diff --git a/i2c_scanner/i2c_scanner.ino b/i2c_scanner/i2c_scanner.ino
new file mode 100644
index 0000000000000000000000000000000000000000..e37fd7ec55c6d8078402fe200ad5e5849ef23d79
--- /dev/null
+++ b/i2c_scanner/i2c_scanner.ino
@@ -0,0 +1,54 @@
+#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("Unknow 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
+    }