Raspberry Pi to Arduino firmata PWM

[Ch3fk0ch88]

Hello,
i just a Raspberry Pi 3b+ witch is connected to a MEGA 2560.
I want to controll the Mega 2560 with Node-Red which is installed at the Pi to change the speed of PWM Fans.
The Problem is that i need a frequency of 25kHz, is there a way to change it?

Thanks

[Ch3fk0ch88]

Can Nobody help me?

[monteslu]

take a look at my comment on this issue: #31

[Ch3fk0ch88]

I did before i posted this.
But this only works at these Beaglebone things.
I have no idear how i can do it on the Raspberry.
Installing the Beaglebone-io and than change the pwm frequency dont work.

[monteslu]

Do you want to do it on the pi or on the connected arduino? Arduino doesn't let you change the frequency: https://www.arduino.cc/reference/en/language/functions/analog-io/analogwrite/

The raspberry pi itself has 2 PWM pins, but I'm not sure if it's possible to change that frequency either

[Ch3fk0ch88]

I controll the Arduino with the Pi,
so i think i have to change the frequency at the Arduino.

It is really not possible to change the frequency of the Arduino?

[monteslu]

Correct. You can't change it in Arduino.

[Ch3fk0ch88]

And when i change it in the Pi it not change the Output of the Arduino...
Crap---

[Ch3fk0ch88]

It is possible to change the frequency in the Firmata.
I just still not find a way how to change it to 25kHz, just 31kHz etc.