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Now its time to power up your modem. You may read the official Official manufacturer [http://telit.com/module/infopool/download.php?id=1666 hardware user guideHardware User Guide], where there is a complete explanation about the sequence.<br>
In IGEP0022, the modem is connected to 3 GPIO pins from the OMAP, which are: <omap_pin_name (modem_function)>
You can power up your modem using the following sequence:
(Note: the following instructions are correctly 'toggled' do to pull-up resistors. Refer to schematics at the official Official [http://igep.es/index.php?option=com_content&view=article&id=99&Itemid=129&dir=%2Fvar%2Fwww%2Fvhosts%2Figep.es%2Fhttpdocs%2Fdownloads%2F01-ISEE_Products%2FIGEPv2_EXPANSION%2FHW_Schematics&download_file=%2Fvar%2Fwww%2Fvhosts%2Figep.es%2Fhttpdocs%2Fdownloads%2F01-ISEE_Products%2FIGEPv2_EXPANSION%2FHW_Schematics%2FIGEP.0022-EXP_BOARD_SCH_rev_b3.pdf IGEP0022 Hardware Manual] from ISEE)
<pre>echo 0 > /sys/class/gpio/gpio140/value
echo 1 > /sys/class/gpio/gpio141/value
(Note: correcting syntax with 'backspace' may cause error in a serial command if you are not writing the command at first take)
In order to use your GSM/GPRS you should connect the antenna as it is explained in the [[Getting_Started_with_IGEP0022_boardGetting Started with IGEP0022 board#GSM/GPRS antenna |getting started Getting Started with IGEP0022]] article.
Then you can insert a valid SIM card to the SIM card reader of your IGEP0022 expansion board.
Now unlock it by inserting your SIM card PIN number. Use the command:<br>
If you successfully '''followed the the previous instructions''', you are ready to test the GSM/GPRS modem. Here are some examples of simple commands:
You can check the complete list of AT commands at the official Official manufacturer [http://telit.com/module/infopool/download.php?id=522 software user guideSoftware User Guide].
=== Making a phone call<br> ===
