wemos_d1_mini_ds18b20_influx

#include <InfluxDbClient.h>
#include <ESP8266WiFiMulti.h>
ESP8266WiFiMulti wifiMulti;

#include <OneWire.h>
#include <DallasTemperature.h>

#define ONE_WIRE_BUS D5
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

union
{
 uint64_t the_long_long;
 uint32_t the_longs[2];
 uint8_t the_shorts[8];
} devAddr;

int status = WL_IDLE_STATUS;     // the Wifi radio's status

// fill in the blanks...
#define WIFI_SSID ""
#define WIFI_PASSWORD ""
#define INFLUXDB_URL ""
#define INFLUXDB_DB_NAME ""

// Single InfluxDB instance
InfluxDBClient client(INFLUXDB_URL, INFLUXDB_DB_NAME);

// Define data point with measurement name 'device_status`
Point point("temperature");

int16_t i, j;
char query[160];

uint32_t lasttime;

void setup()
{
  char dummytext[20];

  Serial.begin(115200); //Begin serial communication
  Serial.println("Arduino Digital Temperature // Serial Monitor Version");
  pinMode(D2, OUTPUT);

  // Connect WiFi
  Serial.println("Connecting to WiFi");
  WiFi.mode(WIFI_STA);
  wifiMulti.addAP(WIFI_SSID, WIFI_PASSWORD);
  while (wifiMulti.run() != WL_CONNECTED)
  {
    Serial.print(".");
    delay(100);
  }
  Serial.print ( "IP address: " );
  Serial.println ( WiFi.localIP() );

  // Check server connection
  if (client.validateConnection())
  {
    Serial.print("Connected to InfluxDB: ");
    Serial.println(client.getServerUrl());
  }
  else
  {
    Serial.print("InfluxDB connection failed: ");
    Serial.println(client.getLastErrorMessage());
  }

  // check the real time on the internet
  timeSync("UTC", "se.pool.ntp.org", "pool.ntp.org");

  oneWire.reset() ;
  lasttime = millis();

  // try to find all one-wire sensors in the system
  sensors.begin();
  Serial.print(sensors.getDS18Count());
  Serial.println(" devices found");
  for (i=0; i<sensors.getDS18Count(); i++)
  {
    sensors.getAddress(devAddr.the_shorts, i);
    sprintf(query,"-x 0x%8lx%8lx",devAddr.the_longs[1],devAddr.the_longs[0]);
    Serial.println(query);
    sprintf(query,"-ll %llu",devAddr.the_long_long);
    Serial.println(query);
  }
}

void loop()
{
  digitalWrite(D2, LOW);     // turn the LED on
  delay(10);                 // wait for a second
  digitalWrite(D2, HIGH);    // turn the LED off

  Serial.print(".");
  if ((millis()-lasttime) > 10000)
  {
    lasttime = millis();

    // start conversion on all attached sensors at the same time
    sensors.requestTemperatures();

    for (i=0; i<sensors.getDS18Count(); i++)
    {
      sensors.getAddress(devAddr.the_shorts, i);

      // Add data
      point.clearTags();
      point.clearFields();
      sprintf(query,"%llu", devAddr.the_long_long);
      point.addTag("sensorID", query);
      point.addField("value", sensors.getTempCByIndex(i));

      // Write data
      Serial.print("Writing: ");
      Serial.println(point.toLineProtocol());

      // If no Wifi signal: reconnect
      if ((WiFi.RSSI() == 0) && (wifiMulti.run() != WL_CONNECTED))
      {
        Serial.println("Wifi connection lost");
      }

      // Write point
      if (!client.writePoint(point))
      {
        Serial.print("InfluxDB write failed: ");
        Serial.println(client.getLastErrorMessage());
      }
    }
  }
  delay(500);              // wait for a second
}