xbee_dev_send('A', NULL);
xbee_dev_send('T', NULL);
xbee_dev_send('C', NULL);
xbee_dev_send('N', NULL);
xbee_dev_send('\n', NULL);
xbee_dev_send('A', NULL);
xbee_dev_send('T', NULL);
xbee_dev_send('C', NULL);
xbee_dev_send('N', NULL);
xbee_dev_send('\n', NULL);