UAV-1001626-001 Rev F
ECCN 7A994
Page
27 | 30
Appendix A. GDL 90 Compatible Control Protocol Format
(Control RX - RS-232 57600bps, N81)
The ping20Si receives control messages over the Control interface. The
interface uses an ASCII-text basis, with an ASCII-encoded hexadecimal
checksum. The checksum is algebraic sum of the message byte values.
Messages are delimited with a carriage return character.
A1. Physical Interface.
The Control interface uses RS-232 signaling levels. The port is configured
for the following characteristics:
•
Baud Rate: 57600 baud
•
Start Bits: 1
•
Data Length: 8
•
Stop Bits: 1
•
Parity: None
•
Flow Control: None
A2. Control Messages.
The following table summarizes the Control messages that the ping20Si
receives.
Msg ID
Description
Notes
Ref
^CS
Call Sign
1 min interval or on
change
A2.1
^MD
Operating Mode Message 1 second interval
(nominal)
A2.2
^VC
VFR Code
1 min interval or on
change
A2.3
