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TCS-GPS help on line: GPRS option
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TCS-GPS help on line



 
TCS-GPS is also available with the GPRS option. In this case you need to setup some parameters and this is how to do it.
We assume that you are familiar with GPRS and its terms.
This device will send UDP packets to a specific IP address and port. It doesn't e-mail, ftp its data. It sends them as UDP (User Defined Protocol) packets. This means that using it is simple for a software engineer but it is not trivial.
The packet format is the same as the packet that is logged into the flash Eprom, and that can be retrieved with a standard data call.

In order to be able to send the packets, the device needs the following:
  • A command to decide how often it has to send the packets. This is done with the LGG command.
  • A command to define to which port to send the UDP packets. This is obtained with the PIP command.
  • A command to define the APN and other CGDCONT parameters. This is obtained with the ATCAT+CGDCONT command.
  • This last command uses the command #ATC to send AT commands directly to the GSM modem.
    Some operators, (most), don't require user id and password because they can recognize their SIMs. In this case you simply need to program the APN (Access Point Name) that will let you connect to the internet. Ask your operator which is their APN for the internet and issue the following command:
    #ATCAT+CGDCONT=1,"IP","APN" where you will put the real one in place of APN (i.e. web.omnitel.it or similar)

    Some other operators require user id and password. in this case you need to obtain from them the 4 parameters: APN, i_a (internet account), user id, password and program all of them, using the following commands:
    #ATCAT+CGDCONT=1,"IP","APN"
    #ATCAT*ENAD=1,"i_a","userid","password",1,1

    As an example, in Italy the operator TIM requires user ID and password and we have to program as follows: #ATCAT+CGDCONT=1,"IP","uni.tim.it"
    #ATCAT*ENAD=1,"TIM","userid","password",1,1
     
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