Get PWM out, even by sacrificing other functionality

[tarajas]

Hi,

I have a 1.2.4 version A4 board and I was wondering if there are some quick and dirty adjustments to be made potentially even with some small amount of soldering to get a PWM output on the board maybe?

Like I could sacrifice the 433MHz related functionality for examle?

Is there maybe such a modification?

Thanks for the help in advance

[admin]

if you don't use 433M or IR pins, you can use two pins conenct with a PCA9685 PWM i2c bus output module. just use for SDA and SCL pins.

[tarajas]

Thank you very much for the answer!

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I guess the PWM level from this setup will match the logic level of the ESP32 3.3V right?

So if I want 5V PWM then I need tk get an LLC after the generated PWM signal as well am I right? And feed that with 5V...

[admin]

just add a convert circuit, switch to 5v level. ESP32 is 3.3v level.

[tarajas]

Thanks, okay.

[tarajas]

Hi,

Luckily I have checked and maybe I can get by with analogue DC control 0-5V.

The BLDC fans I use seems to accept analogue DC instead of PWM.

One question in relation to this:

The KCS firmware does not really offer dynamic control of fan rpm based on temperature right?

Like a PID thermostat for example... for that one needs to write code or use esphome right?

[admin]

KCS not support that, you can use ESPHome.

[tarajas]

Thanks, okay.