https://devzone.nordicsemi.com/f/nordic-q-a/6105/how-to-discovery-128bit-uuid-in-central-roleI referenced the question in this link devzone.nordicsemi.com/.../sd_ble_gattc_primary_services_discover . And I can see the Read by Group Type Request and response in sniffer. The UUIDs are in the response packet. But how can I distinguish the 128en-USTelligent Community 13Wed, 18 Mar 2015 13:58:24 GMThttps://devzone.nordicsemi.com/thread/21370?ContentTypeID=1Wed, 18 Mar 2015 13:58:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cdb3b282-2f7c-463f-98b3-2630beab5771endnode<p>Hi bihu,</p> <p>You will probably find the answer here: <a href="https://devzone.nordicsemi.com/question/15930/s130-custom-uuid-service-discovery/">devzone.nordicsemi.com/.../</a></p> <p>Cheers Jan</p><div style="clear:both;"></div>