NWK200: How To Connect To The Modem

Connecting to modem via PuTTY (Windows)

  1. In the Device Manager, find out which virtual COM the modem is attached to.
    • Open the ‘Modems’ category fly-out
    • Right click the Sierra modem entry
    • Select properties. The port number [n] is listed at the top of the main page
  2. Open PuTTY
    • Select the Serial radio button in the main window
    • In the <<connection>> box, replace COM1 with the COM[n] from the modem properties
    • Set the baud rate to 115200
    • Click Open.
  3. Make the modem “echo” back the commands. In the terminal window, type:
    • ATE1 and press Enter. It is possible that no text will be displayed until the command is executed
  4. If Windows 7 is installed, change USB communication mode from QMI to MBIM with the following commands
    • AT!ENTERCND=”passwd” <–where passwd is replace with actual password
    • AT!USBCOMP=1,1,100D
  5. User can now send any AT commands necessary

Connecting to modem via minicom (Ubuntu)

  1. From Ubuntu terminal
    sudo minicom -s
    • Serial port setup
      • Press a – change name to ‘/dev/ttyUSB2’
      • Press g to change software flow control to YES
      • Exit (this will drop you to a new shell)
    • Make the modem “echo” back the commandes. In the terminal window, type:
      ATE1
  2. User can now send any AT commands necessary

Updated on April 7, 2019

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