https://devzone.nordicsemi.com/f/nordic-q-a/18044/sending-data-from-adc-over-ble-to-android-application-and-integrating-with-other-dataHello, I have platform base on nrf51822, collecting data through I2C and sending to android application. the device is working according following protocol: Motion data is sent twenty times per second and ambient data once per second. Motion dataen-USTelligent Community 13Wed, 30 Nov 2016 15:26:46 GMThttps://devzone.nordicsemi.com/thread/69554?ContentTypeID=1Wed, 30 Nov 2016 15:26:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3e4228d9-b669-49e2-90b6-096dacda949eHung Bui<p>@Mostafa : You need to understand how things work, how you can send data from the device to the phone. Then you describe your challenge/issue you face. I mentioned, you can follow our tutorial and the example in the SDK.</p> <p>It&#39;s not possible to help you without you knowing how things work.</p> <p>Try to answer these questions:</p> <ul> <li> <p>How do you send 1 byte from your device to the phone ?</p> </li> <li> <p>What is the app on the phone you are using ?</p> </li> <li> <p>How often do you send data from your device to the phone ?</p> </li> <li> <p>How do you organize the attribute table ? How many characteristic, which do what ?</p> </li> </ul><div style="clear:both;"></div>