Mega 2560 ESP32 connection

Projects Programming
21

Can you share the link where you've ordered your servos?
How many GPIO's you've used for each servo? :thinking:

22

I bought the metal geared servos from Amazon, Amazon.com : metal geared servo

1 Like
23

Very interesting...
For the project of my group it wouldnt be necessary to include machine learning...
It would be ( because we are just "newbies" ) very hard to deal with such a problem :laughing:

24

Thank you very much! :smile:

1 Like
25

Plastic geared servos do not have an accurate movement repeatability as do metal geared servos. Also the plastic wears out after 100 or so hours of continuous operations. I got some metal geared hobby grade servos in continuous operation for over 3 years.

26

sounds plausible... :nerd_face:

27

An esp32 has two processor cores, each of which is 10 times faster than Mega's, and they are 32-bit compared to Mega's 8-bit. There is far more ram memory and flash memory. The only thing the esp has less of is pins. The number of pins can be extended using I/o extender chips/modules of various kinds.

Depending on the type of driver module you use for stepper motors, they can require up to 4 Arduino pins per motor. Better driver modules use less pins, possibly sharing the same 2 pins between several driver modules (those with iĀ²c bus).

Servo motors usually have drivers built in and require only a single Arduino pin, although it must be a PWM capable pin. Some i/o extender modules can be used to increase the number of pwm capable pins (such as pca9685).

28

That sounds quit good...
Thank you very much! :smile:
Controlling 32 Servo motors with PCA9685 and ESP32 - V4 - YouTube
How in the video above I am going to do a similiar thing with the roboter arm :sunglasses:

29

Would an MG996R be recommendable?
Like:
Amazon.com: [4-Pack] MG996R 55g Metal Gear Torque Digital Servo Motor for Futaba JR RC Helicopter Car Boat Robot : Toys & Games

30

Quite. Quit means give up.

31

I didnt meant that, I meant something like... very good it wasnt ironic :sweat_smile:

32

I watched

using this sensor

https://de.aliexpress.com/item/1005002969955647.html

I ordered one, but have not played with it yet.

33

This is how you can go using I2C Bus (Fig-1).
i2cesp32Mega
Figure-1:

Test Sketches:
Master:

#include <Wire.h>

void setup()
{
  Serial.begin(115200);
  Wire.begin(21, 22); //SDA, SCL

  //-------------------------
  Wire.beginTransmission(0b0010011);  //slave address
  byte busStatus = Wire.endTransmission();
  if (busStatus != 0)
  {
    Serial.print("Communication problem...!");
    while (1);
  }
  Serial.println("Slave found...!");
}

void loop()
{
  Wire.requestFrom(0x13, 1);
  Serial.println(Wire.read(), HEX);
  delay(1000);
}

Slave:

#include <Wire.h>

void setup()
{
  Serial.begin(115200);
  Wire.begin(0b0010011); //0x20
  Wire.onRequest(sendEvent);
}

void loop(){}

void sendEvent()
{
  Wire.write(0x31);
}
34

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