code_for_stuff

#define BLYNK_TEMPLATE_ID "TMPL28x7pTwnS"
#define BLYNK_TEMPLATE_NAME "Soly Monitoring System"
#define BLYNK_AUTH_TOKEN "PGPjAaq3osOR2W8odrdgmTPAHy-W6kCy"
#define BLYNK_PRINT Serial

#include <Wire.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_ADS1X15.h>
#include <BlynkSimpleEsp32.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Pin definitions
const int oneWirePin = D3; // OneWire pin for DS18B20

// OLED display
Adafruit_SSD1306 display(128, 64, &Wire);

// ADS1115
Adafruit_ADS1115 ads;

// DS18B20 temperature sensor
OneWire oneWire(oneWirePin);
DallasTemperature sensors(&oneWire);

float voltage =0;
float current =0;
float power =0;
unsigned long previousMillis = 0;
float energy = 0;
float temperature =0;
float saving =0; // cost saving
const float EnergyCost = 6.5;

// Voltage divider resistor values
const float R1 = 100;  // 100K
const float R2 = 10;  // 10K
const float R3 = 1;  // 1K
const float R4 = 2; // 2K

// ACS758 zero-current output voltage ( Offset Voltage)
float OffsetVoltage = 2.5; 
// ACS758 current sensor sensitivity
const float sensitivity = 40; // in mV/A

//========================= Variables for wifi server setup =============================
const char* ssid = "TP-Link_3F0A";
const char* password = "81488834";
const char* blynkAuth = BLYNK_AUTH_TOKEN;     


void setup()
{
  Serial.begin(115200);  
  // Initialize the Wi-Fi and Blynk connections
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nConnected to Wi-Fi");
  Blynk.begin(blynkAuth, ssid, password);
   
  // Initialize the OLED display
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  display.display();

  // Initialize the ADS1115
  ads.begin();

  // Initialize the DS18B20 temperature sensor
  sensors.begin();
}

void loop() {
  
  // Read the raw voltage values from the ADS1115
  int16_t voltageRaw = ads.readADC_SingleEnded(0);
  int16_t currentRaw = ads.readADC_SingleEnded(1);

  // Calculate the voltage values in Volts
  float voltageVolts = voltageRaw * (0.1875/1000) ; //  0.1875mV is default Gain 
  float voltage = voltageVolts * ((R1 + R2) / R2); // Calculate the actual voltage by using the voltage dividers  
  
  // Calculate the current values in Amps
  float currentVolts = currentRaw * ((R3 + R4) / R4)* (0.1875/1000); //  0.1875mV is default Gain 
  current =  (currentVolts - OffsetVoltage )/(sensitivity / 1000.0) ; // convert voltage into current  
   
  // Calculate the power output (P = V * I)
  power = voltage * current;

  // Calculate energy by integrating power over time
  unsigned long currentMillis = millis();
  energy += power * (currentMillis - previousMillis) / 3600000; // Energy in Wh
  saving = EnergyCost * ( energy /1000 );
  previousMillis = currentMillis;

  // Read the temperature from the DS18B20 sensor
  sensors.requestTemperatures();
  temperature = sensors.getTempCByIndex(0);  // temperature in Celsius
//temperature = sensors.getTempFByIndex(0); // temperature in Fahrenheit
 
  //Display the values on the OLED screen  
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(10, 10); 
  display.print(voltage,2);
  display.println(" V");
  display.setCursor(70, 10); 
  display.print(current,2);
  display.println(" A");
  display.setTextSize(2);
  display.setCursor(10,25);  
  display.print(power,2);
  display.println(" W");
  display.setCursor(10,45); 
  display.print(energy,2);
  display.println(" Wh");
 // display.print("T: ");
 // display.print(temperature);
 // display.println(" C");
  display.display();

  // ================= Display Data on Blynk App ================================================
    
  // Send the data to Blynk
  Blynk.run();
  Blynk.virtualWrite(V0, voltage);
  Blynk.virtualWrite(V1, current);
  Blynk.virtualWrite(V2, power);
  Blynk.virtualWrite(V3, energy/1000);
  Blynk.virtualWrite(V4, temperature);
  Blynk.virtualWrite(V5, saving);

 // Print the values on the Serial Monitor  
  Serial.print(" Voltage: ");
  Serial.print(voltage);
  Serial.print("V");  
  Serial.print(" Current: ");
  Serial.print(current);
  Serial.print("A");
  Serial.print(" Power: ");
  Serial.print(power);
  Serial.print("W");
  Serial.print(" Energy: ");
  Serial.print(energy,2);
  Serial.print("Wh");
  Serial.print(" Savings: ");
  Serial.print("Rs.");
  Serial.print(saving,2);  
  Serial.print(" Temp: ");
  Serial.print(temperature);
  Serial.println("C");
  
  delay(100);
}