Arduion

#include <Wire.h>
#include <SPI.h>
#include <Adafruit_Sensor.h>
#include <Adafruit_BME280.h>
#include <PubSubClient.h>

//#include <Dhcp.h>
//#include <Dns.h>
#include <Ethernet.h>
#include <EthernetClient.h>
#include <EthernetServer.h>
#include <EthernetUdp.h>

#define BME280_ADRESA (0x76)
#define ETH_CS  10
#define SD_CS  4

Adafruit_BME280 bme;
byte mac[] = {0x32, 0x56, 0xAB, 0x10, 0x10, 0x1A};
char macstr[] = "3256AB10101A";
byte ip[] = {10, 0, 0, 177};

char servername[] = "quickstart.messaging.internetofthings.ibmcloud.com";
String clientName = String("d:quickstart:arduino:") + macstr;
String topicName = String("iot-2/evt/status/fmt/json");
EthernetClient ethClient;
PubSubClient client(servername, 1883, 0, ethClient);

double teplota;
double vlhkost;
double tlak;

void setup() {
  pinMode(ETH_CS,OUTPUT);
  pinMode(SD_CS,OUTPUT);
  digitalWrite(ETH_CS,LOW); //select the Ethernet Module
  digitalWrite(SD_CS,HIGH); //de-select the internal SD Card

  Serial.begin(9600);
  Serial.println("Načítání");
  if (!bme.begin(BME280_ADRESA)) {
    Serial.println("BME280 senzor nenalezen, zkontrolujte zapojeni!");
    while (1);
  }
  Serial.println("Senzor načten");

  Ethernet.begin(mac);
  Serial.println("Čeká se na IP");
  Serial.println(Ethernet.localIP());
}

void loop() {
  teplota = bme.readTemperature();
  vlhkost = bme.readHumidity();
  tlak = bme.readPressure();

  Serial.print("Teplota: ");
  Serial.print(teplota);
  Serial.println(" stupnu Celsia.");
  Serial.print("Relativni vlhkost: ");
  Serial.print(vlhkost);
  Serial.println(" %");
  Serial.print("Tlak: ");
  Serial.print(tlak / 100.0F);
  Serial.println(" hPa.");
  Serial.println();

  char clientStr[34];
  clientName.toCharArray(clientStr,34);
  char topicStr[26];
  topicName.toCharArray(topicStr,26);

  if (!client.connected()) {
    Serial.print("Trying to connect to: ");
    Serial.println(clientStr);
    client.connect(clientStr);
  }

  if (client.connected() ) {
    String json = buildJson(0.0);
    char jsonStr[200];
    json.toCharArray(jsonStr,200);
    boolean pubresult = client.publish(topicStr,jsonStr);
    Serial.print("Sending ");
    Serial.println(jsonStr);
    Serial.print("to ");
    Serial.println(topicStr);
    if (pubresult)
      Serial.println("SUCCESS\n");
    else
      Serial.println("NOT SUCCESSFULL\n");
  }
  delay(5000);
}

String buildJson(double temperature) {
  int uptime = millis()/1000/60.0;
  String data = "{";
  data += "\"d\":{";
  data += "\"name\": \"mega01\",";
  data += "\"temperature\": \"";
  data += (double)temperature;
  data += "\",";
  data += "\"uptime\": \"";
  data += (int)uptime;
  data += "\"}";
  data += "}";
  return data;
}