#include <WiFi.h>
#include <ThingSpeak.h>
#include <HX711.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
const int DT_PIN = 15;
const int SCK_PIN = 2 ;
const float calibration_factor = 100;
HX711 scale; 
long units;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";
WiFiClient client;
unsigned long myChannelNumber = 2615937;
const char * myWriteAPIKey = "XRUX9HS106ZYPKNL";
int statusCode;
void setup()
 {
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
  scale.begin(DT_PIN,SCK_PIN);
  scale.set_scale(calibration_factor);
  scale.tare();
  lcd.init();
  lcd.backlight();
}
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.");
  }
  float weight = scale.get_units();
  Serial.print("Weight: ");
  lcd.setCursor(2,0);
  lcd.print("weight :");
  lcd.print(weight);
  lcd.print(" kg");
  Serial.print(weight);
  Serial.println(" kg");
  delay(1000);  
ThingSpeak.setField(1,weight);
statusCode = ThingSpeak.writeFields(myChannelNumber,myWriteAPIKey);
if(statusCode ) 
{
Serial.println("Channel update successful.");
}
else
{
Serial.println("Problem Writing data. HTTP error code :" +String(statusCode));
}
delay(1000);
}