ConnectedIO CONFIDENTIAL
15
EMU Router User Manual
ifconfig wwan0
qmicli is a command line tool available in the libqmi package.
6.2.
AT Command
Send AT commands through /dev/ttyUSBx. Usually it is /dev/ttyUSB3.
Follow the example below to send AT commands:
echo -en “<place AT command here> \r” > /dev/ttyUSB3 ; cat /dev/ttyUSB3
For example to query APN:
echo -en “AT+CGDCONT? \r” > /dev/ttyUSB3 ; cat /dev/ttyUSB3
6.3.
APN Change
Typically, the APN is auto-configured or auto-detected. The APN change command allows you to change
the local telecommunication company. Enter AT command for changing APN from your shell as follows:
echo -en
‘
AT+CGDCONT=1,”IPV4V6”,”<APN name>”
’
> /dev/ttyUSBx ; cat /dev/ttyUSBx
Usually it is /dev/ttyUSB3
Note: for more information, please refer to Telit’s documentation at:
http://www.cepag.de/images/sampledata/Download/GPRS-UMTS-Terminal-
Downloadbereich/HT910-G-
Terminal/Telit_Linux_Driver_User_Guide_UC_CE_DE910_HE_LE920%20UE_
HE910-V2_r7.pdf
7.
Antenna
7.1.
Antenna – Installation Guidelines
When installing the antenna to the ER1000 product line there are a number of items to consider so good
antenna performance can be maintained.
•
Install the antenna in a place covered by the LTE signal.
•
Antenna must not be installed inside a metal case.
•
Antenna shall also be installed according to the Antenna manufacturer instructions.
•
Antenna integration should optimize the Radiation Efficiency. Efficiency values >50% are
recommended on all frequency bands for any antennas selected.
•
Antenna integration should not dramatically perturb the radiation pattern. It is preferable to get,
after antenna installation, an omnidirectional radiation pattern for the best overall coverage.
•
Antenna Gain must not exceed values indicated in the regulatory requirements in order to meet
related EIRP limitations.
o
Typical antenna Gain in most M2M applications should not exceed 2dBi.
•
At least 20cm of separation distance between the antennas, the collocated router transmitters, and
the human body must be maintained at all times.
