https://devzone.nordicsemi.com/f/nordic-q-a/86222/esb-over-hciIs it possible to use ESB over the Bluetooth HCI from the controller, or through its own HCI? Preferably using Zephyr? If not, how hard would it be to implement? I am fine with using Gazell as well. What would also work is a NCP like how Zigbee hasen-USTelligent Community 13Fri, 25 Mar 2022 08:10:07 GMThttps://devzone.nordicsemi.com/thread/359921?ContentTypeID=1Fri, 25 Mar 2022 08:10:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:55127898-3ca3-4ba9-9376-7ecb41c17447ketiljo<p>No, that&#39;s not possible, ESB is a proprietary Nordic &quot;protocol&quot; operating on one frequency only. You need another layer on top of ESB for a proper protocol. Gazell is such a protocol. HCI is a Bluetooth specific interface.&nbsp;</p><div style="clear:both;"></div>