https://devzone.nordicsemi.com/f/nordic-q-a/37250/swapping-client-and-server-roles-in-the-mtu-exampleI am developing a multi-link application where several Peripherals take turns transmitting real-time samples to a Central, generally about a 156 byte payload per transmission. A typical case would be 8 Server peripherals sending to 1 Client Central withen-USTelligent Community 13Wed, 08 Aug 2018 12:07:37 GMThttps://devzone.nordicsemi.com/thread/143355?ContentTypeID=1Wed, 08 Aug 2018 12:07:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8ad694c0-5cc6-4bb9-af84-d0432148f751Kenneth<p>Hello,</p> <p>There should be no dependency between GAP role and GATT configuration. The common scenario is that a peripheral device have the GATT server/database (e.g. a sensor) and the central device is a GATT client (e.g. mobile). However the GATT configuration can be swapped, or both peripheral and central may have a GATT server/database (and thereby also can be GATT clients). A device can always&nbsp;do a GATT database discovery of the peer device after connection to check what services the peer provide in their GATT database, this works independent of GAP role. I don&#39;t see any real problem here other than the time to put it all together, which of course is always time consuming.</p> <p>Best regards,<br />Kenneth</p><div style="clear:both;"></div>