About ESB sending failure...

RE: About ESB sending failure...

ovrebekk — Mon, 26 Aug 2019 12:17:47 GMT

I am happy to help. If you have more questions just let me know 🙂

RE: About ESB sending failure...

tony55723 — Mon, 26 Aug 2019 07:25:03 GMT

OK, I will be try it

Thank you so mush, you helped me a lot

RE: About ESB sending failure...

ovrebekk — Fri, 23 Aug 2019 07:12:19 GMT

ACK means that the PRX will send an ACK packet in response to every packet sent from the PTX.

This is the default behavior when using the ESB_DPL mode, and if you want to be able to disable the ACK it is important to set the selective_auto_ack parameter to true.

Disabling ACK will increase the throughput, yes, but you will not be able to retransmit lost packet, and you will not know how many of the packets reach the receiver.
In other words this is not a good choice if you need a reliable stream of data.

If you only have two chips in your network, are you sure you need to switch back and forth between PTX and PRX?

Normally in this scenario you would use ACK payloads to send data from the PRX to the PTX.

Still, if you want to switch you can have a look at a small broadcaster example I made a while back that will switch between modes for every packet.

How to switch from PRX to PTX mode is done here, and the opposite is handled here.

Best regards
Torbjørn

RE: About ESB sending failure...

tony55723 — Thu, 22 Aug 2019 07:39:44 GMT

Hi,

Thank you for your reply.

I am sorry, I forgot to change the function of the PA chip, it should be the state of the PA off,

equivalent to no ESB slave around.

It's run successfully now

I want to ask another question.

Should ack be the answer mode?

Can turning off ack increase the throughput?

last question

I will switch between these two states frequently.

nrf_esb_config.mode = NRF_ESB_MODE_PTX;

nrf_esb_config.mode = NRF_ESB_MODE_PRX;

If I have finished initializing, Next time I want to switch, is it necessary to do some clear?(Ensure that the next initialization is normal)

Or, I set the mode directly, and then initialize it directly?

nrf_esb_init(&nrf_esb_config);

Thank you.

RE: About ESB sending failure...

ovrebekk — Thu, 22 Aug 2019 06:41:00 GMT

Are you using ACK, or sending packets with the noack feature set?

If so it sounds normal that you should get the TX FAILED interrupt when there is no slave around.

Is the data transmission working properly when you have a slave nearby?

Best regards
Torbjørn