Can I get more than 2 mavlink connections out of a Pixhawk

Posted by James on November 5, 2015 at 3:08pm

Hi there,

Tried searching and came up with nothing

I have a 3dr radio on telemetry 1, and I have a OSD on telemetry 2.

I just brought a Taranis, and I would like to be able to pump telemetry down the FrSky protocol.

Is there any way to re purpose another UART as a third telemetry connection?

Side note: Is it possible to deliver 16 channels to Copter via SBUS? I see mixed reports.

Regards,

James

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Replies

    • James > Clifton Hipsher November 5, 2015 at 6:44pm

      Yes, I do use Tower, which excellent, thanks for the tip on the phone holder, I have been looking for a way to mount the phone as well as my FPV screen. I am going to buy one of these for my screen: https://evolution3d.com/shop/radio-mounts/deluxe-frsky-taranis-x9d-...

      Hopefully I can get some sort of phone mount going between screen and TX

      Deluxe FrSky Taranis ( X9D / X9D+) LCD Monitor Mount
      Deluxe FPV LCD Mount.. for the FrSky Taranis (X9D/X9D+) Transmitter.. Just snaps on.. Extremely Strong.. Tilt Adjustable.. Quick Release Secure Fit..…
    • Clifton Hipsher > James November 5, 2015 at 8:19pm

      I use a cheap mount from eBay  FPV Monitor Mount .

      It raises the monitor so I have room for the phone...  

      IMG_20150902_130943371.jpg

      20150901_120522.jpg

      IMG_20150924_100625728.jpg

    • James > Clifton Hipsher November 5, 2015 at 10:57pm

      Yes, I have the same mount. Not super impressed with it to be honest, it does the job but I want to get the evolution one so that i can take the monitor on and off easily and be able to adjust the angle easily.

      I just ordered a cheap phone mount which i can hopefully hack onto the tx somehow

    • Clifton Hipsher > James November 6, 2015 at 2:43am

      James,

      I looked at different monitor mounts, but I couldn't find one that would coexist with the phone mount.

      It does make the entire rig somewhat unwieldy, and having a strap around my neck was getting uncomfortable, so I got a Tarot tray.

      The tray does the job, and the harness makes things much more comfortable, but I can't use their monitor mount because it interferes with the phone mount...

      I guess in the end its all about compromises and using what works for you.

      Fly safe, and have a great weekend.

      Cliff

  • Chuk Rhodes November 5, 2015 at 4:28pm

    I can confirm similar with Graupner SUMD, and Hott Telemetry on Serial 4. Support for that specifically seems new and incomplete.

    I have got 16 channels in to show up with SUMD. And there is this :

    #define SBUS_INPUT_CHANNELS    16

    #define SUMD_MAX_CHANNELS    32

    But then there is this :

    #define PX4IO_RC_INPUT_CHANNELS        18
    #define PX4IO_RC_MAPPED_CONTROL_CHANNELS        8 /**< This is the maximum number of channels mapped/used */

    On the console shell, "px4io status" will tell you what is receiving.

    • James > Chuk Rhodes November 5, 2015 at 4:44pm

      So it receives 16 channels but they are not usable? I understand that plane allows this.

      It would be awesome to be able to assign more channels to autopilot functions, and to have more channels available for the 7/8 options.

    • Chuk Rhodes > James November 5, 2015 at 7:10pm

      It's hard to say... With latest Copter (master branch) and Mission Planner (beta download), under Full Parameter Tree there are RC1 thru RC14, but they don't seem to support all the Channel 7/8 options.

      Not sure about earlier versions, cause I need the latest for SUMD. But I might get to testing some of that this weekend. I just recently upgraded from 6 channels, so just having 7/8 options is good enough for now. My TX is 12 channels, but it can set to 16 channel mode, and at a very low level Pixhawk shows 16 channels of values.

      I'm sure the 32 channels in SUMD code is just protocol support, it's needed just to handle the checksums. But I see no reason for not having Channel 7-16 options.

This reply was deleted.