#include <OneWire.h>

OneWire ds(4);    //D2 GPIO4 DS18B20 IN OUT
byte temp0[8] = { 0x28, 0x48, 0x90, 0x7A, 0x12, 0x21, 0x01, 0x90 };
byte temp1[8] = { 0x28, 0x58, 0xA7, 0x57, 0x12, 0x21, 0x01, 0xF3 };
byte temp2[8] = { 0x28, 0xFF, 0x64, 0x02, 0x19, 0x2E, 0x3E, 0x39 };
 
void setup() {
 Serial.begin(115200);
 while (!Serial) {  }

 delay(1000);
}

void loop(void){
 Serial.println("Temp Start");

 reDS18B20();   //温度取得要求
 delay(1000);

 Serial.println(getDS18B20C(temp0));
 Serial.println(getDS18B20C(temp1));
 Serial.println(getDS18B20C(temp2));
 delay(1000);
}

void reDS18B20(void){
 ds.reset();
 ds.write(0xCC, 1);
 ds.write(0x44, 1);
}

float getDS18B20C(byte *addr){
 byte i;
 byte present = 0;
 byte type_s;
 byte data[12];
 float celsius;
 
 present = ds.reset();
 ds.select(addr); 
 ds.write(0xBE);
  for ( i = 0; i < 9; i++) { // we need 9 bytes
    data[i] = ds.read();
  }

  int16_t raw = (data[1] << 8) | data[0];
  if (type_s) {
    raw = raw << 3;
    if (data[7] == 0x10) {
          raw = (raw & 0xFFF0) + 12 - data[6];
    }
  } else {
    byte cfg = (data[4] & 0x60);
      if (cfg == 0x00) raw = raw & ~7;    // 9 bit resolution, 93.75 ms
    else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
    else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
  }
  celsius = (float)raw / 16.0;
  return celsius;
}