#include <OneWire.h>
OneWire ds(4);         //D2 GPIO4 DS18B20 IN OUT
void setup() {
 Serial.begin(115200);
 delay(1000);

}

void loop() {
  // put your main code here, to run repeatedly:
 getROMCode();
  delay(10000);
}

void getROMCode(void) {
  byte i,i1;
  byte addr[8]; //ROMCode格納変数

  Serial.println("");
  Serial.println("");
  Serial.print(" ====================== DS18B20 Getting the ROMCode ======================\n\r");
  Serial.println("             8bitFamilyCode |          48bit SerialNumber       | 8bit CRC");
  while(ds.search(addr)) {

    Serial.print("No");
    Serial.print(++i1);
    Serial.print(" Search ROMCode is:\t");
    for( i = 0; i < 8; i++) {
      Serial.print("0x");
      if (addr[i] < 16) {
        Serial.print('0');
      }
      Serial.print(addr[i], HEX);
      if (i < 7) {
        Serial.print(", ");
      }
    }
    if ( OneWire::crc8( addr, 7) != addr[7]) {
        Serial.print("CRC is not valid!\n");
        return;
    }
    Serial.println("");
  }
  ds.reset_search();
  return;
}