.c

#include <Wire.h>

void setup() {
  // put your setup code here, to run once:
  Wire.begin();                // join i2c bus (address optional for master)
  Serial.begin(9600); 
}

int reading = 0;


void loop() {
  
  Wire.beginTransmission(0); 
  Wire.write(0xaa);      
  Wire.write(0x00);      
  Wire.write(0x00);      
  
  
  Wire.endTransmission();      

  
  delay(20);                   

  
  Wire.beginTransmission(0); 
  Wire.write(0x00);      
  Wire.endTransmission();      

  
  Wire.requestFrom(0, 7);    

  
  if (7 <= Wire.available()) { 
    reading = Wire.read();  
    reading = reading << 8;    
    reading |= Wire.read(); 
    Serial.println(reading);   
  }

  delay(1000);                  
}