount": @(cycleCount),
+        @"designCycleCount": @(designCycleCount),
+        @"currentCapacity": @(currentCapacity),
+        @"maxCapacity": @(maxCapacity),
+        @"designCapacity": @(designCapacity),
+        @"temperature": @(round(tempC * 10.0) / 10.0),
+        @"voltage": @(round(voltage * 100.0) / 100.0),
+        @"amperage": @(round(amperage * 100.0) / 100.0),
+        @"watts": @(round(watts * 10.0) / 10.0),
+        @"isCharging": @(isCharging),
+        @"isCharged": @(fullyCharged),
+        @"externalConnected": @(externalConnected),
+        @"timeRemainingMinutes": @(timeRemaining),
+        @"manufacturer": manufacturer,
+        @"serial": serial,
+        @"deviceName": deviceName,
+        @"adapterWatts": @(adapterWatts)
+    };
+}
+
+- (nullable NSDictionary<NSString *, id> *)sampleTelemetryWithError:(NSError **)error {
+    io_service_t service = IOServiceGetMatchingService(kIOMainPortDefault, IOServiceMatching("AppleSmartBattery"));
+    if (service == IO_OBJECT_NULL) {
+        return [MMBatteryTelemetryProvider calculateBatteryHealthWithProperties:nil];
+    }
+    
+    CFMutableDictionaryRef props = NULL;
+    kern_return_t kr = IORegistryEntryCreateCFProperties(service, &props, kCFAllocatorDefault, 0);
+    IOObjectRelease(service);
+    
+    if (kr != KERN_SUCCESS || !props) {
+        return [MMBatteryTelemetryProvider calculateBatteryHealthWithProperties:nil];
+    }
+    
+    NSDictionary *dict = (__bridge_transfer NSDictionary *)props;
+    return [MMBatteryTelemetryProvider calculateBatteryHealthWithProperties:dict];
+}
+
+@end

Tests/MMAudioTests.swift

@@ -0,0 +1,80 @@
+//
+//  MMAudioTests.swift
+//  MacMonitorTests
+//
+//  Unit and integration tests for MMAudioTelemetryProvider.
+//
+
+import XCTest
+@testable import MacMonitor
+
+final class MMAudioTests: XCTestCase {
+    var provider: MMAudioTelemetryProvider!
+
+    override func setUp() {
+        super.setUp()
+        provider = MMAudioTelemetryProvider()
+    }
+
+    override func tearDown() {
+        provider = nil
+        super.tearDown()
+    }
+
+    func testDomainAndIdentifier() {
+        XCTAssertEqual(provider.domain, .audio)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.audio")
+        XCTAssertTrue(provider.isAvailable)
+    }
+
+    func testSampleAudioDevicesLive() {
+        do {
+            let sample = try provider.sampleTelemetry()
+            XCTAssertNotNil(sample)
+            
+            let count = sample["deviceCount"] as? Int ?? 0
+            XCTAssertGreaterThanOrEqual(count, 0)
+            
+            let devices = sample["devices"] as? [[String: Any]] ?? []
+            XCTAssertEqual(devices.count, count)
+            
+            if count > 0 {
+                for dev in devices {
+                    XCTAssertNotNil(dev["name"])
+                    XCTAssertNotNil(dev["deviceID"])
+                    XCTAssertNotNil(dev["isInput"])
+                    XCTAssertNotNil(dev["isOutput"])
+                }
+            }
+        } catch {
+            XCTFail("sampleTelemetry threw error: \(error)")
+        }
+    }
+
+    func testAudioDeviceModel() {
+        let dev = MMAudioDevice()
+        dev.deviceID = 42
+        dev.name = "External USB DAC"
+        dev.manufacturer = "FiiO"
+        dev.uid = "USB:1234"
+        dev.isInput = false
+        dev.isOutput = true
+        dev.isDefaultOutput = true
+        dev.isDefaultInput = false
+        dev.sampleRate = 96000.0
+        dev.channelCount = 2
+        dev.volume = 0.75
+        dev.isMuted = false
+
+        let dict = dev.toDictionary()
+        XCTAssertEqual(dict["deviceID"] as? UInt32, 42)
+        XCTAssertEqual(dict["name"] as? String, "External USB DAC")
+        XCTAssertEqual(dict["manufacturer"] as? String, "FiiO")
+        XCTAssertEqual(dict["isOutput"] as? Bool, true)
+        XCTAssertEqual(dict["isDefaultOutput"] as? Bool, true)
+        XCTAssertEqual(dict["sampleRate"] as? Double, 96000.0)
+        XCTAssertEqual(dict["channelCount"] as? UInt32, 2)
+        XCTAssertEqual(dict["volume"] as? Float, 0.75)
+        XCTAssertEqual(dict["isMuted"] as? Bool, false)
+    }
+}

Tests/MMBatteryTests.swift

@@ -0,0 +1,109 @@
+//
+//  MMBatteryTests.swift
+//  MacMonitorTests
+//
+//  Unit and integration tests for MMBatteryTelemetryProvider.
+//
+
+import XCTest
+@testable import MacMonitor
+
+final class MMBatteryTests: XCTestCase {
+    var provider: MMBatteryTelemetryProvider!
+
+    override func setUp() {
+        super.setUp()
+        provider = MMBatteryTelemetryProvider()
+    }
+
+    override func tearDown() {
+        provider = nil
+        super.tearDown()
+    }
+
+    func testDomainAndIdentifier() {
+        XCTAssertEqual(provider.domain, .power)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.battery")
+    }
+
+    func testCalculateBatteryHealthWithSimulatedNormalBattery() {
+        let raw: [String: Any] = [
+            "BatteryInstalled": true,
+            "CycleCount": 250,
+            "DesignCycleCount9C": 1000,
+            "CurrentCapacity": 3000,
+            "MaxCapacity": 4000,
+            "DesignCapacity": 4400,
+            "Temperature": 3150, // 31.5 C
+            "Voltage": 11100, // 11.1 V
+            "Amperage": -1500, // -1.5 A
+            "IsCharging": false,
+            "FullyCharged": false,
+            "ExternalConnected": false,
+            "TimeRemaining": 120,
+            "Manufacturer": "SMP",
+            "Serial": "TEST123456",
+            "DeviceName": "bq20z451"
+        ]
+
+        let health = MMBatteryTelemetryProvider.calculateBatteryHealth(withProperties: raw)
+        XCTAssertEqual(health["hasBattery"] as? Bool, true)
+        XCTAssertEqual(health["installed"] as? Bool, true)
+        XCTAssertEqual(health["healthCondition"] as? String, "Normal")
+        
+        let healthPercent = (health["healthPercent"] as? Double) ?? 0.0
+        XCTAssertEqual(healthPercent, 90.9, accuracy: 0.1)
+        XCTAssertEqual(health["cycleCount"] as? Int, 250)
+        XCTAssertEqual(health["designCycleCount"] as? Int, 1000)
+        XCTAssertEqual(health["temperature"] as? Double, 31.5)
+        let watts = (health["watts"] as? Double) ?? 0.0
+        XCTAssertEqual(watts, 16.7, accuracy: 0.2)
+        XCTAssertEqual(health["manufacturer"] as? String, "SMP")
+    }
+
+    func testCalculateBatteryHealthWithServiceRecommended() {
+        let raw: [String: Any] = [
+            "BatteryInstalled": true,
+            "CycleCount": 1100,
+            "DesignCycleCount9C": 1000,
+            "CurrentCapacity": 1500,
+            "MaxCapacity": 2500,
+            "DesignCapacity": 4400, // ~56.8% health
+            "Temperature": 3200,
+            "Voltage": 10800,
+            "Amperage": -1000,
+            "IsCharging": false,
+            "FullyCharged": false,
+            "ExternalConnected": false,
+            "TimeRemaining": 90,
+            "Manufacturer": "Apple"
+        ]
+
+        let health = MMBatteryTelemetryProvider.calculateBatteryHealth(withProperties: raw)
+        XCTAssertEqual(health["healthCondition"] as? String, "Service Recommended")
+        let healthPercent = (health["healthPercent"] as? Double) ?? 0.0
+        XCTAssertLessThan(healthPercent, 70.0)
+    }
+
+    func testCalculateBatteryHealthWithNil() {
+        let health = MMBatteryTelemetryProvider.calculateBatteryHealth(withProperties: nil)
+        XCTAssertEqual(health["hasBattery"] as? Bool, false)
+        XCTAssertEqual(health["installed"] as? Bool, false)
+        XCTAssertEqual(health["healthCondition"] as? String, "No Battery")
+    }
+
+    func testLiveSampleBattery() {
+        do {
+            let sample = try provider.sampleTelemetry()
+            XCTAssertNotNil(sample)
+            if provider.hasBattery {
+                XCTAssertEqual(sample["hasBattery"] as? Bool, true)
+                XCTAssertNotNil(sample["cycleCount"])
+                XCTAssertNotNil(sample["healthPercent"])
+                XCTAssertNotNil(sample["healthCondition"])
+            }
+        } catch {
+            XCTFail("sampleTelemetry threw error: \(error)")
+        }
+    }
+}

Tests/MMPeripheralsTests.swift

@@ -0,0 +1,73 @@
+//
+//  MMPeripheralsTests.swift
+//  MacMonitorTests
+//
+//  Unit and integration tests for MMPeripheralsProvider.
+//
+
+import XCTest
+@testable import MacMonitor
+
+final class MMPeripheralsTests: XCTestCase {
+    var provider: MMPeripheralsProvider!
+
+    override func setUp() {
+        super.setUp()
+        provider = MMPeripheralsProvider()
+    }
+
+    override func tearDown() {
+        provider = nil
+        super.tearDown()
+    }
+
+    func testDomainAndIdentifier() {
+        XCTAssertEqual(provider.domain, .peripherals)
+        XCTAssertEqual(provider.providerIdentifier, "com.i3omb.macmonitor.telemetry.peripherals")
+        XCTAssertTrue(provider.isAvailable)
+    }
+
+    func testSamplePeripheralsLive() {
+        do {
+            let sample = try provider.sampleTelemetry()
+            XCTAssertNotNil(sample)
+            
+            let total = sample["totalDeviceCount"] as? Int ?? 0
+            XCTAssertGreaterThan(total, 0, "Host system should have at least 1 PCI/USB device")
+            
+            let pci = sample["pciDevices"] as? [[String: Any]] ?? []
+            XCTAssertGreaterThan(pci.count, 0, "Intel Mac should have PCI devices (host bridge, GPU, etc.)")
+            
+            if let firstPCI = pci.first {
+                XCTAssertNotNil(firstPCI["name"])
+                XCTAssertEqual(firstPCI["busType"] as? String, "PCI")
+            }
+            
+            let usb = sample["usbDevices"] as? [[String: Any]] ?? []
+            for dev in usb {
+                XCTAssertEqual(dev["busType"] as? String, "USB")
+                XCTAssertNotNil(dev["name"])
+            }
+        } catch {
+            XCTFail("sampleTelemetry threw error: \(error)")
+        }
+    }
+
+    func testPeripheralDeviceModel() {
+        let dev = MMPeripheralDevice()
+        dev.name = "Magic Trackpad"
+        dev.busType = .USB
+        dev.vendorName = "Apple Inc."
+        dev.vendorID = 0x05ac
+        dev.productID = 0x0265
+        dev.isBuiltIn = false
+        
+        let dict = dev.toDictionary()
+        XCTAssertEqual(dict["name"] as? String, "Magic Trackpad")
+        XCTAssertEqual(dict["busType"] as? String, "USB")
+        XCTAssertEqual(dict["vendorName"] as? String, "Apple Inc.")
+        XCTAssertEqual(dict["vendorID"] as? UInt32, 0x05ac)
+        XCTAssertEqual(dict["productID"] as? UInt32, 0x0265)
+        XCTAssertEqual(dict["isBuiltIn"] as? Bool, false)
+    }
+}