Zephyr - Device does not advertise if advertisement data is set

RE: Zephyr - Device does not advertise if advertisement data is set

Simon — Tue, 15 Jun 2021 13:14:08 GMT

I've not worked too much with this, so if you would you be able to upload your whole application in zipped format, that would be nice. Then I'll test it out/ask internally and see if I can get it to work.

RE: Zephyr - Device does not advertise if advertisement data is set

smackenzie — Mon, 14 Jun 2021 22:46:37 GMT

This code does not work. I can not see any advertisements in the nrfconnect application. However there is no error anywhere being reported.

constexpr bt_le_adv_param  params =  BT_LE_ADV_PARAM_INIT(
	BT_LE_ADV_OPT_USE_NAME | BT_LE_ADV_OPT_USE_IDENTITY | BT_LE_ADV_OPT_CONNECTABLE,
	BT_GAP_ADV_FAST_INT_MIN_2,
	BT_GAP_ADV_FAST_INT_MAX_2,
	NULL
);
	

int err = bt_le_ext_adv_create(&params, &cbs, &adv);
__ASSERT(err == 0, "Create advertiser init");

AdvData data {
	AdvField<uint8_t>  { BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR) },
	AdvField<uint16_t> { BT_DATA_MANUFACTURER_DATA, 0x1234 }
};
err = bt_le_ext_adv_set_data(adv, data.data(), data.size(), 0, 0);
__ASSERT(err == 0, "advertiser_set_data");
	

bt_le_ext_adv_start_param start_params = {
	.timeout = 0,
	.num_events = 0
};
err = bt_le_ext_adv_start(adv, &start_params);
__ASSERT(err == 0, "advertiser_start_advertising");

If I either remove the `bt_le_ext_adv_set_data` or remove the `BT_LE_ADV_OPT_CONNECTABLE` flag, the code starts working and I can see the advertisements in the nrfconnect application.

Its the combination of both setting the data and being connectable that is causing an issue.

Is there some requirement I am missing?

RE: Zephyr - Device does not advertise if advertisement data is set

Simon — Mon, 14 Jun 2021 15:40:21 GMT

[quote user=""]How do I correctly set the advertisement data before starting advertising using the `bt_le_ext` methods?[/quote]

Take a look at the sample /ncs/nrf/samples/bluetooth/peripheral_hr_coded/src/main.c, which does this. This sample does not support the nRF52832, but it should give you an idea how to go about it.

First it sets the ext adv data:

https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/samples/bluetooth/peripheral_hr_coded/src/main.c#L166

https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/samples/bluetooth/peripheral_hr_coded/src/main.c#L91

Then it starts the advertising

https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/samples/bluetooth/peripheral_hr_coded/src/main.c#L127

https://github.com/nrfconnect/sdk-nrf/blob/v1.5.1/samples/bluetooth/peripheral_hr_coded/src/main.c#L100

Best regards,

Simon