Arduino I2c Scanner

Arduino I2C Scanner

This article Is trick about serial connection on I2C-Bus in Arduino Board. Because of the time on develop software associated I2C device, the device may not respond. So it can not be said that the problem is that the i2c device or develop a program.

Advantages of I2C Scanner

• Find the Address of I2C Device.
• Check responds of I2C device.

* If found I2C Device Address, It can used to program the Arduino board.

* If not found I2C Device Address, Check the jumper cable (if jumper cable are Correct Device may be cracked.)

Example Program

	/*
	Referent By arduino.cc
	https://playground.arduino.cc/Main/I2cScanner
	*/
	#include <Wire.h>
	void setup()
	{
	Wire.begin();
	Serial.begin(9600);
	while (!Serial); // Leonardo: wait for serial monitor
	Serial.println("\nI2C Scanner");
	}
	void loop()
	{
	byte error, address;
	int nDevices;
	Serial.println("Scanning...");
	nDevices = 0;
	for(address = 1; address < 127; address++ )
	{
	// The i2c_scanner uses the return value of
	// the Write.endTransmisstion to see if
	// a device did acknowledge to the 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(5000); // wait 5 seconds for next scan
	}

view raw arduino_i2c_scanner.ino hosted with ❤ by GitHub

Examples Circuit use Real Time Clock (DS1307) and 16x2 LCD I2C

i2c scanner Program

Referent 

   - https://playground.arduino.cc/Main/I2cScanner