#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

const int POT_PIN = 1;
const int SERVO_PIN = 8;

const int PWM_CHANNEL = 0;
const int PWM_FREQ = 50;
const int PWM_RESOLUTION = 16;

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

int angleToDuty(int angle) {
  int minDuty = 1638;
  int maxDuty = 8192;
  return map(angle, 0, 180, minDuty, maxDuty);
}

void setup() {
  Serial.begin(115200);

  // OLED
  Wire.begin(9, 10); // SDA, SCL (padrão no Wokwi ESP32-S3)
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);

  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);

  // PWM servo
  ledcAttachChannel(SERVO_PIN, PWM_FREQ, PWM_RESOLUTION, PWM_CHANNEL);
}

void loop() {
  int valorPot = analogRead(POT_PIN);
  int angulo = map(valorPot, 0, 4095, 0, 180);

  int duty = angleToDuty(angulo);
  ledcWriteChannel(PWM_CHANNEL, duty);

  // OLED
  display.clearDisplay();

  display.setCursor(0, 0);
  display.print("Pot: ");
  display.println(valorPot);

  display.print("Angulo: ");
  display.println(angulo);

  display.print("PWM: ");
  display.println(duty);

  display.display();

  delay(100);
}