applications: nrf5340_audio: Utilize <err>_to_str() APIs

When developing Bluetooth applications,
you typically run into some errors.
If you are an experienced Bluetooth developer,
you would typically know how to translate the error codes into
string representations. Others might not.

This commit starts using `bt_hci_err_to_str()` and
`bt_security_err_to_str()`.

To enable string printing, enable `CONFIG_BT_HCI_ERR_TO_STR`
and `CONFIG_BT_SECURITY_ERR_TO_STR`.

The format used is equal to the one added in
zephyrproject-rtos/zephyr#75442.

Signed-off-by: Rubin Gerritsen <[email protected]>

applications/nrf5340_audio/src/bluetooth/bt_management/bt_mgmt.c

@@ -80,8 +80,8 @@ static void connected_cb(struct bt_conn *conn, uint8_t err)
 		if (err == BT_HCI_ERR_UNKNOWN_CONN_ID) {
 			LOG_WRN("ACL connection to addr: %s timed out, will try again", addr);
 		} else {
-			LOG_ERR("ACL connection to addr: %s, conn: %p, failed, error %d", addr,
-				(void *)conn, err);
+			LOG_ERR("ACL connection to addr: %s, conn: %p, failed, error %d %s", addr,
+				(void *)conn, err, bt_hci_err_to_str(err));
 		}
 
 		bt_conn_unref(conn);
@@ -133,7 +133,7 @@ static void disconnected_cb(struct bt_conn *conn, uint8_t reason)
 	(void)bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
 
 	/* NOTE: The string below is used by the Nordic CI system */
-	LOG_INF("Disconnected: %s (reason 0x%02x)", addr, reason);
+	LOG_INF("Disconnected: %s, reason 0x%02x %s", addr, reason, bt_hci_err_to_str(reason));
 
 	if (IS_ENABLED(CONFIG_BT_CENTRAL)) {
 		bt_conn_unref(conn);
@@ -172,7 +172,8 @@ static void security_changed_cb(struct bt_conn *conn, bt_security_t level, enum
 	struct bt_mgmt_msg msg;
 
 	if (err) {
-		LOG_WRN("Security failed: level %d err %d", level, err);
+		LOG_WRN("Security failed: level %d err %d %s", level, err,
+			bt_security_err_to_str(err));
 		ret = bt_conn_disconnect(conn, BT_HCI_ERR_AUTH_FAIL);
 		if (ret) {
 			LOG_WRN("Failed to disconnect %d", ret);