#include <ESP8266WiFi.h>
#include <Modbus.h>
#include <ModbusIP_ESP8266.h>
#include <OneWire.h>
#include <DallasTemperature.h>

// Modbus Registers Offsets (0-9999)
const int TEST_HREG = 0;


#define ONE_WIRE_BUS 0  // DS18B20 pin //D3
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature DS18B20(&oneWire);

ModbusIP mb;

bool led;
  
void setup() {
  Serial.begin(115200);

  
  IPAddress ip(192,168,13,11);  //Node static IP
  IPAddress gateway(192,168,13,254);
  IPAddress subnet(255,255,255,0);

  WiFi.config(ip, gateway, subnet);
  
  mb.config("SSID", "password");
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print("."); 
  }
  
  Serial.println("");
  Serial.println("WiFi connected");  
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());


  mb.addHreg(TEST_HREG);

  pinMode(BUILTIN_LED, OUTPUT); 
  led=0;


}
 
void loop() {
   //Call once inside loop() - all magic here
   mb.task();

  float temp;
  int tmpi;

  if (led==0) {led=1;digitalWrite(BUILTIN_LED, HIGH);} else {led=0;digitalWrite(BUILTIN_LED, LOW);}
  Serial.print("LED: ");
  Serial.println(led);
  
  
  do {
    DS18B20.requestTemperatures(); 
    temp = DS18B20.getTempCByIndex(0);
    Serial.print("Temperature: ");
    Serial.println(temp);
  } while (temp == 85.0 );
  tmpi=(int) (temp*100);
  mb.Hreg(TEST_HREG, tmpi);  
  delay(2000);
  }