ESP32-C3 Simulator: Architecture Breakdown & Circuit Guide

#include <WiFi.h>

const int statusLed = 7;

void setup() {
  pinMode(statusLed, OUTPUT);
  Serial.begin(115200);
  Serial.println("ESP32-C3 Wi-Fi Scanner Starting...");

  // Set Wi-Fi to station mode and disconnect from previous connections
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);
}

void loop() {
  Serial.println("Scanning for 2.4 GHz networks...");
  digitalWrite(statusLed, HIGH);

  int n = WiFi.scanNetworks();
  digitalWrite(statusLed, LOW);

  if (n == 0) {
    Serial.println("No networks found.");
  } else {
    Serial.print(n);
    Serial.println(" networks discovered:");
    for (int i = 0; i < n; ++i) {
      Serial.print("  ");
      Serial.print(i + 1);
      Serial.print(": ");
      Serial.print(WiFi.SSID(i));
      Serial.print(" (Signal: ");
      Serial.print(WiFi.RSSI(i));
      Serial.println(" dBm)");
      delay(10);
    }
  }
  Serial.println("--------------------------------");
  delay(5000);
}

const int potPin = 0; // ADC1 Channel 0

void setup() {
  Serial.begin(115200);
  Serial.println("ESP32-C3 12-Bit Analog Telemetry Ready");
}

void loop() {
  // Read 12-bit ADC raw value (0 to 4095)
  int rawValue = analogRead(potPin);

  // Convert to physical 3.3V voltage level
  float voltage = (rawValue * 3.3) / 4095.0;

  Serial.print("12-Bit ADC Value: ");
  Serial.print(rawValue);
  Serial.print(" / 4095 | Calculated Voltage: ");
  Serial.print(voltage, 3);
  Serial.println(" V");

  delay(250);
}

const int buttonPin = 3;
const int buzzerPin = 4;

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(buzzerPin, OUTPUT);
  Serial.begin(115200);
  Serial.println("ESP32-C3 Sound Generator Online. Press button to play sound.");
}

void loop() {
  int isPressed = (digitalRead(buttonPin) == LOW);

  if (isPressed) {
    Serial.println("Button Pressed -> Playing Chime Tone");
    tone(buzzerPin, 1000, 150); // 1 kHz tone for 150ms
    delay(180);
    tone(buzzerPin, 1600, 200); // 1.6 kHz tone for 200ms
    delay(300);
  }
}

const int trigPin = 5;
const int echoPin = 6;
const int greenLed = 7;
const int redLed = 10;

void setup() {
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(greenLed, OUTPUT);
  pinMode(redLed, OUTPUT);
  Serial.begin(115200);
  Serial.println("ESP32-C3 Distance Sentinel Online");
}

void loop() {
  // Send 10-microsecond ultrasonic trigger pulse
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  // Measure echo return time in microseconds
  long duration = pulseIn(echoPin, HIGH);
  int distance = duration * 0.034 / 2; // Convert speed of sound (0.034 cm/us) to distance

  Serial.print("Measured Distance: ");
  Serial.print(distance);
  Serial.println(" cm");

  if (distance > 0 && distance < 15) {
    // Proximity alert: Red LED ON, Green LED OFF
    digitalWrite(redLed, HIGH);
    digitalWrite(greenLed, LOW);
  } else {
    // Normal clear zone: Red LED OFF, Green LED ON
    digitalWrite(redLed, LOW);
    digitalWrite(greenLed, HIGH);
  }

  delay(100);
}