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Asked: 2026-05-29T08:48:18+00:00

I’ve read most of the posts regarding this matter but I find nothing that

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I’ve read most of the posts regarding this matter but I find nothing that is relevant to my problem.

I don’t know how to connect to the modem with php code.
I would greatly appreciate any help or links to where I can find the code.

I have a Sierra Wireless 3G modem. It is connected to Port_#0006.Hub_#0003

I found that the commands sent to the modem should look something like below

AT+CMGF=1
OK<br>
AT+CMGS="+31123456789"
> This is the text message.→
+CMGS: 198
OK
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1 Answer

  1. Editorial Team

    In most cases the Wireless modem will create a virtual serial port

    • On Windows look at device manager, View->Devices by Connection and
      follow the tree back from the modem to find the COMn port (n being
      what you need to identify).
    • On linux look for /dev/ttyUSBn (again n being what you need to identify).

    You can then fopen() the device file (\\.\comn on Windows, /dev/ttyUSBn on Linux) and fwrite() your comands there.

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