iBeacon sample filtering by a modified central hr samples

[Ignacio]

Hi,

I am trying to filter an iBeacon sample using a modified version of the central_hr_code.

Changes on the central_hr_code:

Added 128-bit UUID definition:

#define BT_UUID_IBEACON_VAL \
	BT_UUID_128_ENCODE(0x18ee1516, 0x016b, 0x4bec, 0xad96, 0xbcb96d166e97)

/** @brief Throughput Service UUID. */
#define BT_UUID_IBEACON                                                     \
	BT_UUID_DECLARE_128(BT_UUID_IBEACON_VAL)
	
static struct bt_uuid *uuid128 = BT_UUID_IBEACON;

Added 128-bit filter. Commented out hr filter:

    err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_UUID, uuid128);
	if (err) {
		printk("Scanning filters cannot be set\n");

		return;
	}


	//err = bt_scan_filter_add(BT_SCAN_FILTER_TYPE_UUID, BT_UUID_HRS);
	//if (err) {
	//	printk("Scanning filters cannot be set (err %d)\n", err);

	//	return;
	//}

Commented out PHY CODED features:

	/* Use active scanning and disable duplicate filtering to handle any
	 * devices that might update their advertising data at runtime. */
	struct bt_le_scan_param scan_param = {
		.type     = BT_LE_SCAN_TYPE_ACTIVE,
		.interval = BT_GAP_SCAN_FAST_INTERVAL,
		.window   = BT_GAP_SCAN_FAST_WINDOW,
        //  Option to use PHY CODED for range extension
	//	.options  = BT_LE_SCAN_OPT_CODED | BT_LE_SCAN_OPT_NO_1M
	};

No changes have been made on the iBeacon side. Why the central device cannot filter the iBeacon UUID? At the moment I don't have any filter match report while scanning.

Thanks

[Ignacio]

A couple of points to add:

- The 128-bit UUID filter has been replicated from the throughput sample. I have tested this sample and the filtering works for another throughput device.

- All the samples are taken from the nRF Connect SDK v1.7.1

[Edvin]

Hello,

The first thing I think of is whether you remembered to add the line:

err = bt_scan_filter_enable(BT_SCAN_UUID_FILTER, false);

And check the return value of this. I tested briefly using the central_uart sample, where I just replaced the UUID that I searched for with the iBeacon UUID, and it worked fine here.

Best regards,

Edvin

[Ignacio]

Yes. That line is in the central_hr_code sample. I have not modified that line or any other parts of the code in the sample code.

[Ignacio]

Any update?

[Edvin]

As mentioned, I tested it by only swapping the UUID in the filter, and that works for me. Perhaps you can send me the  projects that you are using (beacon and scanner) so that I can have a look?

Best regards,

Edvin