ESP32 PWM Control Issues with Graupner Speed Profi 40R BEC ESC

Hello, I have a problem with controlling a controller for brush motors using PWM in esp32.

A regulator like this:
https://rc-team.pl/regulatory/35491-graupner-regulator-speed-profi-40r-bec-7196.html

.

I try duty ranges from 0 to 1020.

Zero response...

How is it connected? I found nothing on the web about the control of this regulator - does it definitely have PWM control? .
Have you checked the waveform at the output of the ESP with an oscilloscope?

The signal to the PWM is connected normally, plus and minus, the connection is OK. On a raspberry pi on pwm this controller works without any problem.

Then fill in the gaps:
1. wiring diagram
2. photos of real implementation
3. full code.
Well, because if you only load what you have given then it has the right not to work.
If you are expecting someone's help then you need to make a bit of an effort and provide everything necessary.

This pin2 is GPIO2 or pin2? You say everything is ok, but it doesn't work. Without a wiring diagram it's hard to say anything.
The same without full code and check with an oscilloscope what we actually have on the port.

.
.

For example, on this board GPIO2 is connected to the LED on the PCB.

Thanks for your reply. I am attaching a diagram of what it looks like. PIN 2 actual pin. When I connect a servo with the same code on it - it works without a problem.

The code is of course micropython give full:

[syntax].
import machine
import time

esc = machine.Pin(2)
pwm = machine.PWM(esc)
pwm.freq(50)


while True:
for i in range(1020):
pwm.duty(i)
print(i)
time.sleep_us(5500)
[/syntax].

Zero response...

micropython - I don't know, so I can't comment.
Doesn't GND have to be connected?
What is PIN2?

According to the diagram of GPIO 2. Plus and minus is from the battery, the regulator is powered correctly.

Simple test, hook up an LED instead of the regulator with a suitable resistor, change the fill and see if it works.
As far as I'm concerned the ground of the ESP and the power supply of the regulator should be connected.

I connect the servo - and it works.

And do you also power the servo as in "your diagram" or directly from the ESP?

No, I power the servo from the ESP, just now I checked that when I connect it as from the zchemat it does not work. But I don't understand one thing - on the raspberry I had identically connected in the sense from an external power source and it worked ?. Okay, but the regulator is powered by 12v, and in the wire that comes out of the regulator together with the signal (3 wires) goes 3.5v so I can't connect that to the esp either....

Connect the ground of the battery from which you are feeding the motor to the ground of the ESP and it should work.
The regulator and ESP generating the PWM signal should share a common ground.
Just don't mix up the poles or there will be smoke....

prem111 wrote:

and in the wire that comes out of the regulator together with the signal (3 wires) goes 3.5v so I can't connect that to the esp either...

.
Up to 3.6v is still safe for the ESP32.

Maybe you could give us a scan of the documentation for this regulator? because without that it's hard to say anything more. I had the ground connected and not input "some" voltage/supply from the regulator because I don't know what it is.
Without documentation it's always a risk that you'll burn something.

I've searched the internet, but so quick no documentation of this wonder.
And a description/description of this 3pin plug is needed.

@prem111 What PWM frequency did you set? According to the documentation it is supposed to be 1 kHz.

lukaszd82 wrote:

Connect the ground of the battery from which you are powering the motor to the ground of the ESP and it should work.
The regulator and ESP generating the PWM signal should share a common ground.
Just don't mix up the poles or there will be smoke...

.

Thanks - it works !