Custom scan interval & window to be 100,150,200.

[Manas_punjabi]

Hi , I wanted to know how to change the scan interval and scan window to required timings , since only a few options available with using the given macros in gap.h ?

[Manas_punjabi]

using nrf connect 2.1.1 with 52833 dk

[Maria Gilje]

Hello,

The scan interval and window can be specified with the struct bt_le_scan_param (documented here).

When the parameters of the struct is filled, it is used as the value for the .scan_param parameter in a bt_scan_init_param struct. Then the bt_scan_init_param struct is passed to bt_init_scan.

Below is how this is done in the Bluetooth Throughput sample from nRF Connect SDK v2.1.1.

	struct bt_le_scan_param scan_param = {
		.type = BT_LE_SCAN_TYPE_PASSIVE,
		.options = BT_LE_SCAN_OPT_FILTER_DUPLICATE,
		.interval = 0x0010,
		.window = 0x0010,
	};

	struct bt_scan_init_param scan_init = {
		.connect_if_match = 1,
		.scan_param = &scan_param,
		.conn_param = conn_param
	};

	bt_scan_init(&scan_init);

The values for .interval and .window can be changed to meet your requirements.

Kind Regards,
Maria