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Chapter 3 Radar Communication Protocol
1. Overviews
T
he radar outputs FEh FDh FDh FEh after power is on and reset, and then enters the speed
measurement state. The default measurement range is between 05h and F0h (corresponding to 5
～
240km/h).The parameters of radar can be set after pressing the “Enter the setup” command, which
takes the radar into the configuration state. The radar can return to the measurement state when
pressing the “Exit the setup” after parameter settings are completed.
There are three kinds of working mode:
The first is continuous mode. The radar outputs a speed data with interval of 26 milliseconds
when the target is passing through the detection area, and outputs 00h when there is no target.
The second is trigger mode. The radar outputs data only when the target is detected and has
no output if there is no target;
The third is answer mode. The radar outputs the speed data only when the host computer
sends command for request (F7h) in the speed measurement state. The ex-factory setting is
trigger mode and the speed measurement data is a single byte.
Attention: The default of this equipment is the second mode.
2. Set Command
Set Command Format
Frame header
Command
Parameter(Double byte)
Frame tail
FAh
3xh
yyh yyh
FBh
x indicates specific commands
Reply from the radar
Frame header
Length
Content
Frame tail
FAh
3xh
FBh
x indicates the number of bytes
The relevant order and response is shown as following:
