HX711–Customize Your Own Digital Scale

				
					#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>//OLED library

#define ADSK 2
#define ADDO 3
  
Adafruit_SSD1306 display(128,64, &Wire, -1);
//Set the screen size of OLED

long NormalValue;
long measuer(void);
long Weight;
void setup() {
  //Serial.begin(9600);//serial initialization
  pinMode(ADSK,OUTPUT);
  pinMode(ADDO,INPUT);
  digitalWrite(ADSK,0);
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);//Initialize OLED and set IIC communication address
  NormalValue=measuer();//store initial error value
}
void loop() {
  Weight=measuer()-NormalValue;
  //Serial.println(Weight/400);//send to serial,/400 is the parameter for convert pressure to weight,which need to adjusted gradually
  display.clearDisplay();//Clear screen
  display.setTextColor(WHITE);//Setting text color, monochrome OLED is invalid, but must have
  display.setTextSize(2);//Set text size
  display.setCursor(0, 0);//Set the starting X and Y axes of the text
  display.print("Weith:");
  display.setCursor(0, 20);
  if(Weight<0)// if the weight less than 0,will be a BUG if directly displaying on OLED
  {
    display.print("-");
    display.print((Weight/(-400000))%10);//thousands
    display.print((Weight/(-40000))%10);//hundreds
    display.print((Weight/(-4000))%10);//tens
    display.print((Weight/(-400))%10);//units
    display.print(".");
    display.print((Weight/(-40))%10);//decimal
  }
  else//weight greater than 2
  {
    display.print((Weight/400000)%10);
    display.print((Weight/40000)%10);
    display.print((Weight/4000)%10);
    display.print((Weight/400)%10);
    display.print(".");
    display.print((Weight/40)%10);
  }
  display.print("g");
  display.display();//Execute Display
}

long measuer()//read function,channel A,gain 128
{
    long Count; 
    char i; 
    digitalWrite(ADSK,0);
    Count=0; 
    while(digitalRead(ADDO)); 
    for (i=0;i<24;i++)
    { 
    digitalWrite(ADSK,1);
    delayMicroseconds(1);
    Count=Count<<1; 
    digitalWrite(ADSK,0);
    delayMicroseconds(1);
    if(digitalRead(ADDO)) 
      Count++; 
    } 
    digitalWrite(ADSK,1);
    Count=Count^0x800000;  
    digitalWrite(ADSK,0);
    return Count; 
  }