Mesh Networking Specifications Close. I assume you have at least some elementary knowledge of how Bluetooth Low Energy works. It is responsible for creating a connection, which will continue on a different channel. Class 1: Notify me of follow-up comments by email. It is used by the slave device to acknowledge the received packet or request resending the last Data Channel PDU sent. Each operation has an associated callback. To simplify the article, I did not handle edge cases such as checking return values, enabling the Bluetooth if it is not enabled yet, etc.
The last two years we have done many BLE-enabled apps for our customers and here are a couple of things we learned. If you think the peripheral might be buggy try to use an iOS device to counter-check. BLE on Android 4. On Android 4. BLE on Android 6. Also the new scanner introduced in 5. So there is hope: Now on to the specifics. You may call BluetoothGatt readCharacteristic and immediately after that do another read. You might expect that there is a queue and that eventually you will receive two callbacks one for each read.
You always have to Gta v raumschiffteile for one GATT operation to finish before you can start another one.
Otherwise the result is undefined. Use a state Bluetooth low energy android - it will save you a lot of trouble. Always make sure your connections are closed if no longer needed. Use BluetoothGatt close for that. Otherwise your app might work some time but after reaching a device specific connection limit stuff will get flaky. Same as above: Even with Android 5. So filter manually and later carefully optimize on real devices.
To be on the save side only write chunks of 20 Bytes. Again use a state machine for that. Do all calls to the BLE stack on the main thread or you might get unexpected behavior. If you have other tips, please leave them inside the comments.