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    Streaming video over LTE

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    • Chad SweetC
      Chad Sweet ModalAI Team
      last edited by

      If the VOXL is connected to a VPN via LTE, then you should use the VOXL's endpoint IP as the RTSP video server for a video client (QGC, VLC, etc) connected to the same VPN. voxl-rtsp would be one way to stream the video

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      • Aldo Castro FreireA
        Aldo Castro Freire
        last edited by

        Hi Chad, how do I change the endpoint for the voxl-rtsp I think right now is only sending to the local area network 192.168.8.1. I am not sure of where to change that ?

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        • Aldo Castro FreireA
          Aldo Castro Freire
          last edited by

          Nevermind As long as the setup is fine, the rtsp will send it using the LTE.
          PS: you need to connect your local machine to the VPN also.

          Now my question is: is this the order I must follow To allow streaming over LTE I have to connect to the VPN and then start streaming ? is there a way to set up a script to activate like a minute after LTE connection is established to connect to the VPN and then start streaming. Otherwise, if I start streaming before I connect to the VPN it won't work. ? if so is there documentation on how to write a service?

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

            It's a standard Linux service, take a look at the voxl-modem service for an example

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            • tomT
              tom admin @Aldo Castro Freire
              last edited by

              @Aldo-Castro-Freire The services that we use to start LTE and VPN on bootup are voxl-modem, as Chad mentioned, voxl-time-sync which is a simple script which loops until the date / time is correct, meaning a connection to the internet has been established, and voxl-vpn, which will then start the OpenVPN service after voxl-time-sync has finished.

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              • Aldo Castro FreireA
                Aldo Castro Freire
                last edited by

                Does voxl-vpn works with the new version of openvpn because I update mine to the 2.4.6

                Also is this a service? Or does voxl-vpn sets up the service as voxl-configure-modem does? I haven't seen anu documentation for voxl-vpn.

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                • tomT
                  tom admin
                  last edited by

                  voxl-vpn is just a wrapper for calling OpenVPN, it's not required, you can use OpenVPN on its own. We haven't tested with 2.4.6 but I don't see why it wouldn't work. All you should need to do is modify the key path in the service file.

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                  • Aldo Castro FreireA
                    Aldo Castro Freire
                    last edited by

                    Okay. So basically use voxl-modem.service as a sample and exec voxl-vpn instead voxl-modem-start.sh .And start this service after voxl-modem.service

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                    • tomT
                      tom admin
                      last edited by

                      All the voxl-modem.service does is call voxl-modem-start.sh.

                      So what I would recommend and what works for us is:

                      Start voxl-modem service -> Gets LTE connection up and running
                      Start voxl-time-sync sevice -> Verifies connection to internet
                      Start vpn-start service -> Connects to VPN

                      If you have all three of these enabled they should start at the correct times to get you going.

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                      • tomT
                        tom admin @tom
                        last edited by

                        @tom OpenVPN will fail if the date / time is not set correctly, that is why we use voxl-time-sync to have OpenVPN wait until the date / time is correct. This sometimes takes a couple seconds after the modem has connected to the network

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                        • Aldo Castro FreireA
                          Aldo Castro Freire
                          last edited by Aldo Castro Freire

                          Is there a command called vpn-start? I cannot find it in my voxl. Or should I make a script that opens the vpn?

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                          • tomT
                            tom admin
                            last edited by tom

                            vpn-start is a service file that you can find at /etc/systemd/system/vpn-start.service. You can modify the KEY_FILE parameter with the path to your OpenVPN key file and enable the service using systemctl enable vpn-start.

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                            • Aldo Castro FreireA
                              Aldo Castro Freire
                              last edited by

                              Hi is there an easy way to open and read a file in Voxl such as nano and vim ?? it is a pain to have to transfer files between machines

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                              • tomT
                                tom admin
                                last edited by

                                Yes you can use vi on VOXL

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