Airspeed (synthetic) not being reported in Plane 3.8?

Posted by Henry Wurzburg on January 7, 2018 at 6:20pm

I just installed 3.8 on a pixhawk without AS sensor and was surprised to find that Airspeed (synthetic since I have no sensor) was not being reported over Mavlink to my OSD....I am pretty sure that on a 3.4 APM system I had, it was being reported and the OSD displayed it....its been a while since I have built a system without a Pitot sensor....is this something that changed since 3.4?

I know its computed or nav x-track wouldnt work nor stall prevention....so why is it not reported now?

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Replies

  • 100KM
    Hein du Plessis January 15, 2018 at 3:13am

    Hi Henry

    Thank you so much for this! I'm going to implement on my planes now.

    Regards,

    Hein

    vlcsnap-2018-01-10-10h03m21s370.jpg

  • Henry Wurzburg January 14, 2018 at 1:32pm

    This is resolved. I guess its really a Mission Planner issue. As of Plane 3.8, a new param ASPD_TYPE was added to select type. MP defaults to one type of sensor, in fact, it does not even allow NO SENSOR, although a 0 in ASPD_TYPE is what is needed for those setups. So, in my case, its reading a floating pin and returning 0, which also makes stall prevention mute. Once I set the param to 0 , synthetic airspeed is being displayed (and hopefully used in stall prevention).

    I requested a fix or enhancement to Mission Planner to keep other with no sensor from falling down this hole. Default or unconfigured should be NO sensor.

  • 100KM
    Hein du Plessis January 10, 2018 at 12:05am

    I've now re-checked my DVR, you're right NO AIRPSEED! See image.

    vlcsnap-2018-01-10-10h03m21s370.jpg

  • Henry Wurzburg January 8, 2018 at 5:24am

    This one: version 942 https://github.com/night-ghost/minimosd-extra/blob/master/CHANGELOG.md

    night-ghost/minimosd-extra
    Full rework of minimosd-extra with lots of news. Contribute to night-ghost/minimosd-extra development by creating an account on GitHub.
  • 100KM
    Hein du Plessis January 7, 2018 at 10:27pm

    That's strange - I've been using 3.8.3 for a bit and it seems to work ok. What version of OSD are you using ?

This reply was deleted.