ARDUINO I2C device address scanner codes

Contributor
Submitted by techrev on Tue, 02/28/2017 - 10:48
i2c address scanning arduino

How to Find Out I2C device address - the arduino codes

  • Connect I2C SCL pin to Arduino Analog pin 5
  • Connect I2C SDA pin to Arduino Analog pin 4
  • Connect Power and Ground Pins properly

 

 

 

Upload below codes to Arduino

//**********CODE BEGINS ****

#include <Wire.h>
 void setup()
{
  Wire.begin();
   Serial.begin(9600);
  while (!Serial);           
  Serial.println("\nI2C Address Scanner");
}
 void loop()
{
  byte error, address;
  int nDevices;
   Serial.println("Scanning for I2C Address ...");
  nDevices = 0;
  for(address = 1; address < 127; address++ )
  {
    Wire.beginTransmission(address);
    error = Wire.endTransmission();
     if (error == 0)
    {
      Serial.print("I2C device found at address 0x");
      if (address<16)
        Serial.print("0");
      Serial.print(address,HEX);
      Serial.println("  !");
       nDevices++;
    }
    else if (error==4)
    {
      Serial.print("Unknown error at address 0x");
      if (address<16)
        Serial.print("0");
      Serial.println(address,HEX);
    }    
  }
  if (nDevices == 0)
    Serial.println("No I2C devices found\n");
  else
    Serial.println("done\n");
   delay(4000);          
}

Open your serial monitor for the Address