Hi everyone!

I’m working on my first ever build. I’m using the parts from the tyro 79 and installing them on the reptile cloud 149hd frame.
I have a question about connecting my frsky r-xsr receiver. Since the harness connections that came with the receiver don’t match the connection on the flight controller, can I just pop the pins and pull the wires from the black receiver connector and reinsert them into the white connector that came with the tyro kit? Or how would I go about connecting the r-xsr? I have no idea what I’m doing!
(Hope that makes sense, I included a photo to give you an idea of where I’m at. Thanks for any help!)

You should have got two wiring harnesses with the R-XSR - a 3-wire "servo" harness, and a 5-wire flight controller connection harness. The 3-wire harness is predominantly used for connection to a PWM module on a wing, or for flashing new firmware to the R-XSR. To connect to the FC you should use the 5-wire harness which has no plug on the other end, so you have two options:-

1. Solder/splice the wires on the Typo79 receiver harness together with the relevant wires on the 5-wire R-XSR harness.
   
   
2. Don't use the socket on the Tyro79 flight controller, but instead just solder the relevant wires from the 5-wire R-XSR harness to pads on the Tyro79 FC which correspond with the pins in the receiver socket.
   

(29-Jan-2020, 02:19 PM)SnowLeopardFPV Wrote: You should have got two wiring harnesses with the R-XSR - a 3-wire "servo" harness, and a 5-wire flight controller connection harness. The 3-wire harness is predominantly used for connection to a PWM module on a wing, or for flashing new firmware to the R-XSR. To connect to the FC you should use the 5-wire harness which has no plug on the other end, so you have two options:-

1. Solder/splice the wires on the Typo79 receiver harness together with the relevant wires on the 5-wire R-XSR harness.
   
   
2. Don't use the socket on the Tyro79 flight controller, but instead just solder the relevant wires from the 5-wire R-XSR harness to pads on the Tyro79 FC which correspond with the pins in the receiver socket.
   

Option 1 seems like the easier way to go for someone like me who isn’t sure what they are doing and doesn’t have a lot of experience soldering.
With that said, since the Tyro receiver harness only has three wires, will it be ok to simply remove the extra 2 wires from the r-xsr harness?

Yes, you can remove the 2 wires you don't need. I would pull the wires out by lifting the tab that locks them into place instead of just cutting them off. Save the wire just in case you might need them in the future.

If you take the splicing option, obviously don't forget to use use some heatshrink tubing over the joints for insulation.

Yes, you can just remove the other 2 wires from the plug. Rather than cutting them off, lift up the tab on the plug which holds the pin in and just slide it out.

Unless you want telemetry data on your transmitter, the easiest wiring option on the Tyro79 FC is to just use the 3-wire SBUS protocol connection method. S.Port or FPORT on the Tyro79 board is do-able, but is more complex and a lot more fiddly which requires you to bypass the socket on the R-XSR and solder direct to a minuscule pad on the R-XSR.

Assuming that your transmitter is an ACCST one and not ACCESS, make sure you have the latest pre-2.x.x version of the ACCST D16 SBUS/S.Port firmware flashed to the R-XSR (either EU-LBT or FCC depending on your region). DO NOT install the 2.x.x version (see HERE for the reason why).