PPM signal are not received by Navio+ with 20170323 image

Hi, I wish to reuse a Navio+ on a new UAV, this time will be a fix wing (a plane) but Navio+ didn’t receive PPM signal from the RX (FrSky D8R-XP). So my question is I have to set something with the new image(20170323)?
Troubleshooting done:
Scope on RX out (PPM signal on screen)


Scope on Navio+ PPM in PIN (PPM signal on Screen)


Already run the Navio+ Examples on https://docs.emlid.com/navio/navio+/dev/rc-input/ (no PPM signal was converted on PWM). [It was installed the pigpio library]
Thks for your answers

Hello there!

Could you hook up the scope to the Navio+ header to eliminate the possibility of a loose contact? We need to be sure PPM signal is propagated to the header and doesn’t get lost somewhere.

Hi @george.staroselskiy
Thanks for the tip, I just hook up the scope on Header


then I powered on the Navio±RPi2 on servo rail.
On the scope there are 3 signals
Yellow(signal from RX D8R-XP)
Purple(signal on Navio+ PPM Pin)
Cian(Voltaje Level)


But Unfortunately there is not response for RC Calibration on mission planner tab.

:disappointed:
Could you check if something on the code is not allowing receive signal from RX.
Thks.

Could you please run emlidtool?

Hi @george.staroselskiy
This is the output of sudo emlidtool


By the way, I put some foam on the sensor as well and the outcome was the same. :confused:

I’m interested in the output of sudo i2cdetect -y 1, dmesg and cat /boot/config.txt. You can try lowering i2c_baudrate to 400000 and see if it helps.

Hello,
I use the navio2 and have the same problem with the latest image.
When i change the SD card with the older image, all works fine !
The RC input channels stay alway to "0"
Hardware is OK for sure !

SOLVED

We have to choice nr 3 in the setup for the NAVIO2 !!! and not 1 …

how? how you solved? what nr 3 or 1?