Choosing RC receiver

You would need a transmitter and a receiver with PPM output. As per our docs, here are some models:
For ACCST (most FrSky transmitters):

  • FrSky D4R-II 4ch 2.4Ghz ACCST Receiver
  • FrSKY V8R7-SP ACCST 7 Channel RX with composite PPM
  • FrSKY D8R-XP

Can you show me a picture of how this is done? I need to get power to my receiver and not quite sure how I go about doig this.

Clear diagrams are in the documentation.

http://docs.emlid.com/Navio-APM/hardware-setup-navio-plus/#rc-output

Take note that when multiple ESCs with power (traditional/non-“opto” ESCs) are connected, you must remove their power (but not ground) pins from all but one connector, i.e. you only inject one 5v power source along the rail else you will cause problems and potentially damage the Navio.

This may also help:

thanks.

I realized after I asked how to do this that the reason my servo rail wasn’t getting power was because of the ESC’s I was using. The ones I’ve used before would provide power, but I was using the DJI ones which don’t.

Once I bought a BEC, I was able to get power easily enough.

FrSky all the way, use the s.bus to cppm from FrSky. Taranis is what im using with a x8r and the cppm decoder. Best value for your money and is open source.

Hi @mikhailavkhimenia I have 2 recievers:

  • Hitec Aurora 9 2.4GHz A-FHSS
  • FrSky V8FR-II

Can you explain how to connect them to the navio please? I dont see any PPM outputs.

Thanks!

Navio+ will accept PPM, and Navio2 PPM/S.bus so you will need to use a receiver with PPM output. Models that you have listed do not have any of that. You can get a PPM encoder or a different receiver.

Great news here guys I can confirm, something not so obvious when looking at the product pages…

FrSky have released a firmware update for their X4R and X4R-SB compact digital telemetry capable receivers, enabling BOTH CCPM and SBUS side-by-side.

It’s just a firmware update (no special cable needed, just the usual one for flashing) with two pins shorted to enable the functionality. There is no need to switch on or off later then. Once enabled, PWM port 4 remains SBUS (no worries there), but port 1 changes to CPPM. If that was not enough, ports 2 and 3 are STILL available for direct separate use so you can have a total of 10 channels on Navio+ with this receiver!

Of course with Navio 2 this is not necessary as we now have SBUS native support. But this little receiver is now a great choice and if you already installed the SBUS to CPPM converter you can remove it after the update to simplify your wiring.

Just one point of caution, the new LBT firmware does not work with the old internal module firmware. So you also have to follow instructions (and make/get a special cable) to update the internal module of the Taranis.

Furthermore, there is another new receiver on the market from FrSky. The XSR receiver is basically an X4R-SB with the pin headers removed and a smaller (what looks like a DF13) connector in it’s place. It’s priced about 30 euro on Banggood excluding taxes and shipping so this is now THE best compact receiver for Navio in my opinion (it also has both SBUS and CPPM output on the cable!).

X4R-SB “LBT” firmware: http://www.frsky-rc.com/download/view.php?sort=&down=246&file=Firmware-X4R/X4RSB

Receiver upgrade instructions: http://www.frsky-rc.com/download/view.php?sort=&down=121&file=How%20To-S.Port%20Products

Taranis internal transmitter “LBT” firmware upgrade here: http://www.frsky-rc.com/download/view.php?sort=&down=232&file=Firmware-XJT

Transmitter upgrade instructions: http://www.frsky-rc.com/download/view.php?sort=&down=174&file=How-to%20built-in%20XJT%20upgrade

Flash tool used for both receiver and transmitter upgrades: http://www.frsky-rc.com/download/view.php?sort=Tool&down=115&file=Upgrade%20Lite-S.Port%20Telemetry

XSR product page here: http://www.frsky-rc.com/product/pro.php?pro_id=154

Example at Banggood here (currently pre-order): http://www.banggood.com/FrSky-XSR-2_4GHz-16CH-ACCST-Receiver-S-Bus-CPPM-Output-Support-X9D-X9E-X9DP-X12S-X-Series-p-1031481.html

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Ok Thanks! for the moment i am using a PS3 joystick :smile:

Actually you can flash the s.port devices with the Taranis directly, no special cables needed:

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