https://devzone.nordicsemi.com/f/nordic-q-a/23290/what-is-serviceuuid-and-charactersiticuuidi&#39;m using ionic2 framework with BLE plugin to connect nordicsemi devices. i can scan and see the list of devices and also connect to the device , but for reading and writing on device i need serviceUUID and characteristicUUID , below is the signatureen-USTelligent Community 13Thu, 06 Jul 2017 09:25:21 GMThttps://devzone.nordicsemi.com/thread/91566?ContentTypeID=1Thu, 06 Jul 2017 09:25:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:99123988-04a6-4281-86ad-d51c835fdc2abjorn-spockeli<p>I am not familiar with the Iconic2 framework, but UUID( Universally Unique ID) is a unique number used to identify services, characteristics and descriptors. We have tutorials on both BLE Services and Characteristics that explain the purpose of the UUID and how its used, I have attached the links to the tutorials below.</p> <blockquote> <p><a href="https://devzone.nordicsemi.com/tutorials/8">Bluetooth low energy Services, a beginner&#39;s tutorial</a></p> <p><a href="https://devzone.nordicsemi.com/tutorials/17">Bluetooth low energy Characteristics, a beginner&#39;s tutorial</a></p> </blockquote> <p>Bjørn</p><div style="clear:both;"></div>