//----------------------------------------Include the NodeMCU ESP8266 Library

//----------------------------------------see here: https://www.youtube.com/watch?v=8jMr94B8iN0 to add NodeMCU ESP8266 library and board

#include <WiFi.h>

//----------------------------------------Include the ThingSpeak Library, Download here : https://github.com/mathworks/thingspeak-arduino

#include "ThingSpeak.h"
#include <ESP32Servo.h>
  

#define ON_Board_LED 5 //--> Defining an On Board LED, used for indicators when the process of connecting to a wifi router

#define LIGHT 1 //--> Defining LIGHT/Relay Port


const int servoPin = 0;

Servo servo;


//----------------------------------------SSID and Password of your WiFi router/hotspot

const char *ssid = "Wokwi-GUEST";

const char *password = "";

  

//----------------------------------------Channel ID on ThingSpeak

unsigned long channel = 2377889;

  

//----------------------------------------Declaration field1, I use field1 for light / relay, if you use many fields, add field1, field2, and so on.

unsigned int field1 = 3;

  

WiFiClient client;

  

//----------------------------------------SETUP

void setup() {

 Serial.begin(115200);

 delay(100);

 pinMode(LIGHT, OUTPUT); //--> LIGHT/Relay port Direction output

 digitalWrite(LIGHT, LOW); //--> Turn off LIGHT. LIGHT/Relay use active high, some relay modules may be different.



 //----------------------------------------Wait for connection

 WiFi.begin(ssid, password);

 Serial.println("");

 Serial.print("Connecting");

 while (WiFi.status() != WL_CONNECTED) {

  Serial.print(".");


 }

 Serial.println("");

 Serial.print("Successfully connected to : ");

 Serial.println(ssid);

 Serial.print("IP address: ");

 Serial.println(WiFi.localIP());

 Serial.print("Netmask: ");

 Serial.println(WiFi.subnetMask());

 Serial.print("Gateway: ");

 Serial.println(WiFi.gatewayIP());

 //----------------------------------------ThingSpeak.begin(client)
servo.attach(servoPin, 500, 2400);
 ThingSpeak.begin(client);
 
}

int pos = 0;
  

void loop() {

 int statusCode = 0;

 int last_light_state = ThingSpeak.readFloatField(channel, field1); //--> get the latest data from the fields on ThingSpeak

 statusCode = ThingSpeak.getLastReadStatus(); //--> Check the status of the read operation to see if it was successful



 if(statusCode == 200){

  if(last_light_state == 1){

   digitalWrite(LIGHT, HIGH);

   Serial.println("LIGHT is On");

  for (; pos <= 180; pos += 1) {
    servo.write(pos);
    delay(15);
    }
  }

  else if(last_light_state == 0){

   digitalWrite(LIGHT, LOW);

   Serial.println("LIGHT is Off");

  for (; pos >= 0; pos -= 1) {
    servo.write(pos);
    delay(15);
   }
   

  }

  Serial.print("The latest data from Field1 on ThingSpeak is : ");

  Serial.println(last_light_state);  

 }

 else {

  Serial.println("Problem reading channel. HTTP error code " + String(statusCode));

 }

 delay(150);

}