RE: peripheral and central NCS `bt_conn`

Vojislav — Tue, 03 May 2022 07:02:13 GMT

Thanks for the idea! This is what I needed.

Best,
Vojislav

RE: peripheral and central NCS `bt_conn`

Edvin — Fri, 22 Apr 2022 07:50:52 GMT

Hello Vojislav,

You can use the function bt_conn_get_info() from your connected callback to check the role of the connected device.

So in your connection event callback, you probably already have something like this:

static void connected(struct bt_conn *conn, uint8_t err)
{
	char addr[BT_ADDR_LE_STR_LEN];

	if (err) {
		LOG_ERR("Connection failed (err %u)", err);
		return;
	}

	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
	LOG_INF("Connected %s", log_strdup(addr));

	current_conn = bt_conn_ref(conn);

	dk_set_led_on(CON_STATUS_LED);
}

Try adding this towards the end (at least after current_conn = bt_conn_ref(conn);)

struct bt_conn_info my_conn_info;
int ret_val;

ret_val = bt_conn_get_info(current_conn, &my_conn_info);
if (ret_val) {
    LOG_INF("bt_conn_geT_info failed with %d", ret_val);
}
if (my_conn_info.role == BT_CONN_ROLE_CENTRAL){
    LOG_INF("I am central in this connection");
}
else if (my_conn_info.role == BT_CONN_ROLE_PERIPHERAL){
    LOG_INF("I am peripheral in this connection");
}

Of course, you probably want to do something other than just printing whether you are the central or the peripheral, but you get the idea 🙂

Best regards,

Edvin