 
 #include <Wire.h>
 
-byte startAddress = 1; // skip reserved address from 0 to 7
+byte startAddress = 1;
 byte endAddress   = 127;
 
 void I2CBusScan(byte startAddress, byte endAddress)

  Serial.print(endAddress);
  Serial.println(".....");

  I2CBusScan( startAddress, endAddress);

  Serial.println("\ndone");
}

void loop()
{
  toggle = !toggle;
  digitalWrite(LED_BUILTIN, toggle);
  delay(5000);

  Serial.print("Start I2C Bus Scan from ");
