Discussions

APM MavLink to FrSky X8R S.Port converter

Posted by Rolf Blomgren on January 24, 2014 at 8:03am

Hi all,

I just bought an FrSky Taranis for my quad copter and needed to get the Mavlink data up on the Taranis LCD telemetry display. So here is my solution using a Teensy3.1 as a converter between MavLink and the S.Port on FrSky X8R.

See attached file below...

MavLink_FrSkySPort_1.3.zip

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Replies

- - - - vincent callemyn > Stuart Brookes January 24, 2015 at 4:51am
        
        ok so for the moment it is not reliable ...
        could you tell us if you can make it work with the teensy?
        
        thank you
        
        Stuart Brookes > vincent callemyn January 24, 2015 at 5:11am
        
        yeah sure no worries.
        
        Wolke > Stuart Brookes January 24, 2015 at 7:11am
        
        comment line 15 in FrSkySPort.h. this disable FVLSS in teensy code. thats all. IMO, than you have no trouble with external frsky FVLSS sensor usecase.
        
        /g
        
        wolke
        
        Euan Ramsay > Wolke January 28, 2015 at 12:00pm
        
        Confirmed - FVLSS works as normal, but I get no voltage readings from the APM PM. I do get current, but not voltage. Would love to know how to get voltage from the PM.
        
        Stuart Brookes > Euan Ramsay January 28, 2015 at 2:12pm
        
        ah ok....I confused you with someone who replied to me before. Without FVLSS the defaulr 1.3 teensy code should show volts if you are using a pm. Are you getting Volts in your log files?
        
        Euan Ramsay > Euan Ramsay January 28, 2015 at 2:08pm
        
        Because one of the advantages of this solution is the reduced weight, price and complexity it offers over buying genuine frsky components. It also means nothing to add to balance ports, which is an easy step to forget.
        
        Stuart Brookes > Euan Ramsay January 28, 2015 at 12:28pm
        
        Why not use the FLVSS voltage (cells)?
        
        I can't read the APM volatage at the same time as current using a VR Ubrain, hence my using the FVLSS in the first place.
        
        Stuart Brookes > Wolke January 24, 2015 at 7:21am
        
        Cheers Wolke, my bodge seems to work after doing some testing, but will do it your way next time I look at it.
Tracy DeWitt January 23, 2015 at 4:51pm

Could someone tell me how to get altitude in feet. When I change the taranis to imperial units T1 and T2 get screwy numbers. I think it is converting celsius to Fahrenheit. I have the original code on my teensy the 1.2 Any help would be great.
- Tracy DeWitt > Tracy DeWitt January 23, 2015 at 6:26pm
  
  Actually I do get the altitude in feet with taranis set to imperial. Its the T1 and T2 that I believe need to be converted to Celsius in the teensy code. Then I think the T1 armed and T2 Gps lock would read correctly. My problem is I have no idea how to write code. Celsius - 32 times .5556= Fahrenheit. Or am I going about this wrong.