Couldn't Discover Peripheral in Core Bluetooth

Question

I've iPhone app and I want to connect with bluetooth device to get Glucose Measurements. You can find the device from here.

After reading Apple documentation about Core Bluetooth I started reading these tutorial. Also I get the services ID's for bluetooth devices from these link here

So I started to code like in the tutorial after understanding the basics.

And these my Code:

#define POLARH7_HRM_DEVICE_INFO_SERVICE_UUID @"180A" // for Device Information service.
#define POLARH7_HRM_HEART_RATE_SERVICE_UUID @"1808" // For Glucose service.

NSArray *services = @[[CBUUID UUIDWithString:POLARH7_HRM_HEART_RATE_SERVICE_UUID], [CBUUID UUIDWithString:POLARH7_HRM_DEVICE_INFO_SERVICE_UUID]];
CBCentralManager *centralManager = [[CBCentralManager alloc] initWithDelegate:self queue:nil];
[centralManager scanForPeripheralsWithServices:services options:nil];
self.centralManager = centralManager;

And I've implemented the delegates for CBCentralManagerDelegate and CBPeripheralDelegate

I receive a notification for centralManagerDidUpdateState

- (void)centralManagerDidUpdateState:(CBCentralManager *)central
{
    // Determine the state of the peripheral
    if ([central state] == CBCentralManagerStatePoweredOff) {
        NSLog(@"CoreBluetooth BLE hardware is powered off");
    }
    else if ([central state] == CBCentralManagerStatePoweredOn) {
        NSLog(@"CoreBluetooth BLE hardware is powered on and ready");
    }
    else if ([central state] == CBCentralManagerStateUnauthorized) {
        NSLog(@"CoreBluetooth BLE state is unauthorized");
    }
    else if ([central state] == CBCentralManagerStateUnknown) {
        NSLog(@"CoreBluetooth BLE state is unknown");
    }
    else if ([central state] == CBCentralManagerStateUnsupported) {
        NSLog(@"CoreBluetooth BLE hardware is unsupported on this platform");
    }
}

My NSLog logs : CoreBluetooth BLE hardware is powered on and ready.

But I did not receive a notification for central didDiscoverPeripheral.

- (void)centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)peripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI
{
    NSString *localName = [advertisementData objectForKey:CBAdvertisementDataLocalNameKey];
    if ([localName length] > 0) {
        NSLog(@"Found the heart rate monitor: %@", localName);
        [self.centralManager stopScan];
        self.polarH7HRMPeripheral = peripheral;
        peripheral.delegate = self;
        [self.centralManager connectPeripheral:peripheral options:nil];
    }
}

These method is not being called.

So the central (my iPhone) couldn't discover the Peripheral which is my Glucose device.

I couldn't find the device when I search for it from Setting ->Bluetooth.

Answer 1

If centralManager:didDiscoverPeripheral:advertisementData:RSSI: is never called, this likely means that there is no peripheral with one of provided CBUUIDs. You could try to provide nil instead of the services-array and check if there is any peripheral available (don't do this in production mode).

Answer 2

OK, I think I figured out the problem after sending email to TaiDoc company they told me that these device dose not support iPhone bluetooth integration.

I tried to connect with Tom-Tom GPS watch and it's connected successfully :) So I think the problem of the issue is a Hardware issue.