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    LTE - Modem Works But Cannot Ping

    Cellular Modems
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    • 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)

                        / #

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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
                            • derrick0799D
                              derrick0799 @tom
                              last edited by

                              @tom I think my problem was that the wifi was connected when I ran the voxl-modem-start.sh
                              Now that I am connect with adb everything started working when I re-ran voxl-modem-start.sh. It is pinging as it should.

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                              • 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:1472332 errors:0 dropped:0 overruns:0 frame:0
                                TX packets:1472332 errors:0 dropped:0 overruns:0 carrier:0
                                collisions:0 txqueuelen:0
                                RX bytes:155328799 (148.1 MiB) TX bytes:155328799 (148.1 MiB)

                                wwan0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
                                inet addr:100.76.95.21 P-t-P:100.76.95.21 Mask:255.255.255.252
                                UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
                                RX packets:2 errors:0 dropped:0 overruns:0 frame:0
                                TX packets:2713 errors:0 dropped:0 overruns:0 carrier:0
                                collisions:0 txqueuelen:1000
                                RX bytes:612 (612.0 B) TX bytes:1304344 (1.2 MiB)

                                / # ping 8.8.8.8
                                PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
                                64 bytes from 8.8.8.8: icmp_req=1 ttl=113 time=34.3 ms
                                64 bytes from 8.8.8.8: icmp_req=2 ttl=113 time=35.1 ms
                                64 bytes from 8.8.8.8: icmp_req=3 ttl=113 time=34.0 ms
                                64 bytes from 8.8.8.8: icmp_req=4 ttl=113 time=27.1 ms
                                64 bytes from 8.8.8.8: icmp_req=5 ttl=113 time=31.1 ms
                                64 bytes from 8.8.8.8: icmp_req=6 ttl=113 time=36.5 ms
                                64 bytes from 8.8.8.8: icmp_req=7 ttl=113 time=24.0 ms

                                Thanks @Tom

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                                • tomT
                                  tom admin
                                  last edited by

                                  @derrick0799 Great to hear!

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

                                    Problem solved for me too! I think it was also the wlan0 being up. Thanks a lot for the support @tom

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

                                      @vmassague Awesome!

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