#include <Arduino.h>
#include <Wire.h>
void setup() {
Wire.begin();
Serial.begin(9600);
while (!Serial);
Serial.println("\nI2C Test");
}
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("Device Address: 0x");
if (address < 16) {
Serial.print("0");
}
Serial.print(address, HEX);
Serial.println("");
nDevices++;
}
else if (error == 4) {
Serial.print("Error Address: 0x");
if (address < 16) {
Serial.print("0");
}
Serial.println(address, HEX);
}
}
if (nDevices == 0) {
Serial.println("No Device.\n");
} else {
Serial.println("Scan Over.\n");
}
delay(3000);
}