RC transmitter and receiver not communicating

Hello all,
I am building a drone using Raspberry Pi, and Navio2 flight controller. I have bound my RC transmitter and receiver. However, when I try configuring the radio calibration on the Mission Planner App, none of the green bars are filling up.

Here are some photos of my setup:


— I am using a Flysky FS-i6 RC transmitter (Protocol AFHDS 2A, 2.4 GHz)


— This is the receiver (Protocol AFHDS 2A)

Again, I was able to bind the transmitter and receiver.


— The receiver is connected to the PPM/SB ports on the Navio2 as shown in this image.


— However, when doing Radio Calibration on Mission Planner, none of the green bars seem to be lighting up, indicating the transmitter and receiver are not communicating with one another.

However, when doing Radio Calibration on Mission Planner, none of the green bars seem to be lighting up, when moving RC transmitter nodes.

Hi Sheehan,

It seems that Navio2 doesn’t recognize the signal of the RC receiver. Can you please show me how is it connected to the servo rail?