ESB RX answer Ack to TX when TX periodical send data

RE: ESB RX answer Ack to TX when TX periodical send data

MinhDuc — Fri, 20 Oct 2023 05:10:17 GMT

Thank you for all you suggestions!

RE: ESB RX answer Ack to TX when TX periodical send data

Sigurd — Thu, 19 Oct 2023 22:07:41 GMT

[quote user="MinhDuc"]Can you explain to me why noack = true affects the way PRX answer to PTX? As I understand, only PTX decide to expect ack from PRX or not. [/quote]

When the PRX receives a packet that does not require an ACK, it does not send an ACK packet to the PTX

[quote user="MinhDuc"]And one more small question. If I connect external antenna to nrf52840-dk, SWF connector will automatically disconnect the signal from PCB antenna. Am I right? [/quote]

Correct.

[quote user="MinhDuc"]How can I be sure that PTX always send the next packet even if PRX doesn't answer the packet with noack = false?[/quote]

You can set the desired retransmit count with the function nrf_esb_set_retransmit_count(). Try setting it to 0, if you don't want retransmit.

RE: ESB RX answer Ack to TX when TX periodical send data

MinhDuc — Thu, 19 Oct 2023 00:53:18 GMT

Hello Sigurd,

Just want to update.

I successfully set the tx_payload.noack state for Tx. 250 packet noack = true then 6 noack = false then ...

My current problem is "sometimes, PTX can not get the answer from PRX at packet with noack = false. Then my system stop"

How can I be sure that PTX always send the next packet even if PRX doesn't answer the packet with noack = false?

Bests,

RE: ESB RX answer Ack to TX when TX periodical send data

MinhDuc — Wed, 18 Oct 2023 08:59:13 GMT

Hello Sigurd,

Thanks for your reply.

In PRX side, I set the selective_auto_ack = true and noack = true then it works.

Can you explain to me why noack = true affects the way PRX answer to PTX? As I understand, only PTX decide to expect ack from PRX or not.

And one more small question. If I connect external antenna to nrf52840-dk, SWF connector will automatically disconnect the signal from PCB antenna. Am I right?

Bests,

RE: ESB RX answer Ack to TX when TX periodical send data

Sigurd — Wed, 18 Oct 2023 08:39:29 GMT

Hi!

[quote user="MinhDuc"]Update: I solve my problem.[/quote]

Great!

[quote user="MinhDuc"]But I am not success with this target. [/quote]

What is not working? Never acked or always acked?

[quote user="MinhDuc"]PRX set up: selective_auto_ack = false; [/quote]

If I recall correctly, if you set setting selective_auto_ack=false, then noack is ignored, and all packets are acked.

RE: ESB RX answer Ack to TX when TX periodical send data

MinhDuc — Mon, 16 Oct 2023 07:07:51 GMT

Update: I solve my problem.

Another question I hope I can get the suggestion here.

Most of the time, I want to send data without ack ( tx_payload.noack = true).

So I code like this

uint8_t count;

while (true)

{

count++

if (count > 250) {tx_payload.noack = false}

else {tx_payload.noack = true}

}

By this way I always can send ack to Tx in some packet.

As I understand, In PRX side, I just write tx_payload.data to buffer then driver wait until the next Rx packet with ack expectation to send it back to PTX side. Am I right?

PTX set up: selective_auto_ack = true;

PRX set up: selective_auto_ack = false;

But I am not success with this target.

Please suggest the solution.

Bests,