Arduino 扫描IIC/I2C设备地址代码 附LiquidCrystal_I2C库文件下载

#include "Wire.h"
void setup() {
    Serial.begin (115200); // Leonardo: wait for serial port to connect
    while (!Serial) { }
    Serial.println ();
    Serial.println ("I2C scanner. Scanning ...");
    byte count = 0;
    Wire.begin();
    for (byte i = 8; i < 120; i++) {
        Wire.beginTransmission (i);
        if (Wire.endTransmission () == 0) {
          Serial.print ("Found address: ");
          Serial.print (i, DEC);
          Serial.print (" (0x");
          Serial.print (i, HEX);
          Serial.println (")");
          count++;
          delay (1); // maybe unneeded?
        } // end of good response
    } // end of for loop
    Serial.println ("Done.");
    Serial.print ("Found ");
    Serial.print (count, DEC);
    Serial.println (" device(s).");
} // end of setup
void loop() {}