How to get Peripheral service 128 bit UUID before connection???

[Rekha]

Hi i am using nrf52832 development board as central which scans for peripheral devices.

how to get peripheral device service UUID(128 bit) completely before connection?

is it possible to get uuid either using Advertisement packet or scan response packet ?

Thanks,

Rekha

[Rekha]

please upload the code if you have solution for my requirement.

Thanks

[Vidar Berg]

You can use the BLE scanner module to extract UUIDs from the advertisement report event. ble_app_uart_c does this. 

[Rekha]

you mean SCAN FILTERS or manually it is extracting UUID without any encryption decryption mechanism.

[Phil]

Our application does precisely this.  It scans for devices that are advertising and gets the MAC address and RSSI of devices advertising with a given UUID.  Our scanning (Central) device never makes a connection.  I got it going with the nRF51 quite easily.  In main.c there is an event from the BLE stack that indicates when an advertising report is received, and you can read the advertising data.  However, we're moving to the nRF52832, and this seems to have gone, or is hidden within the scanning module. I'm starting from the ble_app_uart example, but the code for dealing with received advertising packets seems to be a nightmare to follow.

Can the application get a notification when an advertising packet has been received? 

[Phil]

I got it.  I added a case for BLE_GAP_EVT_ADV_REPORT in ble_evt_handler() in main.c.

Within the case, I obtained a pointer to the advertising data from the pointer to the ble event data..

	const ble_gap_evt_adv_report_t *p_adv_report;					// Pointer to advertising report
	char txt[20];

    switch (p_ble_evt->header.evt_id)
    {
		case BLE_GAP_EVT_ADV_REPORT:								// This could be an advertising packet or scan response.
			p_adv_report = &p_gap_evt->params.adv_report;						// Point to the advertising data.
			ble_addr_to_str(txt, (uint8_t *)p_adv_report->peer_addr.addr);		// Convert BLE address to string
			printf("adv %s\n", txt);
			break;