1-wire temperture "DS18B20" + LoRaWAN Shield

DS18B20_LoRaWAN.ino

/* ** Hardware setup **
 * Arduino UNO R3 + LoRaWAN Shield + DS18B20
 * 
 *         VCC(red) ------+---- 5V
 *                        |
 *  DS18B20              10K        Arduino
 *                        |
 *         BUS(yellow) ---+---- 6
 *         GND(black) --------- GND
 */
/* ** Software setup **
 * OneWire: https://github.com/adafruit/MAX31850_OneWire
 * DallasTemperature : https://github.com/adafruit/MAX31850_DallasTemp
 */

#define ONE_WIRE_BUS  6 // 1-wire bus(data) port
#define INTERVAL 4800 /* msec */

#include <OneWire.h>
#include <DallasTemperature.h>
#include <lorawan_client.h>
LoRaWANClient lorawanClient;

OneWire oneWire(ONE_WIRE_BUS);
#define SENSER_BIT   11 // precision
DallasTemperature temper(&oneWire);

boolean usingLoRaWAN = false;

void setup(void) {
  Serial.begin(9600);
  temper.setResolution(SENSER_BIT);
  pinMode(13, OUTPUT);

  if (usingLoRaWAN) {
    if (!lorawanClient.connect()) {
      Serial.println(" failed to connect. Halt...");
      for(;;){};
    }
  }
}

void loop(void) {
  temper.requestTemperatures();
  float t = temper.getTempCByIndex(0);
  char buf[10];
  dtostrf(t, 4, 1, buf);
  char json[16];
  sprintf(json, "{\"t\":%s}", buf);
  Serial.println(json);
  if (usingLoRaWAN) {
    lorawanClient.sendData(json);
    digitalWrite(13, LOW);
    for (int i = 0 ; i < 2 ; i++) {
      digitalWrite(13, HIGH);
      delay(100);
      digitalWrite(13, LOW);
      delay(100);
    }
    digitalWrite(13, LOW);
  }
  delay(INTERVAL);
}