#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++ )
{
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');
else
Serial.println('done');
delay(5000); // wait 5 seconds for next scan
}