MR60

How to assign a receiver channel as a pass-thru Pixhawk ?

Posted by Hugues on February 16, 2014 at 3:14am

Hi,

I would like to configure two radio channel of my receiver to pass-through Pixhawk on its RC aux channels (that is the RC9 to RC14 aux PWM outputs).

I found in mission planner the RCx_FUNCTION parameter which allows to define that RCx will be used as a pass-through output. But the question is how do you allocate which receiver channel will be passed through it ?

Thx

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Replies

    • MR60
      Hugues > Hugues March 21, 2014 at 4:05pm

      Looked at flytron but they do not have Jr/Taranis compatible modules.

      Not sure about the legality of 868 MHz in Europe; why do you ask?

    • Artem > Hugues March 21, 2014 at 2:28pm

      nope, I'm using 915mhz

      http://www.fpvmodel.com/dtf-uhf-deluxetx-transmitter-433mhz-openlrs...

      unfortunatelly JR module version doesn't have filtering. 

      flytron people are in Europe: http://www.flytron.com/16-openlrs

      are you allowed to use 868mhz in Europe? 

    • Brian Sigmon > Hugues March 21, 2014 at 8:03am

      I have a Pixhawk with the SBUS input.  I configured the X8R in mode 4 (bind with jumpers between CH1&CH2, CH3&CH4 on the receiver)

      Mode 4 configures the 8 Servo outputs on the X8R to be channels 9-16 plus telemetry is enabled.  The Pixhawk picks up channels 1-8 from the SBUS signal.  Pixhawk uses channels 1-8, the X8R routes channels 9-16 to the servo channel outputs on the X8R receiver so those channels can be used for normal servo outputs.  On the X8R receiver 1 becomes 9, 2 becomes 10, etc.

      For my setup I only need 1 X8R.  I'm using channels 9-16 to control a camera gimbal, video switch, LEDs, etc.

    • Ben Anderson > Brian Sigmon July 22, 2015 at 9:32pm

      Brian I have a flysky th9x with frskh xjt module and x8r. Can you point me in the direction on how to add camera gimbal tilt and fpv camera switcher?  With the 9x can I connect the switch and gimbal into the x8r like you mention?  I'm new to this and struggling to get this all hooked up. I have a pixhawk. Any help?  The 9x is on stock firmware. 

    • Oskar Atkinson > Brian Sigmon March 19, 2015 at 7:39am

      great info.

      may I ask what are you using to convert the servo channel output into a "switch".

      Something like this https://www.servocity.com/html/micro_pwm_switch__10amp_.html#.VQrf0...

      for each channel ?

      Thanks

      Oskar

    • Ritche M > Brian Sigmon June 9, 2014 at 10:24pm

      thank you for this information!

    • MR60
      Hugues > Brian Sigmon March 21, 2014 at 11:20am
      Thx a lot
    • Emin Bu > Artem March 20, 2014 at 1:55pm

      Artem,what about Graupner MX20 with gr24 rx?

    • Artem > Emin Bu March 20, 2014 at 2:17pm

      does it have a dedicated ppm port? if so, you should be able to grub pwm from the pwm pins simultaneously with ppm feed to your fc.  if no, than get a ppm-pwm converter, put y harness before it. this way you will have ppm and pwm for the same channels. I think it is better to keep FC to do only a singe task of control the aircraft/providing telemetry and control all the peripherals with another board or directly with the RC to take off any additional stress/work on the FC, thus providing more timing for crucial operations. 

      EDIT:

      or get FrSky Taranis with DTF UHF :) 

    • Emin Bu > Artem March 21, 2014 at 4:17am

      Artem,yes it does have PPM  port,so I just grub PWM from PWM channel 9 and 10 for example(I have 12 channel in total) for pitch and pan control of my AlexMos 3ax gimbal controller

      here is how everything should look

      Simimple BGC  3.0.0  (322bit) connection diagram

      SimpleBGC_32bit_Connection_Diagram.pdf

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