https://devzone.nordicsemi.com/f/nordic-q-a/118648/esb-ack-not-receivedHi, I&#39;m using nrf52840DK. I set the selective_auto_ack as true. It should be able to adopt dynamic ack (or ack payload). I have two data packets, which are ch_pkt and sync_pkt. Both are using .noack=true. And what I trying to do is to change sync_pkten-USTelligent Community 13Sun, 09 Feb 2025 16:18:24 GMThttps://devzone.nordicsemi.com/thread/522108?ContentTypeID=1Sun, 09 Feb 2025 16:18:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c5f08148-ff7a-4797-acba-5894057d2c9cHsin<p>Thank you!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/521834?ContentTypeID=1Fri, 07 Feb 2025 00:10:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:369ab0a4-0b3d-4036-9af3-002e04a0de00Sigurd<p>Are you calling&nbsp;<span>nrf_esb_write_payload() on the PRX ?</span></p> <p><span>If you are new to ESB, see this guide:&nbsp;<a href="https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/esb_users_guide.html">https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/esb_users_guide.html</a></span></p> <p><span></span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/521568?ContentTypeID=1Wed, 05 Feb 2025 14:16:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c46b4370-33f2-4b5c-8ffc-b477aa47e4a9Hsin<p>SDK 17.0.2</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/521553?ContentTypeID=1Wed, 05 Feb 2025 13:37:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a4373ee4-e99d-4c8f-b0d0-0d604de3bf9fSigurd<p>Hi!</p> <p>What SDK and SDK version are you using ?</p><div style="clear:both;"></div>