Sinotrack ST-901L - 17.Set the IP and Port; 18.Set the time interval

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If your APN need user and pass:
Command 2: 803+password+Blank+ APN+Blank+ APN user+Blank+ APN
pass
Sample: 8030000 INTERNET INTERNET INTERNET
Reply: SET OK
17. Set the IP and Port
Command: 804+password+Blank+IP+Blank+Port
Sample: 8040000 45.112.204.245 8090
Reply: SET OK
18. Set the time interval
ACC on time interval (default is 20 seconds)
Command: 805+password+Blank+T
Sample: 8050000 20
Reply: SET OK
T means the time interval, the unit is second,
It from 0 to 18000 seconds,
When T=0 means close GPRS.
ACC off time interval (default is 180 seconds)
Command: 809+password+Blank+T
Sample: 8090000 180
Reply: SET OK
T means the time interval, the unit is second,
It from 0 to 18000 seconds,
When T=0 means close GPRS.
The minimum time interval is 10 seconds.