• MCU/module: ESP32 DevKitC / ESP32-WROVER-E compatible
• Framework: Arduino on PlatformIO
• Monitor speed: 115200

Ini
[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200
lib_deps =
    adafruit/Adafruit SSD1306@^2.5.10
    adafruit/Adafruit GFX Library@^1.11.9
    adafruit/DHT sensor library@^1.4.6

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

#define PIN_POT_ADC       34
#define PIN_LDR_ADC       35
#define PIN_OIL_ADC       33
#define PIN_RAIN_ADC      32
#define DHTPIN_GPIO       27
#define PIN_LED_FRENO_1   14
#define PIN_LED_FRENO_2   12
#define PIN_LED_FARO      13
#define PIN_MOTOR_PWM     25
#define PIN_MOTOR_DIR     26
#define I2C_SDA_GPIO      21
#define I2C_SCL_GPIO      22

#define DHTTYPE DHT11
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET -1

DHT dht(DHTPIN_GPIO, DHTTYPE);
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

const int PWM_CH_MOTOR = 0;
const int PWM_FREQ = 20000;
const int PWM_RES_BITS = 8;

unsigned long lastUpdate = 0;

int readAdc12(int pin) {
  return analogRead(pin);
}

void setupOutputs() {
  pinMode(PIN_LED_FRENO_1, OUTPUT);
  pinMode(PIN_LED_FRENO_2, OUTPUT);
  pinMode(PIN_LED_FARO, OUTPUT);
  pinMode(PIN_MOTOR_DIR, OUTPUT);
  digitalWrite(PIN_MOTOR_DIR, LOW);
  ledcSetup(PWM_CH_MOTOR, PWM_FREQ, PWM_RES_BITS);
  ledcAttachPin(PIN_MOTOR_PWM, PWM_CH_MOTOR);
  ledcWrite(PWM_CH_MOTOR, 0);
}

void setupDisplay() {
  Wire.begin(I2C_SDA_GPIO, I2C_SCL_GPIO);
  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("OLED not found at 0x3C; continuing without display");
    return;
  }
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.println("DASHBOARD IRS");
  display.display();
}

void setup() {
  Serial.begin(115200);
  delay(200);
  analogReadResolution(12);
  analogSetAttenuation(ADC_11db);
  setupOutputs();
  dht.begin();
  setupDisplay();
  Serial.println("ESP32 Automotive Dashboard firmware started");
}

void loop() {
  unsigned long now = millis();
  if (now - lastUpdate < 500) return;
  lastUpdate = now;

  int pot = readAdc12(PIN_POT_ADC);
  int ldr = readAdc12(PIN_LDR_ADC);
  int oil = readAdc12(PIN_OIL_ADC);
  int rain = readAdc12(PIN_RAIN_ADC);
  float tempC = dht.readTemperature();

  float speedPct = (pot / 4095.0f) * 100.0f;
  bool brake = speedPct > 70.0f;
  bool dark = ldr < 1800;

  digitalWrite(PIN_LED_FRENO_1, brake ? HIGH : LOW);
  digitalWrite(PIN_LED_FRENO_2, brake ? HIGH : LOW);
  digitalWrite(PIN_LED_FARO, dark ? HIGH : LOW);

  uint8_t motorDuty = map(pot, 0, 4095, 0, 255);
  ledcWrite(PWM_CH_MOTOR, motorDuty);

  Serial.printf("pot=%d speed=%.1f%% ldr=%d oil=%d rain=%d temp=%.1fC brake=%d faro=%d duty=%u\n",
                pot, speedPct, ldr, oil, rain, tempC, brake, dark, motorDuty);

  if (display.width() > 0) {
    display.clearDisplay();
    display.setCursor(0, 0);
    display.println("DASHBOARD IRS");
    display.printf("Vel: %.0f%%\n", speedPct);
    display.printf("Luz: %d\n", ldr);
    display.printf("Oil: %d Rain: %d\n", oil, rain);
    if (!isnan(tempC)) display.printf("Temp: %.1f C\n", tempC);
    display.printf("Brake:%s Faro:%s\n", brake ? "ON" : "OFF", dark ? "ON" : "OFF");
    display.display();
  }
}

Bash
pio run
pio run -t upload
pio device monitor