VOXLFlight LTE modem

  • Hi,
    I have several questions:

    1. What's reason that by voxl-inspect-services I see, that :
      are in "Not running" state, while the services were configured and I received "approving for it enabling and starting" -
      "enabling voxl-qvio-server systemd service
      starting voxl-qvio-server systemd service
      Done configuring voxl-qvio-server"

    2)How could i know if voxl flight is LTE server or client?

    3)Is it possible to configure LTE v2 modem except of "voxl-configure-modem"?(AT commands)


  • Hi,

    If the voxl services were marked as enabled but not running that means that they were stopped for one of two reasons: A) you ran them manually in a terminal window which killed the background process since only one instance can run at a time or B) they encountered some sort of error. If the ran into an error you can check the output logs from the services using journalctl -u voxl-qvio-server or journalctl -u voxl-vision-px4. If they crashed due to an error, the info as to why will be there and posting those logs will allow us to help further.

    I can't speak to the modem configuration stuff but i'll ping someone who can.



  • Dev Team

    @relevinsky For voxl-modem depending on what configuration is set up, the background service may exit. This could be due to a failure, or it may be a successful exit if it finished running everything it needed to.

    Once the modem is brought up, you can send AT commands to /dev/ttyUSB2 using something similar to:

    echo -ne "AT+QENG=\"servingcell\"\r" | busybox microcom -t 1000 /dev/ttyUSB2

    This exact AT command isn't supported on Sierra modems but using this same format of piping a command to microcom will work.

    Here is a link to a Sierra doc about which AT commands are supported on 76** modems: https://source.sierrawireless.com/resources/airprime/software/airprime_wpx5xx_wp76xx_wp77xx_at_command_reference/

  • @Alex-Gardner said in VOXLFlight LTE modem:

    journalctl -u voxl-qvio-server

    Thank you for your answer.
    I found a problem:
    "loading qvio config file
    Error in json_read_file while parsing file /etc/modalai/voxl-qvio-server.conf"
    I made only voxl-configure-qvio ,the broken file is created after that (i think)
    Could you help me to solve a problem?

  • @tom
    Thank you.
    How could i know wherever voxl flight is LTE server or client?

  • Dev Team

    @relevinsky What do you mean by LTE server / client? LTE is a cellular technology that will provide your Voxl flight with Internet access.

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