https://devzone.nordicsemi.com/f/nordic-q-a/120244/is-it-possible-to-have-two-connections-between-two-devices-one-in-each-directionHi We have a product that uses a nRF5x Soc. Is acts as both a central and peripheral. The central part connects to a pulseoxymeter, and the peripheral part allows an app to connect. Works fine. But now we are creating some new test equipment, thaten-USTelligent Community 13Fri, 28 Mar 2025 14:52:01 GMThttps://devzone.nordicsemi.com/thread/529575?ContentTypeID=1Fri, 28 Mar 2025 14:52:01 GMT137ad170-7792-4731-bb38-c0d22fbe4515:954558e1-17a0-45be-b1cc-3768a43809dbJakob Ruhe<p>Hi Kasper,</p> <p>Great to hear that your product is working fine acting as a Central and a Peripheral at the same time! Bluetooth is indeed powerful and flexible.</p> <p>For two nodes to have two connections with eachother, is a very strange use case. Therefore, as it looks like when I look at the source code, Zephyr does not allow you to do that.</p> <p>You could perhaps spend time commenting out the relevant check in `conn_le_create_common_checks` in conn.c and see how far it gets you. But I think that is waste of time.&nbsp;</p> <p>I think it is a much better idea to just use two development kits, one acting as a pulseoxymeter and another acting as an app. Connect these two to the same computer and write some application in Python or whatever so that you can coordinate the testing.</p> <p>Good luck!</p><div style="clear:both;"></div>