#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define SCREEN_WIDTH 128  // ORelay display width, in pixels
#define SCREEN_HEIGHT 64  // ORelay display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define ORelay_RESET -1  // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, ORelay_RESET);

//Include required libraries
#include "WiFi.h"
#include <HTTPClient.h>
#include <ZMPT101B.h>

// WiFi credentials
const char* ssid = "Wokwi-GUEST";  // change SSID
const char* password = "";    // change password
// Google script ID and required credentials
String GOOGLE_SCRIPT_ID = "???????????????????????????????????????????";  // change Gscript ID

#define SENSITIVITY 500.0f
// and the voltage source frequency is 50 Hz.
int vsensor = 34;
const int ACPin = 33;
ZMPT101B voltageSensor(vsensor, 50.0);

float correctionfactor = 20;

float Current_Value = 0;

#define ACTectionRange 20;  //set Non-invasive AC Current Sensor tection range (5A,10A,20A)
#define VREF 3.3
char units[5];
unsigned long last_time = 0;
unsigned long current_time = 0;
float Wh = 0;
void setup() {
  Serial.begin(115200);
  pinMode(ACPin, INPUT);
  voltageSensor.setSensitivity(SENSITIVITY);

  // connect to WiFi
  Serial.println();
  Serial.print("Connecting to wifi: ");
  Serial.println(ssid);
  Serial.flush();
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  delay(2000);
  display.clearDisplay();
  display.setTextSize(3);
  display.setTextColor(WHITE);
  display.setCursor(10, 10);
  display.print("HELLO");
  display.display();
}
void loop() {
  char units;

  float ACcurrent = 0;
  float current_value = readACCurrentValue();
  ACcurrent = current_value;

  delay(1000);

  //Serial.print(ACcurrent);
  //Serial.println("Current: ");

  float acvoltage = voltageSensor.getRmsVoltage();
  Serial.println(acvoltage);

  float P = acvoltage * ACcurrent;
  last_time = current_time;
  current_time = millis();
  Wh = Wh + P * ((current_time - last_time) / 3600000.0);
  //   dtostrf(Wh, 4, 2, units);

  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(WHITE);
  display.setCursor(10,  0);
  display.print("V :" + String(acvoltage, 2));
  display.setCursor(10, 16);
  display.print("I :" + String(ACcurrent, 2));
  display.setCursor(10, 32);
  display.print("P :" + String(P, 2));
  display.setCursor(10, 48);
  display.print("Wh:" + String(Wh, 2));
  display.display();

  return;

  String urlFinal = "https://script.google.com/macros/s/" + GOOGLE_SCRIPT_ID + "/exec?" + "voltage=" + String(acvoltage) + "&current=" + String(ACcurrent) + "&power=" + String(P) + "&units=" + String(Wh);
  //  Serial.print("POST data to spreadsheet:");
  //Serial.println(urlFinal);
  HTTPClient http;
  http.begin(urlFinal.c_str());
  http.setFollowRedirects(HTTPC_STRICT_FOLLOW_REDIRECTS);
  int httpCode = http.GET();
  //Serial.print("HTTP Status Code: ");
  //Serial.println(httpCode);
  //---------------------------------------------------------------------
  //getting response from google sheet
  String payload;
  if (httpCode > 0) {
    payload = http.getString();
    Serial.println("Payload: " + payload);
  }
  //---------------------------------------------------------------------
  http.end();
  delay(1000);
}
float readACCurrentValue() {
  float ACCurrentValue = 0;
  float peakVoltage = 0;
  float voltageVirtualValue = 0;  //Vrms
  for (int i = 0; i < 5; i++) {
    peakVoltage += analogRead(ACPin);  //read peak voltage
    Serial.println(ACPin);
    peakVoltage = peakVoltage + correctionfactor;
    delay(1);
  }
  peakVoltage = peakVoltage / 5;
  voltageVirtualValue = peakVoltage * 0.707;  //change the peak voltage to the Virtual Value of voltage

  /*The circuit is amplified by 2 times, so it is divided by 2.*/
  voltageVirtualValue = (voltageVirtualValue / 4095 * VREF) / 2;

  ACCurrentValue = voltageVirtualValue * ACTectionRange;

  return ACCurrentValue;
}