356 lines
11 KiB
Objective-C
356 lines
11 KiB
Objective-C
#import "ble_delegate.h"
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@implementation ble_delegate
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- (ble_delegate*) init
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{
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[super init];
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NSLog(@"Initializing manager");
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q = dispatch_queue_create("st.wow.gitlab.ble",NULL);
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[q retain];
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manager = [[CBCentralManager alloc] initWithDelegate:self queue:q];
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return self;
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}
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- (void) dealloc
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{
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[self stopScan];
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[peripheral setDelegate:nil];
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[peripheral release];
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[manager release];
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[super dealloc];
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}
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#pragma mark - Start/Stop Scan methods
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/*
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Request CBCentralManager to scan for heart rate peripherals using service UUID 0x180D
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*/
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- (void) scanFor:(CBUUID*)uuid
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{
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autoConnect = TRUE;
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[self _scanFor:uuid];
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}
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- (void) _scanFor:(CBUUID*)uuid
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{
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if (uuid != nil) {
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if (looking_for != nil) {
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[looking_for release];
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}
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looking_for = uuid;
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}
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if (looking_for == nil) {
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NSLog(@"No scan target specified");
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return;
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}
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if (![self isLECapableHardware]) {
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NSLog(@"Not LE capable hardware");
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NSLog(@"Setting wantScan to true");
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wantScan = true;
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return;
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} else {
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NSLog(@"Is LE capable hardware");
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}
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NSLog(@"Scanning");
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[manager scanForPeripheralsWithServices:[NSArray arrayWithObject:looking_for] options:nil];
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}
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/*
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Request CBCentralManager to stop scanning for heart rate peripherals
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*/
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- (void) stopScan
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{
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[manager stopScan];
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}
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#pragma mark - CBCentralManager delegate methods
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/*
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Invoked whenever the central manager's state is updated.
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*/
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- (void) centralManagerDidUpdateState:(CBCentralManager *)central
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{
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NSLog(@"State changed");
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if ([self isLECapableHardware] && wantScan) {
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NSLog(@"Starting scan?");
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[self _scanFor:nil];
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}
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}
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- (BOOL) isLECapableHardware
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{
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NSString * state = nil;
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switch ([manager state])
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{
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case CBManagerStateUnsupported:
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NSLog(@"--unsupported");
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state = @"The platform/hardware doesn't support Bluetooth Low Energy.";
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break;
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case CBManagerStateUnauthorized:
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NSLog(@"--unauthorized");
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state = @"The app is not authorized to use Bluetooth Low Energy.";
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break;
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case CBManagerStatePoweredOff:
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NSLog(@"--powered off");
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state = @"Bluetooth is currently powered off.";
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break;
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case CBManagerStatePoweredOn:
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NSLog(@"--powered on");
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return TRUE;
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case CBManagerStateResetting:
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NSLog(@"--resetting");
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return FALSE;
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case CBManagerStateUnknown:
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NSLog(@"--unknown");
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state = @"Bluetooth state is unknown.";
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}
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NSLog(@"Central manager state: %@", state);
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return FALSE;
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}
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/*
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Invoked when the central discovers a peripheral while scanning.
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*/
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- (void) centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)aPeripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
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{
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NSLog(@"Found peripheral");
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peripheral = aPeripheral;
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[peripheral retain];
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if (autoConnect) {
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[self stopScan];
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printf("Connecting\n");
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[manager connectPeripheral:aPeripheral options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];
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}
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}
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/*
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Invoked when the central manager retrieves the list of known peripherals.
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Automatically connect to first known peripheral
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*/
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- (void)centralManager:(CBCentralManager *)central didRetrievePeripherals:(NSArray *)peripherals
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{
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NSLog(@"Retrieved peripheral: %lu - %@", [peripherals count], peripherals);
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[self stopScan];
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/* If there are any known devices, automatically connect to it.*/
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if([peripherals count] >=1)
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{
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peripheral = [peripherals objectAtIndex:0];
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[peripheral retain];
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printf("Connecting\n");
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[manager connectPeripheral:peripheral options:[NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:CBConnectPeripheralOptionNotifyOnDisconnectionKey]];
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}
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}
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/*
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Invoked whenever a connection is succesfully created with the peripheral.
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Discover available services on the peripheral
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*/
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- (void) centralManager:(CBCentralManager *)central didConnectPeripheral:(CBPeripheral *)aPeripheral
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{
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NSLog(@"Connected");
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[aPeripheral setDelegate:self];
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[aPeripheral discoverServices:nil];
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}
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/*
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Invoked whenever an existing connection with the peripheral is torn down.
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Reset local variables
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*/
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- (void)centralManager:(CBCentralManager *)central didDisconnectPeripheral:(CBPeripheral *)aPeripheral error:(NSError *)error
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{
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if( peripheral )
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{
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[peripheral setDelegate:nil];
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[peripheral release];
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peripheral = nil;
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}
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}
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/*
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Invoked whenever the central manager fails to create a connection with the peripheral.
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*/
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- (void)centralManager:(CBCentralManager *)central didFailToConnectPeripheral:(CBPeripheral *)aPeripheral error:(NSError *)error
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{
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NSLog(@"Fail to connect to peripheral: %@ with error = %@", aPeripheral, [error localizedDescription]);
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if( peripheral )
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{
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[peripheral setDelegate:nil];
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[peripheral release];
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peripheral = nil;
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}
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}
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#pragma mark - CBPeripheral delegate methods
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/*
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Invoked upon completion of a -[discoverServices:] request.
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Discover available characteristics on interested services
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*/
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- (void) peripheral:(CBPeripheral *)aPeripheral didDiscoverServices:(NSError *)error
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{
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NSLog(@"Discovered services");
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for (CBService *aService in aPeripheral.services)
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{
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NSLog(@"Service found with UUID: %@", aService.UUID);
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/* Heart Rate Service */
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if ([aService.UUID isEqual:[CBUUID UUIDWithString:@"180D"]])
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{
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NSLog(@"--heart rate service");
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[aPeripheral discoverCharacteristics:nil forService:aService];
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}
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/* Device Information Service */
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if ([aService.UUID isEqual:[CBUUID UUIDWithString:@"180A"]])
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{
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NSLog(@"--device information service");
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[aPeripheral discoverCharacteristics:nil forService:aService];
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}
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/* GAP (Generic Access Profile) for Device Name */
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if ( [aService.UUID isEqual:[CBUUID UUIDWithString:@"1800"]] )
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{
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NSLog(@"--generic access profile");
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[aPeripheral discoverCharacteristics:nil forService:aService];
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}
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}
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}
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/*
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Invoked upon completion of a -[discoverCharacteristics:forService:] request.
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Perform appropriate operations on interested characteristics
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*/
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- (void) peripheral:(CBPeripheral *)aPeripheral didDiscoverCharacteristicsForService:(CBService *)service error:(NSError *)error
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{
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NSLog(@"Discovered characteristics");
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if ([service.UUID isEqual:[CBUUID UUIDWithString:@"180D"]])
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{
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for (CBCharacteristic *aChar in service.characteristics)
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{
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/* Set notification on heart rate measurement */
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if ([aChar.UUID isEqual:[CBUUID UUIDWithString:@"2A37"]])
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{
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[peripheral setNotifyValue:YES forCharacteristic:aChar];
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NSLog(@"Found a Heart Rate Measurement Characteristic");
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}
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/* Read body sensor location */
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if ([aChar.UUID isEqual:[CBUUID UUIDWithString:@"2A38"]])
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{
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[aPeripheral readValueForCharacteristic:aChar];
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NSLog(@"Found a Body Sensor Location Characteristic");
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}
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/* Write heart rate control point */
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if ([aChar.UUID isEqual:[CBUUID UUIDWithString:@"2A39"]])
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{
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uint8_t val = 1;
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NSData* valData = [NSData dataWithBytes:(void*)&val length:sizeof(val)];
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[aPeripheral writeValue:valData forCharacteristic:aChar type:CBCharacteristicWriteWithResponse];
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}
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}
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}
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if ( [service.UUID isEqual:[CBUUID UUIDWithString:@"1800"]] )
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{
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for (CBCharacteristic *aChar in service.characteristics)
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{
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/* Read device name */
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if ([aChar.UUID isEqual:[CBUUID UUIDWithString:@"2A00"]])
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{
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[aPeripheral readValueForCharacteristic:aChar];
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NSLog(@"Found a Device Name Characteristic");
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}
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}
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}
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if ([service.UUID isEqual:[CBUUID UUIDWithString:@"180A"]])
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{
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for (CBCharacteristic *aChar in service.characteristics)
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{
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/* Read manufacturer name */
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if ([aChar.UUID isEqual:[CBUUID UUIDWithString:@"2A29"]])
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{
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[aPeripheral readValueForCharacteristic:aChar];
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NSLog(@"Found a Device Manufacturer Name Characteristic");
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}
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}
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}
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}
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/*
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Invoked upon completion of a -[readValueForCharacteristic:] request or on the reception of a notification/indication.
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*/
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- (void) peripheral:(CBPeripheral *)aPeripheral didUpdateValueForCharacteristic:(CBCharacteristic *)characteristic error:(NSError *)error
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{
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NSLog(@"didUpdateValueForCharacteristic");
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/* Updated value for heart rate measurement received */
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if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"2A37"]])
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{
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if( (characteristic.value) || !error )
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{
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/* Update UI with heart rate data */
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//[self updateWithHRMData:characteristic.value];
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}
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}
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/* Value for body sensor location received */
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else if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"2A38"]])
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{
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NSData * updatedValue = characteristic.value;
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uint8_t* dataPointer = (uint8_t*)[updatedValue bytes];
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if(dataPointer)
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{
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uint8_t location = dataPointer[0];
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NSString* locationString;
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switch (location)
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{
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case 0:
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locationString = @"Other";
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break;
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case 1:
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locationString = @"Chest";
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break;
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case 2:
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locationString = @"Wrist";
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break;
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case 3:
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locationString = @"Finger";
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break;
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case 4:
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locationString = @"Hand";
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break;
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case 5:
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locationString = @"Ear Lobe";
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break;
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case 6:
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locationString = @"Foot";
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break;
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default:
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locationString = @"Reserved";
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break;
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}
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NSLog(@"Body Sensor Location = %@ (%d)", locationString, location);
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}
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}
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/* Value for device Name received */
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else if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"2A00"]])
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{
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NSString * deviceName = [[[NSString alloc] initWithData:characteristic.value encoding:NSUTF8StringEncoding] autorelease];
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NSLog(@"Device Name = %@", deviceName);
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}
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/* Value for manufacturer name received */
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else if ([characteristic.UUID isEqual:[CBUUID UUIDWithString:@"2A29"]])
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{
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NSString * manufacturer = [[[NSString alloc] initWithData:characteristic.value encoding:NSUTF8StringEncoding] autorelease];
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NSLog(@"Manufacturer Name = %@", manufacturer);
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}
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}
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@end
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