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    LTE - Modem Works But Cannot Ping

    Cellular Modems
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    • 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/

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        • 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)

          1 Reply Last reply Reply Quote 0
          • 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
                                    / #

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                                    • 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)

                                        / #

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                                        • tomT
                                          tom admin
                                          last edited by

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

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

                                            At that point, you should be seeing something similar to:

                                            wwan0     Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
                                                      inet addr:30.60.23.115  P-t-P:30.60.23.115  Mask:255.255.255.248
                                                      UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
                                                      RX packets:33 errors:0 dropped:0 overruns:0 frame:0
                                                      TX packets:55 errors:0 dropped:0 overruns:0 carrier:0
                                                      collisions:0 txqueuelen:1000 
                                                      RX bytes:3214 (3.1 KiB)  TX bytes:4672 (4.5 KiB)
                                            
                                            derrick0799D 2 Replies Last reply Reply Quote 0
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