BLHeli Pass through for px4

I have an aircraft with a pixhawk mini and cicada 30a BLHeli ESCs. I want to calibrate the ESCs and flash them with latest firmware so I can get the quad in the air. I tried using all the pass throughs with BLHelli suite to connect my FC to the ESCs. Did not work though. “Loaded” infinitely or stopped responding all the time.

How do I approach this problem. I will be using q ground control as a mission planner and intend to have PX4 flashed. Am a n00b with PX4 so all help appreciated.

Thanks in advance! :slight_smile: