https://devzone.nordicsemi.com/f/nordic-q-a/25865/2-4-ghz-based-proprietary-protocol-without-ack-in-link-levelHello, For BLE, there is always an ACK in link level no matter it&#39;s write/read/notify/indicate. How about 2.4G proprietary mode? Is it possible to just send a data without ACK in link level? We want to implement real-time voice application, and donen-USTelligent Community 13Thu, 12 Oct 2017 20:45:39 GMThttps://devzone.nordicsemi.com/thread/101881?ContentTypeID=1Thu, 12 Oct 2017 20:45:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8f87844d-60d5-4059-8bac-f135eeb01495Mich<p>Thanks, I got it!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/101880?ContentTypeID=1Thu, 12 Oct 2017 11:10:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bd91a452-64e0-4be4-bb29-3c0e3f70ca8dHung Bui<p>Hi Mich,</p> <p>If you have control over both sides of the communication and don&#39;t need to do BLE, you can use proprietary 2.4GHz. You can have a look at our <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v14.0.0/esb_users_guide.html?cp=4_0_0_5_0">Enhanced Shock Burst protocol</a>, where you can choose if you want ACK and retransmission or not. Examples are included in the SDK.</p><div style="clear:both;"></div>