User's Manual

How to manage the product SYS-04240-23 User Manual 1-3
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12.4 How to manage the modem
The modem has 7 serial ports: /dev/ttyUSB[0..6]
(for more information see: Telit_HE910_UE910_Family_Ports_Arrangements_r6.pdf user manual)
To communicate with the modem, use the serial port /dev/ttyUSB2
12.4.1 How to turn ON/OFF the modem
To switch the modem ON/OFF, use the file /sys/class/gpio/modem-enable/value:
• Value '1' means switch ON
• Value '0' means switch OFF
12.4.2 How to reset the modem
To reset the modem, use the file /sys/class/gpio/modem-reset/value and complete the
following steps:
1. Set the reset signal to '1''
Echo 1 >/sys/class/gpio/modem-reset/value
2. Wait for 1 second
Sleep 1
3. Set the reset signal to '0' (the default value)
Echo 0 >/sys/class/gpio/modem-reset/value
12.5 How to turn OFF the product
To turn OFF the product, complete the following steps:
1. Login the Administration Console
2. Enter the command poweroff. The product turns OFF
3. Remove the power from the Power connector.