how to identify the messages sent by two apps from same iOS devicehttps://devzone.nordicsemi.com/f/nordic-q-a/16229/how-to-identify-the-messages-sent-by-two-apps-from-same-ios-deviceIn iOS, it is possible for different apps to send data to the same characteristics in the same device by calling retrieveConnectedPeriphrals… Is there a way to identify the data sent by these apps from the GATT server/periphral side?en-USTelligent Community 13Wed, 07 Sep 2016 13:26:53 GMTRE: how to identify the messages sent by two apps from same iOS devicehttps://devzone.nordicsemi.com/thread/61990?ContentTypeID=1Wed, 07 Sep 2016 13:26:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:91032334-2ec1-4bbf-a746-db80926c471fHung Bui<p>Hi Holonono,</p> <p>I don&#39;t think there is a way the peripheral can detect if the BLE packets were sent by one app or the other. They both comes from same central device.</p> <p>What you can do is to set a flag in the data of the packet you send, a write command for example. You can set the first byte to 1 meaning it&#39;s the command from app A, set it to 2 meaning it&#39;s from app B.</p><div style="clear:both;"></div>