https://devzone.nordicsemi.com/f/nordic-q-a/109726/how-to-create-16-bit-uuids-for-gatt-servers-and-characteristics-using-nrf-connect-sdkHi Team, I want to create 2 UUIDs for 2 GATT Servers I am using 128-bit UUIDs for creating but using 128-bit UUIDs I can&#39;t create more servers its showing error (too big advertisement err -22) So I decided to create 16-bit UUIDs please help Thank youen-USTelligent Community 13Tue, 02 Apr 2024 09:23:07 GMThttps://devzone.nordicsemi.com/thread/476493?ContentTypeID=1Tue, 02 Apr 2024 09:23:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3635a0c2-6e14-48a4-b0f5-51ce70d32bbbovrebekk<p>Hi&nbsp;</p> <p>Are you trying to advertise both the 128-bit UUID&#39;s?&nbsp;</p> <p>The advertise packet is limited to 31 bytes only, and this only leaves room for a single 128-bit UUID. In total a single 128-bit UUID will occupy 18 bytes in the advertise packet (16 bytes for the UUID and 2 bytes for the advertise field header).&nbsp;</p> <p>If you split the two UUID&#39;s between the advertise and scan response packets you should be able to fit both, but it will limit how much other data you are able to include in the advertisement.&nbsp;</p> <p>Best regards<br />Torbjørn</p><div style="clear:both;"></div>