How to use serial forwarder on testbed

How to use the serial forwarder on testbed?

1. To open the serial forwarder on testbed, run the command

forwarder.py -2 -a telosb

2. We can get the packet format used by the serial forwarder in tospacket.py:

byte 0: Delimiter (0x7E)

       1: Protocol: ACK (0x43), PACKET_ACK (0x44) or PACKET_NOACK (0x45)

       2: Sequence number (omitted if protocol is PACKET_NOACK)

       3: Packet type (0x00, omitted if protocol is ACK)

       4: Destination high byte (omitted if protocol is ACK)

       5: Destination low byte (omitted if protocol is ACK)

       6: Source high byte (omitted if protocol is ACK)

       7: Source low byte (omitted if protocol is ACK)

       8: Payload length (omitted if protocol is ACK)

       9: Destination PAN group (omitted if protocol is ACK)

       10: Packet AM type (omitted if protocol is ACK)

       11 .. n-4: Payload (omitted if protocol is ACK)

       n-3: CRC-16 low byte

       n-2: CRC-16 high byte

       n-1: Delimiter (0x7E)