RE: What is the procedure for gathering bluetooth ble Gatt attributes and enable Indications in Android project?

Christopher — Mon, 23 May 2016 17:41:22 GMT

Have a look at the sample Android project given by Nordic. This is a sample project you can open in Android Studio. The latest version is available on Github.

The library adds a BLE request queue to do any basic ATT read/write commands. Depending on the number of requests you want to send, you will need this queue to be sure that the BLE stack is not busy when queuing commands.

Have a look at the enableNotifications function to see how you can write (request) to the CCCD handle, checking the permissions of the characteristic, etc.: github.com/.../BleManager.java

RE: What is the procedure for gathering bluetooth ble Gatt attributes and enable Indications in Android project?

Stian Røed Hafskjold — Mon, 23 May 2016 14:21:01 GMT

To enable notifications/indications you issue a regular Write Request from the central and write to the CCCD handle in the corresponding characteristic.

You can find the source code for some of our mobile apps here: www.nordicsemi.com/.../Nordic-mobile-Apps

The nRF UART application uses notifications to receive data. They are very similar to indications, just that notifications do not need to be acked by the receiver.