nRF52832 ESB TX is disturbed when sending data

RE: nRF52832 ESB TX is disturbed when sending data

Sigurd — Thu, 04 May 2023 12:05:20 GMT

Hi,

As mentioned, try to use different retransmit delays on the different PTX's (for instance 600us on one and 900us on another).

By default, this is set to 600 in our examples.

RE: nRF52832 ESB TX is disturbed when sending data

Lurn_Z — Thu, 04 May 2023 02:35:46 GMT

Hi Sigurd,

Cause I need real-time data, so I want to use the following method to solve my problem.

In my two PTX, I used vTaskDelayUntil(&lasttick, delay_count); in thread loop to make sure the the sending interval is the same 2MS, When I received the data in PRX, I would compare the interval between the two data(The data header can distinguish two different PTX). If the time % 2 == 0, it may cause data conflict. so I will change the delay_count to 3MS for one loop then change it back.

I think this method should be of some help, but if didn't work.

Can you give me some suggestions?

Best regards,

Lurn

RE: nRF52832 ESB TX is disturbed when sending data

Lurn_Z — Thu, 13 Apr 2023 08:04:35 GMT

Hi,

I can't guarantee that it will be sent at the same time, because it is determined by another device.

Each of the two of them sends a frame rate of 500, that is to say, send data once in 2ms(packet size is 32 byte).

And I think PRX has enough time to receive them.

About the retransmit, Sometimes I need real-time data, at that time maybe I will not to retrans it. But I will try it.

Best regards,

Lurn

RE: nRF52832 ESB TX is disturbed when sending data

Sigurd — Wed, 12 Apr 2023 12:35:48 GMT

Hi,

[quote user=""]But when I use two PTX to send data at the same time[/quote]

So the two PTX's are sending at the same time, and not sufficient apart in time for the PRX to be able to receive both of them ?

If there is a collision between the two on air the most likely both packets will be lost.

Normally this issue is handled by using a retransmit counter > 0, and ensure that you use different retransmit delays on the different PTX's (for instance 600us on one and 900us on another).

Then the two PTX's will retransmit their packet at different points in time, in the case of a collision.

RE: nRF52832 ESB TX is disturbed when sending data

Lurn_Z — Tue, 04 Apr 2023 03:28:49 GMT

Do you have any good suggestions?