https://devzone.nordicsemi.com/f/nordic-q-a/5949/custom-services-and-advertisingTake into account an application on the nRF51822 and S110. I have defined different custom services, so UUID is 128bit long. When advertising: Is it advisable to include all services? If yes, how can be managed taking into account the 31 bytesen-USTelligent Community 13Tue, 10 Mar 2015 10:12:50 GMThttps://devzone.nordicsemi.com/thread/20716?ContentTypeID=1Tue, 10 Mar 2015 10:12:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef911893-6c1a-47c0-83bb-22701d368ba9Hung Bui<p>@Dani: Yes you have to take into account the limit of 31 bytes limit. The 128 bit UUID is already 16 bytes and you also have to use some bytes for flags, header, lengths etc. You have 2 seoarate packets advertising packet and scan response packet, each 31 bytes. uuids_more_available telling beside the list of UUID in the data field, there are more uuid in the attribute table. My suggestion is to add only most important 128 bit UUID into your advertising/scan response packet. The central can connect and do a service discovery when needed.</p><div style="clear:both;"></div>