1  #include <Wire.h>
 2  
 3  void setup() {
 4    Serial.begin(115200);
 5    while (!Serial);
 6    Wire.begin();
 7    
 8    Serial.println("Scanning I2C devices...");
 9    for (byte address = 1; address < 127; address++) {
10      Wire.beginTransmission(address);
11      if (Wire.endTransmission() == 0) {
12        Serial.print("Found I2C device at 0x");
13        Serial.println(address, HEX);
14        delay(5);
15      }
16    }
17  }
18  
19  void loop() {}