21, Feb, 2019

ARDUINO I2C device address scanner codes

i2c device address scanner

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

1 Comment

    Connect Arduino with LCD 16X2 display program – Computer Aided Automation

    February 9, 2019 at 4:13 pm
    Reply

    […] Refer ARDUINO I2C SCANNER CODE […]

Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes:

<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <s> <strike> <strong>