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Appendix B Bi-directional communication
The total station controlled by external computer can sent
the information about angle and distance. The settings of
communication and protocol as follow:
● Baud rate: 2400~115200 available
● Data length: 8
●Stop bits: 0
●Parity bits: none
●protocol:
●Code: STX
（
02
），
CR
（
13
），
X_ON(17)
，
X_OFF(19)
The angle ans diatance data are transferred by a form of
fixed length of 7 byte. The unit of angle is “ ° ′ ″ ”, and the
distance unit is “mm”;
Command frame list(“
＋
” means connection)
1. Check communication
Ask: STX+T+C+CR
Respond:
X_ON
2 Set the horizontal angle
Ask: STX+S+A+CR
Respond: X_ON
“HHHHHHH” indicates azimuth angle. Example:
120°43′55″ can be explained “1204355”
3. Read angle data
Ask: STX+R+A +CR
Respond: STX+R+A+CR
“HHHHHHH” is azimuth angle
“VVVVVVV” is vertical angle
4. Read distance and angle data
Ask: STX+R+D +CR
Respond:
