ESP32 from book Learn ESP32 with Arduino IDE (error)

Projects Programming
1

I'm getting an error when I verify my code. I have copied from the book. I get "lcdcSetup was not declared in this scope. Below is the code. I'm lost could someone point out what is wrong?

// the number of the LED pin
const int ledPin = 16; // 16 corresponds to GPOI16

// setting PMW properties
const int freq = 5000;
const int ledChannel = 0;
const int resolution = 8;

void setup() {
  // configure LED PMW functionitites
  ledcSetup(ledChannel, freq, resolution);

  // attach channel to the GPIO to be connected
  ledcAttachPin(ledPin, ledChanne);
}

void loop() {
  // increase the LED brightness
  for(int dutyCycle = 0; dutyCycle <= 255; dutyCycle++){
    // changing the LED brightness with PMW
    ledWrite(ledChannel, dutyCycle);
    delay(15);
  }

  // decress the LED brightness
  for(int dutyCycle = 0; dutyCycle >= 255; dutyCycle--){
    // changing the LED brightness with PMW
    ledWrite(ledChannel, dutyCycle);
    delay(15);
  
  }

}
2

From the migration document
Screenshot 2024-10-04 at 17.45.27
Simple fix is drop boards back to 2.0.17

3

Thank you very much for your help.

4

Good to hear, don't forget to mark my post solved.

5

alternatively you could update your LCD code from ESP32 Arduino Core 2.x to 3.x
see Espressif ESP32 LED Control (LEDC)

6

How do I mark it solved?

7

Thank you, I plan on that after I finish the book. There are other examples using this same code. Now that I have encounter this. I'm sure I will encounter other things like this seeing how the book is a few years old. Also, is this normal in the micro controllers?

8

updating libraries etc without ensuring backwards compatibility is common in programming environments - both microcontroller, PC based, etc
I have various ESP32 projects - most use ESP32 Arduino Core 3.x but some require 2.x because sensor libraries etc have not been updated to use 3.x