nrf54l15-dk use ESL

RE: nrf54l15-dk use ESL

dede — Fri, 21 Mar 2025 09:53:25 GMT

Hi,

I have learned ESL related knowledge, but it seems more complicated, it may be more difficult to achieve.

So far I have implemented communication using AP and two tags, but I don't know how to control the AP to communicate with the specified tags. Maybe I should change the code in the periodic_adv_rsp example, but I don't know how.

Maybe I should change "request_cb"(NCS\v2.8.0\zephyr\samples\bluetooth\periodic_adv_rsp). Can you provide a simple example?

static void request_cb(struct bt_le_ext_adv *adv, const struct bt_le_per_adv_data_request *request)
{
	int err;
	uint8_t to_send;
	struct net_buf_simple *buf;

	to_send = MIN(request->count, ARRAY_SIZE(subevent_data_params));

	for (size_t i = 0; i < to_send; i++) {
		buf = &bufs[i];
		buf->data[buf->len - 1] = counter++;

		subevent_data_params[i].subevent =
			(request->start + i) % per_adv_params.num_subevents;
		subevent_data_params[i].response_slot_start = 0;
		subevent_data_params[i].response_slot_count = NUM_RSP_SLOTS;
		subevent_data_params[i].data = buf;
	}

	err = bt_le_per_adv_set_subevent_data(adv, to_send, subevent_data_params);
	if (err) {
		printk("Failed to set subevent data (err %d)\n", err);
	} else {
		printk("Subevent data set %d\n", counter);
	}
}

Thanks.

RE: nrf54l15-dk use ESL

Lorenzo Amicucci — Wed, 19 Mar 2025 14:16:05 GMT

we actually added experimental support of nRF54L15DK in this branch for BT ESL. Waiting SDK 3.0 or later releases for complete support
https://github.com/NordicPlayground/nrf-esl-bluetooth/tree/v2.8-branch

Please also note this blog on PAwR to get started with simple example: Periodic Advertising with Responses (PAwR): A practical guide

Note: using PAST procedure, your tag can sync to the Central. However, then you need some application logics to tell which tags should sync to which subevent. In BT ESL, this is done based on the ESL Address (Group ID + ESL ID). These are upper layer logics, you can decide if you start from zero.

We have training on BT ESL Here (see youtube link in this blog):
Getting started with Bluetooth Electronic Shelf Labels (ESL) and Periodic Advertising with Responses (PAwR)

since you are in China, we have link also in Bilibili:

In Chinese language : https://www.bilibili.com/video/BV11u4y1r7NF/?spm_id_from=333.1387.search.video_card.click

and BT ESL Tutorials (same as youtube video mentioned above in the getting started blog):
part 1 https://www.bilibili.com/video/BV12BsZe8Euk/?spm_id_from=333.1387.search.video_card.click
part 2 https://www.bilibili.com/video/BV1PksZeoEAy/?spm_id_from=333.1387.search.video_card.click
part 3 https://www.bilibili.com/video/BV1PrsZetECk/?spm_id_from=333.1387.search.video_card.click

RE: nrf54l15-dk use ESL

Kenneth — Wed, 19 Mar 2025 14:14:11 GMT

Hello,

If you haven't already I recommend to get a bit familiar with nRF Connect SDK (NCS) and BLE development by following:
https://academy.nordicsemi.com/

In specific these two may be a good start:
https://academy.nordicsemi.com/courses/nrf-connect-sdk-fundamentals/
https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/

That should give you much better confidence to play around with the PAWR examples:
https://docs.nordicsemi.com/bundle/ncs-2.9.1/page/zephyr/samples/bluetooth/periodic_adv_rsp/README.html#ble_periodic_adv_rsp
https://docs.nordicsemi.com/bundle/ncs-2.9.1/page/zephyr/samples/bluetooth/periodic_sync_rsp/README.html#ble_periodic_adv_sync_rsp

The ESL example have not been updated since NCS v2.5.x, which means it doesn't support the new nRF54L15. If you want to use PAWR you should instead look at the above examples.

Kenneth