#include <Wire.h>
void setup() {
Wire.begin();
Serial.begin(115200);
while (!Serial) {delay(100);};
Serial.println();
Serial.println(«I2C 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.println(address,HEX);
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);
}