Cellular Modem (PLS8-E)

Getting started

  • Activate modem
    • echo 1 > /opt/hm/pic_attributes/ctrl_modem_on
  • Verify modem
    • /opt/hm/modem_status.sh
  • Activate simple read
    • cat /dev/ttyACM2
  • Simple write commands
    • echo “AT+CFUN?” > /dev/ttyACM2
      • modem status
    • echo “at+COPS?” > /dev/ttyACM2
      • Operator selection

Production settings(default)

  • In some cases the modem AT command channel is not setup then manually send this commands:

    • echo “at^ssrvset=actsrvset” > /dev/ttyACM1

    • echo “^SSRVSET: 10” > /dev/ttyACM1

    • echo “at^scfg=MEShutdown/OnIgnition,on” > /dev/ttyACM1

    • echo “AT^SSRVSET=usbcomp,10,0061” > /dev/ttyACM1

    • echo “AT^SSRVSET=srvmap,10,RSA,USB0,MUX0” > /dev/ttyACM1

    • echo “AT^SSRVSET=srvmap,10,NMEA,USB1,MUX1” > /dev/ttyACM1

    • echo “AT^SSRVSET=srvmap,10,APP,USB2,MUX2” > /dev/ttyACM1

    • echo “AT^SSRVSET=srvmap,10,MDM,USB3,MUX3” > /dev/ttyACM1

    • echo “AT^SSRVSET=actSrvSet, 10” > /dev/ttyACM1

    • Check the result.
      • echo “AT^SSRVSET?” > /dev/ttyACM1
    • Reset the modem to activate the new settings.
      • echo “AT+CFUN=1,1?” > /dev/ttyACM1
  • The result ACM map is:
    • Radio /dev/ttyACM0
    • GPS /dev/ttyACM1
    • AT commands /dev/ttyACM2
    • Modem /dev/ttyACM3

Use Wvdail to get a broadband connection

  • Optional ln -s /dev/ttyACM2 /dev/modem

  • Run wvdailconf

  • vi /etc/wvdail.conf
    • Init1 = ATZ
    • Init2 = AT+CFUN=1
    • Init3 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
    • Init4 = AT+CGDCONT=1,”IP”,”internet.telenor.se”
    • Modem Type = USB Modem
    • ISDN = 0
    • Phone = *99#
    • Modem = /dev/ttyACM3
    • Username=;
    • Password=;
    • Baud = 460800
    • Stupid Mode = yes
    • Auto Reconnect = on
    • New PPPD = yes
    • Auto DNS = 1

  • Run wvdail &

  • Test ping 8.8.8.8

  • Output could look like this:
    root@mx4-v61:~# wvdial &
    [1] 599
    root@mx4-v61:~# –> WvDial: Internet dialer version 1.61
    –> Initializing modem.
    –> Sending: ATZ
    ATZ
    OK
    –> Sending: AT+CFUN=1
    AT+CFUN=1
    OK
    –> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
    ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
    OK
    –> Sending: AT+CGDCONT=1,”IP”,”internet.telenor.se”
    AT+CGDCONT=1,”IP”,”internet.telenor.se”
    OK
    –> Modem initialized.
    –> Sending: ATDT*99#
    –> Waiting for carrier.
    ATDT*99#
    CONNECT 100000000
    –> Carrier detected. Starting PPP immediately.
    –> Starting pppd at Tue Feb 5 10:46:34 2019
    –> Pid of pppd: 600
    –> Using interface ppp0
    root@mx4-v61:~# –> local IP address 46.194.12.163
    –> remote IP address 10.64.64.64
    –> primary DNS address 195.54.122.211
    –> secondary DNS address 195.54.122.221

Use GPS (simple commands)

  • This is just one way of many ways to setup and get gps position data.
    • echo “AT^SGPSC=?” > /dev/ttyACM2
    • echo “AT^SGPSC=”Engine”,0” > /dev/ttyACM2
    • echo “AT^SBNW=agps,-1” > /dev/ttyACM2
    • echo “AT^SGPSC=”Nmea/Freq”,1” > /dev/ttyACM2
    • echo “AT^SGPSC=”Nmea/Glonasst”,on” > /dev/ttyACM2
    • echo “AT^SGPSC=”Nmea/Output”,on” > /dev/ttyACM2
    • echo “AT^SGPSC=”Nmea/Urc”,off” > /dev/ttyACM2
    • echo “AT^SGPSC=”Power/Antenna”,auto” > /dev/ttyACM2
    • echo “AT^SGPSC=”Engine”,1” > /dev/ttyACM2
    • echo “AT^SGPSC?” > /dev/ttyACM2
    • cat /dev/ttyACM1 & **or**gps-parser /dev/ttyACM1
    • Output example (gps-parser)
    +GPRMC: Fix Time: 19222 12:37:9 Lat: 57.40.431402, Long: 12.0.831634 Speed: 0
    +GPRMC: Fix Time: 19222 12:37:10 Lat: 57.40.431402, Long: 12.0.831650 Speed: 0
    +GPRMC: Fix Time: 19222 12:37:11 Lat: 57.40.431401, Long: 12.0.831660 Speed: 0