Blheli32 pass through not working on CUAV V5 Nano but working on CUAV V5

ArduCopter Copter 4.2
1

@andyp1per

I have hobbywing blheli32 4 in 1 esc on CUAV v5Nano
and set SERVO_BLH_AUTO = 1.
Trying to connect to Blheli32 suite software but its not connecting and says failed to connect to flight controller.

But same set-up connect with Cuav v5 flight controller and i can configure the esc.

Both flight controller loaded with AC 4.2.2.

2

I think v5 Nano has level shifters so that passthrough will not work

3

Thank you for your clarification.
By the way what level shifter it is and how does work with v5 nano for future if any possibility?

4

Its a way of protecting the PWM outputs from voltage spikes but it prevents communication the other way