ao_tx_packet.addr = ao_serial_number;
ao_tx_packet.len = AO_PACKET_SYN;
while (ao_packet_enable) {
if (ao_packet_recv()) {
memcpy(&ao_tx_packet.callsign, &ao_rx_packet.packet.callsign, AO_MAX_CALLSIGN);
ao_tx_packet.addr = ao_serial_number;
ao_tx_packet.len = AO_PACKET_SYN;
while (ao_packet_enable) {
if (ao_packet_recv()) {
memcpy(&ao_tx_packet.callsign, &ao_rx_packet.packet.callsign, AO_MAX_CALLSIGN);