Radio Calibration Issue -ELRS

Dear all,

I am newbie, I just built my first drone and getting stuck on the Radio Calibration, I don’t see green bars on the mission planner.

I am using FC Pixhawk 2.4.8, Receiver ELRS Matex R24D, Transmitter Radiomater Zorro internal ELRS

I noticed the radio and the receiver are bound indicated by solid LED on the receiver and signal bars appeared on the radio display, however the FC doesn’t seem to receive signal from the Receiver.

I connected the Receiver to Telemetry port 1 on the FC ( Rx to Tx and Tx to Rx, Vcc and Ground )

I have configured parameters for Serial 1 as below:

Serial 1 Protocol : 23 (RCIN)

Baud Rate : 115

RSSI Type : 3

RCC Option : 544 (Supress CRSF for ELRS), Use 420 kb ELRS

I would really appreciate your help and guidance to resolve this issue