GLOBALSAT TR-203A - Manual (Page 6)

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2.2 Setup Format
2.2.1 Server -> Device
GS S ,IMEI,T,S,x1=y1,x2=y2,x3=y3,……………………*Check Sum!
x1,x2,x3… are code words for configuration parameters.
y1,y2,y3… are their respective settings.
2.2.2 Device -> Server
GS s ,IMEI,T,S,x1=y1,x2=y2,x3=y3,…………………….*Check Sum!
2.3
Geo-fence Format
2.3.1 Server -> Device
GS G ,IMEI,T,S,1=(type,upper_left_Lon,upper_left_Lat,right_bottom_Lon,righ
t_bottom_Lat[,gxxx][,startTime,endTime,weekday]),2=(…),3=(…),…*Check
sum!
2.3.2 Device -> Server
GS g ,IMEI,T,S,1=(type,upper_left_Lon,upper_left_Lat,right_bottom_Lon,righ
t_bottom_Lat[,gxxx][,startTime,endTime,weekday]),2=(…),3=(…),…*Check
sum!