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POHow to connect Android device to an iOS device over BLE (Bluetooth Low Energy)
 

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  1. POHow to connect Android device to an iOS device over BLE (Bluetooth Low Energy)
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    <p>I'm trying to make an application which uses the <strong>new Bluetooth Low Energy API</strong> of Android. For this, I started with the BLE sample coming with <strong>API level 18</strong>. </p> <p>As I read that Android can not act as a Peripheral, I put the Android phone in central mode, scanning for <strong>BLE devices</strong> around it. For this purpose, I made some testing with a Nordic Platform simulating a Heart Sensor. Everything works in a perfect way!</p> <p>After this, I try to pick an <strong>iPhone (iOS 7 beta 4)</strong> and put it in a Peripheral way and simulating a <strong>Heart Rate sensor</strong> as the previous testing. The Android app is able to see the device and connect to it. But after the connection is active, the 2 devices disconnect from each other in 3-4 seconds. In addition to that, when I call discoverServices() on Android side, no callback is triggered! In some cases the Android device receives the "Connected" event even if iOS Bluetooth chip is Off. This is very strange. To prove that, I put the <strong>Nordic Board in Central mode</strong> and I was correctly able to connect to the iOS device with no problems. </p> <p>What could it be? There are some limitations on Android or iOS that don't permit to connect from an Android to an iOS or viceversa?</p> <p>Thanks.</p> <p>EDIT: After some hard testing, I raised an issue on the AOSP page. It can be checked <a href="https://code.google.com/p/android/issues/detail?can=2&amp;start=0&amp;num=100&amp;q=&amp;colspec=ID%20Type%20Status%20Owner%20Summary%20Stars&amp;groupby=&amp;sort=&amp;id=58725">here</a></p>
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    1. USPedro Lobito
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    1. COAccording to the documentation, Android DOES support running as a server (for example a Heart Rate monitor) though the values one generates will be fake. On the other hand, there are no examples, the documentation tells you to do wrong things, and there is no way to start advertisements (though the documentation says you can).
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      1. POHow to connect Android device to an iOS device over BLE (Bluetooth Low Energy)
      1. USBrian Reinhold
    2. COYou're right. I've already found the doc bug about BluetoothGattServer. You can not have the GattServer instance with getProfileProxy method (as doc says), but you can from the BluetoothManager.openGattServer(). It's already been reported to google as an issue. Anyway, yes Android can act as a GattServer but it can not advertise. If you might be interested, I've already tested and after the conenction of the 2 devices, the remote can see the Gatt servers exposed from Android. Check first answer's comments to see my issue report about this question.
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    3. COYea, I stumbled on that too and added my two cents to that issue. Now I have a Thermometer server that can't advertise so I can't use it.
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      1. POHow to connect Android device to an iOS device over BLE (Bluetooth Low Energy)
      1. USBrian Reinhold
 

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