The only reason that I was adding a arduino is the control of servo.

It was too difficult to PWM to control servo with Radxa ZERO 3W.

I am giving one more push on PWM on 3W.

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I might have to try Adafruit Blinka Library

* /usr/local/lib/python3.9/dist-packages/adafruit_blinka/microcontroller/rockchip/rk3566/pin.py
 

 

 

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In this library, for Rockchip RK3566, there aren't good PWM setting & only 1 I2C Setting done.

I might try to copy from RK3568's pin.py file to add more PWM pin setting and hope it works.

The file location on : /usr/local/lib/python3.9/dist-packages/adafruit_blinka/microcontroller/rockchip/rk3566/pin.py