How to to know the UUID device on connect

RE: How to to know the UUID device on connect

Andrea Verdecchia — Thu, 23 May 2024 08:39:17 GMT

I found the error: I need to use

bt_uuid_to_str( filter_match->uuid.uuid[ 0 ], uuid, sizeof( uuid ) );

RE: How to to know the UUID device on connect

Andrea Verdecchia — Thu, 23 May 2024 08:15:41 GMT

Ok. But now I'm trying to read the UUID in the scan_filter_match() callback but I can't. My callback is like

void scan_filter_match_cb( struct bt_scan_device_info *device_info, struct bt_scan_filter_match *filter_match, bool connectable )
{
	char addr[ BT_ADDR_LE_STR_LEN ];
    char uuid[ BT_UUID_STR_LEN ];

	bt_addr_le_to_str( device_info->recv_info->addr, addr, sizeof( addr ) );
    bt_uuid_to_str( filter_match->uuid.uuid, uuid, sizeof( uuid ) );
    LOG_INF( "Filters matched. Address: %s connectable: %d uuid: %s", addr, connectable, uuid );
}

but the uuid string is null. I get

Filters matched. Address: C3:73:08:D3:D5:36 (random) connectable: 0 uuid

Am I fetching the uuid in the right way?

RE: How to to know the UUID device on connect

Vidar Berg — Wed, 22 May 2024 11:03:49 GMT

Hello,

The connection object only includes information about the connection, such as the BLE address. It does not include information about what was included in the advertisement payload. However, you can use your scan_filter_match() callback to check which UUID filter a given device matched with and map this to a connection object.

Best regards,

Vidar