โค้ดเช็ครหัสจอจากชิป

#include <Wire.h>

void setup() {

  Wire.begin();

  Serial.begin(9600);

  while (!Serial);

  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\n");

  } else {

    Serial.println("done\n");

  }

  delay(5000);

}