Long service UUIDs vs short service UUIDshttps://devzone.nordicsemi.com/f/nordic-q-a/3153/long-service-uuids-vs-short-service-uuidsI&#39;m working with the nrf51-app-ble-lbs demo from github. I notice that when I&#39;m using BLE scanning apps, the VS service UUID is long (128 bits), whereas if I&#39;m looking at other BLE devices around the house, they&#39;re all short (16 bits). What causesen-USTelligent Community 13Thu, 17 Jul 2014 13:20:01 GMTRE: Long service UUIDs vs short service UUIDshttps://devzone.nordicsemi.com/thread/11651?ContentTypeID=1Thu, 17 Jul 2014 13:20:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:286ec0f4-0b38-436c-b571-0d0cdc74d66aDavid Edwin<p>You can also purchase a 16bit UUID from the Bluetooth SIG, if you are a Bluetooth SIG member in good standing. See <a href="https://www.bluetooth.org/en-us/specification/assigned-numbers/sdo-16-bit-uuids">www.bluetooth.org/.../sdo-16-bit-uuids</a></p><div style="clear:both;"></div>RE: Long service UUIDs vs short service UUIDshttps://devzone.nordicsemi.com/thread/11650?ContentTypeID=1Wed, 16 Jul 2014 23:22:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3ac00995-c42b-4590-80d7-31360de689beAndrew Kohlsmith<p>Thank you; I&#39;ve been over that doc a hundred times and I can&#39;t believe I missed that.</p><div style="clear:both;"></div>RE: Long service UUIDs vs short service UUIDshttps://devzone.nordicsemi.com/thread/11649?ContentTypeID=1Wed, 16 Jul 2014 23:00:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dd50338f-b751-4bea-8a29-a752ea9105aeLucas<p>Hello Andrew,</p> <p>I would suggest you look at page 9 of nAn-36. You can find it on the info page for the nrf51822 part. This document will go into a little detail about long vs short UUID&#39;s.</p> <p>Essentially, the long ones are used for custom services/characteristics and the short ones are for BLE SIG services/characteristics.</p> <p>There are disadvantages to it being longer. More data to transmit. Hard to fit the large one into advertisement packets.</p> <p>Lucas</p><div style="clear:both;"></div>