#include <WiFi.h>
#include "ThingSpeak.h"

const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2502957;
const char* myApiKey = "A2NW2U8QEX43NJBY";
const char* server = "api.thingspeak.com";

WiFiClient client;

const int trigPin = 22;
const int echoPin = 21;
const int potentiometerPin = 34;

void setup() {
  Serial.begin(115200);
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
  pinMode(potentiometerPin, INPUT);

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Wifi not connected");
  }
  Serial.println("Wifi connected !");
  Serial.println("Local IP: " + String(WiFi.localIP()));

  ThingSpeak.begin(client);
}

void loop() {
  int potValue = analogRead(potentiometerPin);
  float voltage = potValue * (5.0 / 1023.0); // Convert ADC reading to voltage (assuming 5V supply)

  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) / 29.1; // Convert duration to distance in cm

  ThingSpeak.setField(1, voltage);
  ThingSpeak.setField(2, distance);
  ThingSpeak.writeFields(myChannelNumber, myApiKey);

  Serial.print("Potentiometer Voltage: \t");
  Serial.println(voltage);
  Serial.print("Ultrasonic Distance: \t");
  Serial.println(distance);

  delay(3000);
}