#include <Wire.h> #include <LiquidCrystal_I2C.h> #include "HX711.h"

#define BLYNK_TEMPLATE_ID "TMPL2wEywxXvc" #define BLYNK_TEMPLATE_NAME "IoT Gas Level Indicator" #define BLYNK_AUTH_TOKEN "jkcBLPSAMR4_zCxxnKEBD14DJECbR2_Y"

#include <WiFi.h> #include <WiFiClient.h> #include <BlynkSimpleEsp32.h>

// Pin definitions #define HX711_DT 33 // HX711 data pin #define HX711_SCK 32 // HX711 clock pin #define I2C_SDA 21 // ESP32 I2C SDA pin #define I2C_SCL 22 // ESP32 I2C SCL pin

// Initialize LCD and HX711 LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust address if needed HX711 scale;

#define BLYNK_PRINT Serial char auth[] = BLYNK_AUTH_TOKEN;

// Your WiFi credentials. // Set password to "" for open networks. char ssid[] = "Love"; char pass[] = "12345678";

void setup() { // Initialize serial communication Serial.begin(115200);

// Initialize LCD lcd.begin(); lcd.clear(); lcd.backlight();

lcd.setCursor(0, 0); lcd.print("Initializing..."); delay(1000); lcd.clear();

// Initialize HX711 scale.begin(HX711_DT, HX711_SCK);

// Wait for scale to stabilize delay(1000);

if (scale.is_ready()) { lcd.clear(); lcd.setCursor(0, 0); lcd.print("GROUP A ELE 391"); lcd.setCursor(0, 1); lcd.print("2024/2025"); delay(2000); lcd.clear(); lcd.print("Scale Ready"); delay(2000); lcd.clear(); scale.set_scale(-110); // Calibration factor placeholder scale.tare(); // Reset scale to 0 } /else { lcd.clear(); lcd.print("Scale Error"); Serial.println("HX711 not found. Check wiring."); while (1); // Halt }/ Blynk.begin(auth, ssid, pass);

}

void loop() {

Blynk.run();

if (scale.is_ready()) { float weight = scale.get_units(1); // Average of 5 readings lcd.setCursor(0, 0); lcd.print("Weight:");

lcd.setCursor(0, 1);
lcd.print(weight, 2); // Print weight with 2 decimal places

float reading;
//lcd.print(reading);
lcd.print(" g");                 // Print the unit

Serial.print("Weight: ");
//Serial.print(reading);
//Serial.println(" grams");

Blynk.virtualWrite(V0,weight); Blynk.virtualWrite(V1,weight);

} /*else { lcd.setCursor(0, 0); lcd.print("Scale Error"); Serial.println("HX711 not found. Check wiring."); } */

delay(5000); }