
XF Evaluation Board User Guide JA20-XF_UM-Eval-Bd Page 8 Rev: 00 Date: 03/01/18
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4. Getting Started
This will take you through the initial steps required that will allow AT commands to be sent to a Telit based cellular XF
Plug-In Modem. Some of the following components typically provided with XF Evaluation Kits will be required:
XF Evaluation Board 1
XF Plug-In Modem 1
Wall transformer, 5V 1
Type-B USB cable 1
Cellular Antenna(s) 1 or 2
GPS Antenna Optional
U.FL to SMA Cable 1 to 3
• Insert the SIM card if the XF Plug-in Modem has a SIM holder.
Turning ON the XF Evaluation Board
• Insert the SIM card if the XF Plug-in Modem has a SIM holder.
• A SIM card will be required for connecting to a cellular network with most cellular modems. Even without a SIM card,
any operational features of the cellular modem will still be available.
• Before connecting power to the XF Evaluation Board, plug a XF Plug-in modem into the sockets on the board. Connect
the XF Plug-in Modem into the Evaluation Kit Sockets.
• Make sure the alignment of the XF modem is correct, before placing it into the sockets.
• Connect a cellular antenna cable to the XF Plug-in Modem (label CELL) and connect a cellular antenna to the other end
of the antenna cable (SMA Connector).
• Connect power to the evaluation board. To use barrel connection, connect the 5V wall transformer power plug to the
power jack (J2) on the XF Evaluation Board. Otherwise use an external supply to connect the 5V to TP1 and GND to TP2
on the XF Evaluation Board.
• Connect power to the VCCIO terminal TP5 (1.8 to 5.5V).
• Press and Hold the ON/OFF Switch (SW1) push-button for 5 seconds to enable the XF Plug-in Modem1.
• After releasing the SW1, the XF Plug-in modem may take several seconds to initialize before it is able to accept AT
commands. Yellow LED will be turned on during this stage if the default #GPIO settings are in effect.
NOTES:
1. The ON/OFF Switch is used for Telit based modems; for other products (e.g. WiFi) refer to the specific XF product User Guide.
2. On Telit based cellular modems you can have the XF Plug-in Modem turn-on automatically when power is applied by shorting the AUTO ON jumper
J1. With this method, the modem can’t be turned off using ON/OFF switch. Refer to the AT command guide for how to turn off modem using the
#SHDN command.
USB Communications
• Follow the steps mention in the Turning On the XF Evaluation Board section to turn on the board.
• Connect the USB cable to the evaluation Kit and to you PC.
• If you are using Windows Operating System, you can go to Device Manger and check the MODEM and COM ports that
are instantiated. Depending on the specific modem, at least one COM port will support AT commands. MODEM ports
also support AT commands; look at the port properties to determine the proper /COM port number to use.
• You should now be able to send ‘AT’ commands to the modem. To confirm a proper connection, send the command
“AT” followed by a line terminator (Enter key) on the terminal and you should see “OK” as the response.