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(2) Fence Reading Function
Send commands to the terminal: # command number (752) # user
password 4 digits ##; after the command is set successfully, the terminal
will read the data of the module fence working status and return message
to the sending mobile phone, or PASSWORD ER if the password is
wrong.
Example: #752#0000##
Return:#open:1#lat:11456.209400#lng:2233.470100#distance:500#time:5
#status:2
Where, open: 1 indicates fence open; Open: 0 indicates fence closed;
lat:11456.209400, latitude;
lng: 2233.470100; longitude;
distance: 500; fence radius;
time: 5 sampling interval;
status: 2, terminal has obtained valid satellite data, fence works normally;
status: 1, fence open, but there are no valid satellite data have been
received;
status: 0, no electronic fence is set.
