#include <ESP32Servo.h>

#include <WiFi.h>

#include <ThingSpeak.h>

#include <NTPClient.h>
#include <time.h>

Servo solar panel;

#define LDR PIN 36

const float GAMMA 0.7;

const float RL10 = 50;

float angle;

const int servoPin = 13;

char ssid[] = "Wokwi-GUEST";

char pass[] = "";

WiFiClient client;

unsigned long myChannelNumber 2128230,

const char myWriteAPIKey = "33PDM29T8Sceocne"; int statusCode;

WiFiUDP ntpuDP;

NTPClient timeClient(ntpUDP, "pool.ntp.org", 19800, 60000);

void setup() {

solarPanel.attach(servoPin);

Serial.begin(115200);

pinMode(LDR_PIN, INPUT);

void setup() {

solarPanel.attach(servoPin);

Serial.begin(115200);

pinMode(LDR PIN, INPUT); WiFi.mode(WIFI_STA);

ThingSpeak.begin(client); wificonnection();

timeClient.begin();

}

void wificonnection(){

Serial.println("Attempting to connect"); while (WiFi.status() != WL_CONNECTED) (

WiFi.begin(ssid, pass); D

Serial.print("."); delay(5000);

}

void channelupdation() {

if(statusCode== 200) {//successful writing code Serial.println("Channel update successful.");

} else {
  

  }

  void channelupdation()

  {

  if(statusCode == 200) {//successful writing code Serial.println("Channel update successful."); }

  else {

  Serial.println("Problem Writing data. HTTP error code:"+

  String(statusCode));

  }

  }

  void loop() {

  int analogValue = analogRead(36);

  float voltage analogValue / 4699.5

  float resistance 2000 voltage (1 voltage / 5);

  float lux pow(RL10 163 pow(10, GAMMA) / resistance, (1/GAMMA));

  timeClient.update();

  time t now timeClient.getEpochTime(),

  setenv("TZ", "Asia/Kolkata", 1);

  tzset();


  timeClient.update();

  time t now timeClient.getEpochTime(); setenv("TZ", "Asia/Kolkata", 1); tzset();

  struct tm int hour timeinfo localtime(&now); timeinfo->tm hour, int minute timeinfo->tm_min; if(hour>=7 && hour<11)

  { } angle=45;

  else if(hour>=11 && hour<14)

  { angle=90;

  else if(hour>=14 && hour<17)

  angle=135;

  else if(hour>=17 && hour<=18)

  { angle=179;



  }

  else{

  angle=0;

  }

  solarPanel.write(angle);

  Serial.println("Time: "+String(hour)+":"+String(minute));

  Serial.println("Angle: "+String(angle));

  Serial.println("Lux: ");

  Serial.print(lux);

  Serial.println("Voltage: "+String(voltage));

  Serial.println("<--

  ThingSpeak.setField(1, voltage);

  ThingSpeak.setField(2, angle);

  ThingSpeak.setField(3, lux);

  ThingSpeak.setField(4,hour); ThingSpeak.setField(5,minute);

  statusCode ThingSpeak-writeFields(myChannelNumber, mykriteAPIKey),

  channelupdation();

  delay(15000);

  }