Send 5v Signal to Raspberry Pi 3 from Pixhawk 2.1 through Mission Planner

I’m working on a fixed wing Aircraft now with Pixhawk 2.1 and I’m facing trouble trying to send 5v signal that is regulated to 3.3v from AUXOUT1 on the pixhawk to Raspberry Pi 3 from Mission Planner’s Trigger Camera Now without any MAVLink or Serial Communication.

My wiring is Pix AUXOUT1 Ground connected to Pi3 Ground
Pix AUXOUT1 Signal connected to Pi3 GPIO pin
with normal GPIO read code which actually works as I’ve tried connecting direct 3.3v.

Please reply ASAP!
Thanks in advance! :slight_smile:

I’m confused. Can you take a step back and explain what you’re trying to achieve?