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Telit LE910C4

Telit LTE cellular module​

Support Module List:​

Install libqmi tools​

  • For [Ubuntu 20.04] / [Debian 9/10/11]
apt-get install libqmi-utils -y
  • For CentOS 7.9
yum install libqmi-utils -y

Disable ModemManager service (if necessary)​

Due to ModemManager service is occupying cdc-wdm device node, to disable service is suggested.

systemctl disable ModemManager.service

Check DIP switch status​

  • Power on module
    • Ensure DIP switch status is 'OFF' on target slot
    • Power on cellular module
  • Check SIM slot is selected (if using dual SIM card slots)

Check QMI wwan driver is loaded​

$ dmesg | grep qmi
[  783.731551] qmi_wwan 1-7:1.2: cdc-wdm0: USB WDM device
[  783.732748] qmi_wwan 1-7:1.2 wwan0: register 'qmi_wwan' at usb-0000:00:14.0-7, WWAN/QMI device, d2:c4:e0:a2:4f:95
[  783.732862] usbcore: registered new interface driver qmi_wwan

$ ip a | grep wwan
5: wwan0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000

Start connection​

  • Network interface:

    • assume cellular NIC is wwan0
    • assume cdc-wdm interface is /dev/cdc-wdm0

  • Check sim status

# if return message shows Card state: 'present', means SIM card is available
qmicli -d /dev/cdc-wdm0 -p --uim-get-card-status

# (optional) set PIN code, e.g. '0000'
qmicli --device=/dev/cdc-wdm0 -p --uim-verify-pin=PIN1,0000
  • Enable raw ip function
echo Y > /sys/class/net/wwan0/qmi/raw_ip
  • Start network status via qmicli
ifconfig wwan0 up

qmicli -v -d /dev/cdc-wdm0 \
  -p --wds-start-network="ip-type=4,apn=internet" \
  --client-no-release-cid \
  --device-open-"net=net-raw-ip|net-no-qos-header"
  • Check qmi network status
# if translated = SUCCESS, check internet status
qmicli -d /dev/cdc-wdm0 --wds-get-current-settings
  • For example:
[/dev/cdc-wdm0] Current settings retrieved:
           IP Family: IPv4
        IPv4 address: 10.72.185.156
    IPv4 subnet mask: 255.255.255.248
IPv4 gateway address: 10.72.185.157
    IPv4 primary DNS: 61.31.1.1
  IPv4 secondary DNS: 61.31.233.1
                 MTU: 1430
             Domains: none
  • Setup cellular network interface
# according the network information to setup ip, gateway and DNS
_ADDR=$(qmicli -d /dev/cdc-wdm0 --wds-get-current-settings | grep "IPv4 address" | awk '{print $3}')
_NETMASK=$(qmicli -d /dev/cdc-wdm0 --wds-get-current-settings | grep "IPv4 subnet mask" | awk '{print $4}')
_GW=$(qmicli -d /dev/cdc-wdm0 --wds-get-current-settings | grep "IPv4 gateway address" | awk '{print $4}')
_DNS=$(qmicli -d /dev/cdc-wdm0 --wds-get-current-settings | grep "IPv4 primary DNS" | awk '{print $4}')

ifconfig wwan0 ${_ADDR} netmask ${_NETMASK}
route add default gw ${_GW} dev wwan0
echo "nameserver ${_DNS}" >> /etc/resolv.conf

# ping google test
ping google.com -Iwwan0 -c 10

Enable GPS function​

  • For V2406C-KL/V2406C-WL/V2403C-KL series
FunctionDevice Node
GPS_PORT/dev/ttyUSB1
AT_PORT/dev/ttyUSB2
  • For MC-3201-TL series
FunctionDevice Node
GPS_PORT/dev/ttyUSB5
AT_PORT/dev/ttyUSB6
# build AT-command utility
git clone https://github.com/Moxa-Linux/moxa-at-cmd.git
cd moxa-at-cmd
make && make install

# enable GPS function
mxat -d ${AT_PORT} -c 'AT$GPSRST' -t 1
mxat -d ${AT_PORT} -c 'AT$GPSNMUN=2,1,1,1,1,1,1' -t 1
mxat -d ${AT_PORT} -c 'AT$GPSP=1' -t 2

# read tty serial port to fetch GPS information
cat ${GPS_PORT}
  • Get GPS information from tty serial port:
$GPVTG,,T,,M,,N,,K,N*2C

$GPGSA,A,1,,,,,,,,,,,,,,,,*32

$GPGGA,,,,,,0,,,,,,,,*66

$GPRMC,,V,,,,,,,,,,N,V*29

$GPGLL,,,,,,V,N*64
  • Disable GPS function
mxat -d ${AT_PORT} -c 'AT$GPSRST' -t 1
mxat -d ${AT_PORT} -c 'AT$GPSNMUN=0,1,0,0,0,0,0' -t 1

Reference​

Last updated on 2022-04-26 by Wilson Huang