https://devzone.nordicsemi.com/f/nordic-q-a/2438/nrf51822-how-ios7-apps-can-transmit-receive-binray-dataHi In ble uart project, the data is used string format. Now, we want to modify uart apps to tx/rx binary format. Could you tell us how to modify the uart apps? Thanks. Jefferyen-USTelligent Community 13Mon, 05 May 2014 14:01:25 GMThttps://devzone.nordicsemi.com/thread/9871?ContentTypeID=1Mon, 05 May 2014 14:01:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4914de70-329d-471a-a53e-df5fe3c07e9akk<p>HI,Jeffery</p> <p>Actually, there are no saying about what kind of data you send to/from app, because all data transmit in BLE are in form of byte. Which means: if you want to send a uint16_t data, you actually just send 2 bytes to app. And the string is just the same.</p> <p>I suggest you to refer the app example &quot;Sensor Tag&quot; created by TI company, which sends data in form of byte, and then you can find the difference between those two example and find out where to modify your code.</p><div style="clear:both;"></div>