https://devzone.nordicsemi.com/f/nordic-q-a/34845/custom-service-vs-uart-serviceHi All, A very general question here. I understand that using pre-defined services like the battery service help standardize the way peripherals send data to the central device. However, if I&#39;m designing a device with a proprietary command structureen-USTelligent Community 13Mon, 28 May 2018 18:15:56 GMThttps://devzone.nordicsemi.com/thread/133707?ContentTypeID=1Mon, 28 May 2018 18:15:56 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7a18869-9a65-4522-b9ff-134679a2cfa0Nguyen Hoan Hoang<p>none. &nbsp;UART service is a custom service with its own hardcoded uuid. &nbsp;If you want a better one, see this blog about <a href="http://embeddedsoftdev.blogspot.ca/2018/02/bluetooth-le-with-nordic-nrf51-nrf52.html">BLE custom service in a few lines of code</a>.&nbsp;</p><div style="clear:both;"></div>