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    LTE - Modem Works But Cannot Ping

    Cellular Modems
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    • vmassagueV
      vmassague
      last edited by

      I am getting the exact same issue, with the same log output.

      adb shell systemctl status -l voxl-modem
● voxl-modem.service - Modem Initialization
   Loaded: loaded (/etc/systemd/system/voxl-modem.service; enabled; vendor preset: enabled)
   Active: inactive (dead) since Thu 1970-01-01 00:00:57 UTC; 2s ago
  Process: 3178 ExecStart=/usr/bin/voxl-modem-start.sh (code=exited, status=0/SUCCESS)
  Process: 2312 ExecStartPre=/bin/sleep 2 (code=exited, status=0/SUCCESS)
 Main PID: 3178 (code=exited, status=0/SUCCESS)

Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: ]
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Successfully registered with the network
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Starting network
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Checking connection status
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Connection is up
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Using the DHCP client to get an IP address
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: udhcpc (v1.23.2) started
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Sending discover...
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Sending select for 10.107.157.92...
Jan 01 00:00:57 apq8096 voxl-modem-start.sh[3178]: Lease of 10.107.157.92 obtained, lease time 7200

      I validated that the SIM works and has data with a cellphone.
      I am using an m500 with LTE v2 modem for Europe.

      1 Reply Last reply Reply Quote 0
      • derrick0799D
        derrick0799
        last edited by

        Ok. I wasn’t sure if I was missing a step in setting this up. I too have verified that the SIM card works and receives data in a different device. I have the V2-Modem, WP7610 Sierra Wireless. I am also connecting to the Verizon “vzwinternet” APN if this detail would further help understand my issue.

        tomT 1 Reply Last reply Reply Quote 0
        • Chad SweetC
          Chad Sweet ModalAI Team
          last edited by Chad Sweet

          This type of issue is typically related to APN mismatch with the carrier's specific APN. For "vzwinternet" the carrier is Verizon

          Double checking folks see this doc as well https://docs.modalai.com/lte-v2-modem-manual/

          1 Reply Last reply Reply Quote 0
          • vmassagueV
            vmassague
            last edited by

            In my case, I double-checked with the cellphone to have the same APN since I am using a custom one, but still no success. I tried with two different modules and VOXL boards.

            FYI, I am connecting the LTE antennas one in Antenna (main) and the other to Antenna (diversity)

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            • tomT
              tom admin @derrick0799
              last edited by

              @derrick0799 Are you using the LTE V2 Add-on or Stand Alone?

              derrick0799D 1 Reply Last reply Reply Quote 0
              • tomT
                tom admin
                last edited by tom

                @vmassague Are you using the LTE V2 Add-on or Stand Alone? And you're using the Sierra 7607 modem correct?

                vmassagueV 1 Reply Last reply Reply Quote 0
                • derrick0799D
                  derrick0799 @tom
                  last edited by

                  @tom, I am using the add-on

                  tomT 1 Reply Last reply Reply Quote 0
                  • vmassagueV
                    vmassague @tom
                    last edited by

                    @tom I'm using the Add-on also and I'm using the Sierra 7607

                    tomT 1 Reply Last reply Reply Quote 0
                    • tomT
                      tom admin @derrick0799
                      last edited by

                      @derrick0799 Can you disable the voxl-modem service from running with systemctl disable voxl-modem and reboot your voxl.

                      Then run voxl-modem-start.sh manually so I can see the full output?

                      derrick0799D 2 Replies Last reply Reply Quote 0
                      • tomT
                        tom admin @vmassague
                        last edited by

                        @vmassague Can you disable the voxl-modem service from running with systemctl disable voxl-modem and reboot your voxl.

                        Then run voxl-modem-start.sh manually so I can see the full output?

                        1 Reply Last reply Reply Quote 0
                        • derrick0799D
                          derrick0799 @tom
                          last edited by

                          @tom, sure. It will be later this evening before I am able to do so.

                          tomT 1 Reply Last reply Reply Quote 0
                          • tomT
                            tom admin @derrick0799
                            last edited by

                            @derrick0799 @vmassague Another thing for both of you to check is to see if the APN is indeed set correctly, you can do this with the following command:

                            / # echo -ne "AT+CGDCONT?\r" | busybox microcom -t 1000 /dev/ttyUSB2
AT+CGDCONT?
+CGDCONT: 1,"IP","h2g2","0.0.0.0",0,0,0,0
+CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
+CGDCONT: 3,"IPV4V6","sos","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1

                            In this case, my APN is h2g2 for GoogleFi

                            derrick0799D 1 Reply Last reply Reply Quote 0
                            • derrick0799D
                              derrick0799 @tom
                              last edited by

                              @tom I ran 'systemctl disable voxl-modem' and reboot voxl then...
                              yocto:~$ voxl-modem-start.sh

                              VOXL detected...

                              Initializing v2 modem...

                              Waiting for ttyUSB2...
                              ttyUSB2

                              Initalizing cellular connection...
                              Configuring GPIO to pull modem out of reset
                              Waiting for the diag serial port(/dev/ttyUSB0) to activate
                              checking for serial port: /dev/ttyUSB0
                              /dev/ttyUSB0 is available
                              Verifying existence of QMI port(/dev/cdc-wdm0)
                              checking for serial port: /dev/cdc-wdm0
                              /dev/cdc-wdm0 is available
                              Unstick QMI countdown: 10
                              Unstick QMI countdown: 9
                              Unstick QMI countdown: 8
                              Unstick QMI countdown: 7
                              Unstick QMI countdown: 6
                              "12253379280"
                              Checking for system registration
                              Attempt: 1
                              {
                              "registration": "registered",
                              "plmn_mcc": 311,
                              "plmn_mnc": 480,
                              "plmn_description": "Verizon ",
                              "roaming": false
                              }

                              response: [{
                              "registration": "registered",
                              "plmn_mcc": 311,
                              "plmn_mnc": 480,
                              "plmn_description": "Verizon ",
                              "roaming": false
                              }
                              ]
                              Successfully registered with the network
                              Starting network
                              "No effect"
                              Checking connection status
                              Connection is up
                              Using the DHCP client to get an IP address
                              udhcpc (v1.23.2) started
                              Sending discover...
                              Sending select for 100.68.239.240...
                              Lease of 100.68.239.240 obtained, lease time 7200

                              1 Reply Last reply Reply Quote 0
                              • derrick0799D
                                derrick0799 @tom
                                last edited by

                                @tom said in LTE - Modem Works But Cannot Ping:

                                echo -ne "AT+CGDCONT?\r" | busybox microcom -t 1000 /dev/ttyUSB2

                                yocto:~$ echo -ne "AT+CGDCONT?\r" | busybox microcom -t 1000 /dev/ttyUSB2
                                AT+CGDCONT?
                                +CGDCONT: 1,"IP","vzwinternet","0.0.0.0",0,0,0,0
                                +CGDCONT: 2,"IPV4V6","ims","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,0
                                +CGDCONT: 3,"IPV4V6","sos","0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0",0,0,0,1

                                OK

                                tomT 1 Reply Last reply Reply Quote 0
                                • tomT
                                  tom admin
                                  last edited by

                                  @derrick0799 Do you have WiFi connected? If so, try disabling it with ifconfig wlan0 down and seeing if you can then ping.

                                  Also, can I see the output of route -n?

                                  Same for you @vmassague something to try.

                                  derrick0799D 1 Reply Last reply Reply Quote 0
                                  • tomT
                                    tom admin @derrick0799
                                    last edited by

                                    @derrick0799 Looks like APN is setting correctly so that's good

                                    1 Reply Last reply Reply Quote 0
                                    • derrick0799D
                                      derrick0799 @tom
                                      last edited by

                                      @tom after disabling wlan0,
                                      / # ping 8.8.8.8
                                      connect: Network is unreachable

                                      / # route -n
                                      Kernel IP routing table
                                      Destination Gateway Genmask Flags Metric Ref Use Iface
                                      172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
                                      / #

                                      1 Reply Last reply Reply Quote 0
                                      • tomT
                                        tom admin
                                        last edited by

                                        @derrick0799 What does ifconfig show?

                                        derrick0799D 1 Reply Last reply Reply Quote 0
                                        • derrick0799D
                                          derrick0799 @tom
                                          last edited by

                                          @tom
                                          / # ifconfig
                                          docker0 Link encap:Ethernet HWaddr 02:42:77:DF:4E:80
                                          inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
                                          inet6 addr: fe80::42:77ff:fedf:4e80/64 Scope:Link
                                          UP BROADCAST MULTICAST MTU:1500 Metric:1
                                          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
                                          TX packets:2 errors:0 dropped:0 overruns:0 carrier:0
                                          collisions:0 txqueuelen:0
                                          RX bytes:0 (0.0 B) TX bytes:140 (140.0 B)

                                          lo Link encap:Local Loopback
                                          inet addr:127.0.0.1 Mask:255.0.0.0
                                          inet6 addr: ::1/128 Scope:Host
                                          UP LOOPBACK RUNNING MTU:65536 Metric:1
                                          RX packets:609376 errors:0 dropped:0 overruns:0 frame:0
                                          TX packets:609376 errors:0 dropped:0 overruns:0 carrier:0
                                          collisions:0 txqueuelen:0
                                          RX bytes:65142775 (62.1 MiB) TX bytes:65142775 (62.1 MiB)

                                          / #

                                          1 Reply Last reply Reply Quote 0
                                          • tomT
                                            tom admin
                                            last edited by

                                            @derrick0799 Is that the output after running voxl-modem-start.sh?

                                            1 Reply Last reply Reply Quote 0
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