How does BLE + ESB receive?

RE: How does BLE + ESB receive?

Kenneth — Thu, 28 Apr 2022 08:14:47 GMT

Hi,

I suggest to get an PPK II, then you can see in real-time based on the current consumption when it's in rx, tx, idle, and switching. This will make it much easier to see how your changes affect timing etc.

Best regards,
Kenneth

RE: How does BLE + ESB receive?

eric_cheng — Thu, 28 Apr 2022 03:41:02 GMT

I don't quite understand the specific effect...

But I turned them all off

nrf_esb_config.selective_auto_ack = true;
rx_payload.noack = true;

=========================

I describe my current approach

Can you correct me if I'm doing something wrong?

I used Timer1 to switch TX and RX In 《timer_event_handler》

state = !state;

if(state == true) 
	{		
		//memcpy(&nrf_esb_config, &tmp_config, sizeof(nrf_esb_config_t));
		nrf_esb_config.payload_length     = 2; 
		nrf_esb_config.protocol           = NRF_ESB_PROTOCOL_ESB_DPL;
		nrf_esb_config.retransmit_delay   = 1000;
		nrf_esb_config.bitrate            = NRF_ESB_BITRATE_2MBPS;
		nrf_esb_config.event_handler      = nrf_esb_event_handler;
		nrf_esb_config.mode               = NRF_ESB_MODE_PTX;
		nrf_esb_config.tx_output_power		= NRF_ESB_TX_POWER_4DBM;
		nrf_esb_config.selective_auto_ack = true;
		nrf_esb_config.radio_irq_priority = 0; 
	}
	else
	{
		//memcpy(&nrf_esb_config, &tmp_config, sizeof(nrf_esb_config_t)); 
		nrf_esb_config.payload_length     = 8;
		nrf_esb_config.protocol           = NRF_ESB_PROTOCOL_ESB_DPL;
		nrf_esb_config.bitrate            = NRF_ESB_BITRATE_2MBPS;
		nrf_esb_config.mode               = NRF_ESB_MODE_PRX;
		nrf_esb_config.event_handler      = nrf_esb_event_handler;
		nrf_esb_config.selective_auto_ack = true;
		nrf_esb_config.radio_irq_priority = 0;
	}

I don't know if it is correct to use timer to change TX and RX?

Thank you

RE: How does BLE + ESB receive?

Kenneth — Mon, 25 Apr 2022 12:46:54 GMT

Calling rx_payload.noack in the callback irq handler will have no effect.

If you don't want to receive an ack, then set this flag to true before calling nrf_esb_write_payload().

Best regards,
Kenneth

RE: How does BLE + ESB receive?

eric_cheng — Mon, 25 Apr 2022 12:08:15 GMT

Thank you,

TX can close or open ack, I understand this

but for RX

《rx_payload.noack = true;》What does this code do?

RE: How does BLE + ESB receive?

Kenneth — Mon, 25 Apr 2022 11:12:07 GMT

[quote user="eric_cheng"]RX can choose to turn off ack (do not send response to TX)[/quote]

This is not possible, it's only the TX that can control whether it want an ACK or not.

[quote user="eric_cheng"]TX can also choose to turn off ack (no response is received)[/quote]

Correct.

RE: How does BLE + ESB receive?

eric_cheng — Mon, 25 Apr 2022 09:39:44 GMT

Hi,

Thank you for your reply

I want to discuss the content of your reply in two parts

Have in mind that when you are not using ACK, it is a chance that one or both devices will not receive the packet.

In my understanding, TX can send data to Rx

If RX wants to send data to TX, it must use ACK

RX can choose to turn off ack (do not send response to TX)

TX can also choose to turn off ack (no response is received)

Do I have a wrong understanding? (If I'm wrong, hope you can correct me)

=========================

So just to make sure I don't misunderstand the problem here, 
are some packets received from the relay, 
or are no packet received from the relay?

"Relay" will only receive BLE data and send ESB_ ptx

As for other Devices, they have the functions of TX and RX at the same time

Thank you

RE: How does BLE + ESB receive?

Kenneth — Mon, 25 Apr 2022 07:46:25 GMT

Have in mind that when you are not using ACK, it is a chance that one or both devices will not receive the packet. So just to make sure I don't misunderstand the problem here, are some packets received from the relay, or are no packet received from the relay?

Kenneth

RE: How does BLE + ESB receive?

eric_cheng — Fri, 22 Apr 2022 06:32:40 GMT

Hi,

I tried to turn off ack

But there are still out of synchronization

Any of my products can be used as "relay"

So their program are the same

Under this premise, all products (including "relay")

Both lines of code will be executed

nrf_esb_config.selective_auto_ack = true;
rx_payload.noack = true;

==================

I'm thinking about a problem

"relay" after pairing with mobile phone

"relay" sends an instruction to notify the nearby device to turn off Bluetooth

Do you think this way can solve the synchronization problem?

Thank you

RE: How does BLE + ESB receive?

Sigurd Hellesvik — Tue, 19 Apr 2022 12:48:12 GMT

Hi Eric

Try to use

nrf_esb_config.selective_auto_ack = true;
rx_payload.noack = true;

on the "relay" and only

nrf_esb_config.selective_auto_ack = true;

on the two other devices.

Does this fix your issue?

Regards,
Sigurd Hellesvik

RE: How does BLE + ESB receive?

eric_cheng — Mon, 18 Apr 2022 04:04:56 GMT

Hi ,

Can you answer this question, please?

Thank you

RE: How does BLE + ESB receive?

eric_cheng — Wed, 13 Apr 2022 15:04:34 GMT

Hi Nordic Engineer,

Thank you for your reply

I use nRF52811

I tried, but the synchronization problem I encountered couldn't be solved

Can I describe my application scenario?

I hope there are more devices(nRF52811)

But let me assume 3 devices first

The burning procedures of these 3 devices are the same

It means that any device can be paired with a mobile phone (User autonomy)

But the phone will only pair with 1 device (I call it relay)

The remaining 2 unpaired devices will be in ESB_ RX status

These 2 devices should receive the data sent by "relay" in time

After the mobile phone sends data, "relay" and device should be synchronized as much as possible

To do this, I want to turn off all "ack"

In addition, I tried to turn off another "ack"

nrf_esb_config.selective_auto_ack = true;

This did not make the effect better

So what should I do?

Thank you

RE: How does BLE + ESB receive?

Sigurd Hellesvik — Wed, 13 Apr 2022 12:57:34 GMT

Hi Eric

Which microcontroller are you using?

[quote user=""]

If I add code after 473 lines

rx_payload.noack = true

[/quote]

Have you tried this yourself?
If so, did it disable the ack in the rx payload as expected?

Regards,
Sigurd Hellesvik