ESB ack not received

[Hsin]

Hi, I'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_pkt into .noack=false. I also need to add payload in ack.

However, once I set up .noack=false. PRX can only receive two sync_pkt. Not to mention whether TX received the ACK payload.

Do I miss something or ...? Tks a lot for helping.

[Sigurd]

Hi!

What SDK and SDK version are you using ?

[Hsin]

SDK 17.0.2

[Sigurd]

Are you calling nrf_esb_write_payload() on the PRX ?

If you are new to ESB, see this guide: https://docs.nordicsemi.com/bundle/sdk_nrf5_v17.1.0/page/esb_users_guide.html

[Hsin]

Thank you!