Question

i would like to know iphone 4s can connect two bluetooth 4.0 device?

i use Corebluetooth.framework to connect my bluetooth4.0 device, now i have question if we have two device can i connect both?

thank you very much!

Answer 1

Yes.

For an example, take a look at Apple’s heart rate monitor sample at http://developer.apple.com/library/mac/#samplecode/HeartRateMonitor/Introduction/Intro.html%23//apple_ref/doc/uid/DTS40011322. In HeartRateMonitorAppDelegate.m you will find the following method collecting multiple devices:

- (void) centralManager:(CBCentralManager *)central didDiscoverPeripheral:(CBPeripheral *)aPeripheral advertisementData:(NSDictionary *)advertisementData RSSI:(NSNumber *)RSSI 
{    
    NSMutableArray *peripherals = [self mutableArrayValueForKey:@"heartRateMonitors"];
    if( ![self.heartRateMonitors containsObject:aPeripheral] )
        [peripherals addObject:aPeripheral];

    /* Retreive already known devices */
    if(autoConnect)
    {
        [manager retrievePeripherals:[NSArray arrayWithObject:(id)aPeripheral.UUID]];
    }
}

In this particular sample, the app only connects with one of the heart rate monitors, but you can look at the code and easily see how it could connect to two, assuming you are willing to update the UI to show both heart rates.