#include <WiFi.h>
#include <ThingSpeak.h>
#include <HX711.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
const int LOADCELL_DOUT_PIN = 15;
const int LOADCELL_SCK_PIN = 2 ;
const float calibration_factor = 100.0;
HX711 scale; 
long units;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2279390;
const char * myWriteAPIKey = "DMV9RHKW37I550XH";
int statusCode;

void setup() {
  Serial.begin(115200);
 
  WiFi.mode(WIFI_STA);
ThingSpeak.begin(client);
scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  scale.set_scale(calibration_factor);
  scale.tare();
   Serial.println("Hello, ESP32!");

  lcd.init();
  lcd.backlight();

  
 
}
  //String normal="normal";
// int overload="overload";

void loop() {
  units = scale.get_units(); 


  if(WiFi.status() != WL_CONNECTED)
  {
  Serial.print("Attempting to connect");
    while(WiFi.status() != WL_CONNECTED)
    {
    WiFi.begin(ssid, pass); 
    Serial.print(".");
    delay(1000);
    }
  Serial.println("\nConnected.");
  }
  // Get a weight reading from the load cell
  float weight = scale.get_units();
  // LCD PRINT THE WEIGHT ON THE SERIAL MONITORING
  
  // Print the weight on the serial  monitor
  Serial.print("Weight: ");
  lcd.setCursor(2,0);
  lcd.print("weight :");
  lcd.print(weight);
  lcd.print(" kg");
  Serial.print(weight);
  Serial.println(" kg");

  delay(1000);
// Serial.println(units);
 
  
   ThingSpeak.setField(1,weight);

statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
if(statusCode ) { //successful writing code
Serial.println("Channel update successful.");
}
else {
Serial.println("Problem Writing data. HTTP error code :" +String(statusCode));
}


  delay(1000);
}