Code voor de Arduino:

#include<stdlib.h>                 //voor strings
#include <Arduino.h>
#include <DHT.h>
#include <Adafruit_BMP085.h>
#include <SoftwareSerial.h>

#include "SevenSegmentTM1637.h"
#define DEBUG 0                                     // change value to 1 to enable debuging using serial monitor

String IP = "184.106.153.149"; // ThingSpeak IP Address: 184.106.153.149
String GET = "GET /update?key=XXXXXXXXXXXXX";    // replace with your channel key
int count = 1;

long previousMillis = 0;        // will store last time Thingspeak was updated
// the follow variables is a long because the time, measured in miliseconds,
// will quickly become a bigger number than can be stored in an int.
long interval = 300000;           // interval at which to update (milliseconds) (5 minuten)

float temp;
float p;
float hum;
int h;

#define CLK 2
#define DIO 3

#define CLL 4
#define DIP 5

#define DHTTYPE DHT22   // DHT 11
#define DHTPIN 8     // what digital pin is DHT connected to
#define BLED 12      // Blauwe LED   pinMode(BLED, OUTPUT); //initialiseer pin 12 (BLAUWE LED).
#define WLED 11

Adafruit_BMP085 bmp;
DHT dht(DHTPIN, DHTTYPE);
SevenSegmentTM1637 tm1637(CLK, DIO);
SevenSegmentTM1637 tm1638(CLL, DIP);
//{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};
//0~9,A,b,C,d,E,F
SoftwareSerial mySerial(7, 6); // RX, TX

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  mySerial.begin(9600);
  delay(1000);

  tm1637.setBacklight(30);  // set the brightness to 100 %
  tm1638.setBacklight(30);  // set the brightness to 100 %

  delay(300); // Pauze om sensor stabiel te laten worden
  if (DEBUG) {
    Serial.println("Klaar om te beginnen...\r\n");
  }
  delay(700); // Nog een pauze (in totaal is 1sec nodig)

  if (!bmp.begin()) {
    if (DEBUG) {
      Serial.println("Could not find a valid BMP085 sensor, check wiring!");
    }
    while (1) {}
  }
  resetWiFi();
  tm1637.begin();            // initializes the display
  tm1637.print("INIT");      // display INIT on the display
  tm1638.begin();            // initializes the display
  tm1638.print("INIT");      // display INIT on the display

  delay(1000);
}

void loop() {
  byte  rawData;
  int disptemp;
  int har;
  int vocht;

  // put your main code here, to run repeatedly:

  //************************************************************************
  //*********** Temperatuur op display1 ************************************

  unsigned long currentMillis = millis();

  temp = dht.readTemperature();
  hum = dht.readHumidity();
  vocht = hum * 100;
  har = temp * 100;
  if (DEBUG) {
    Serial.print("Temp gelezen: ");
    Serial.println(temp);
    Serial.print("Vocht bewerkt:");
    Serial.println(vocht);
  }

  tm1637.clear();

  tm1637.setColonOn(1);
  rawData = B11100011;

  if (temp < 10)
  {
    tm1637.setCursor(0, 1);
  }
  else
  {
    tm1637.setCursor(0, 0);
  }
  if (temp < 0)
  {
    tm1637.setCursor(0, 0);
  }
  tm1637.print(har);
  tm1637.printRaw(rawData, 3);

  //*************************************************************************
  //*********  LUCHTDRUK op Display 2 ***************************************

  h = bmp.readPressure() / 100;
  for (int i = 0; i <= 4; i++) {
    tm1638.clear();
    tm1638.setColonOn(0);
    tm1638.print(h);

    delay(2000);
    // ******* En VOCHT ********************************************************
    tm1638.clear();
    tm1638.setColonOn(1);
    tm1638.print(vocht);
    //**************************************************************************
    //digitalWrite(BLED, HIGH);
    if (DEBUG) {
      Serial.println(i);
    }
    delay(2000);

  } //Einde FOR LOOP
  //**************************************************************************
  //**************************************************************************

  if (currentMillis - previousMillis > interval) {
    // save the last time you blinked the LED
    previousMillis = currentMillis;
    digitalWrite(BLED, HIGH);         //Even laten zien dat we data uploaden...
    
    String cmd = "AT+CIPSTART=\"TCP\",\"";// Setup TCP connection
    cmd += IP;
    cmd += "\",80";
    mySerial.println(cmd);
    delay(5000);
    if (mySerial.find("Error")) {
      if (DEBUG) {
        Serial.println("ERROR while SENDING");
      }
      digitalWrite(WLED, LOW);
      resetWiFi();
      return;
    }
    cmd = GET + "&field1=" + String(temp) + "&field2=" + String(hum) + +"&field3=" + String(h) + "\r\n";
    mySerial.print("AT+CIPSEND=");
    mySerial.println(cmd.length());
    delay(15000);
    if (mySerial.find(">"))
    {
      mySerial.print(cmd);
      if (DEBUG) {
        Serial.println("Data sent");
      }
    } else
    {
      mySerial.println("AT+CIPCLOSE");
      if (DEBUG) {
        Serial.println("Connection closed");
      }
    }
    digitalWrite(BLED, LOW);
  }

  //**************************************************************************

}

void clearRXbuffer() {
  while (mySerial.available()) {
    char c = mySerial.read();
    //Serial.write(c);
    delay(3);
  }
}

void sendWiFi(String s, bool clearBuffer) {
  mySerial.println(s);
  mySerial.println("");
  delay(100);

  if (clearBuffer) clearRXbuffer();
}

void resetWiFi() {
  unsigned long timout = 0 ;
  digitalWrite(WLED, LOW);
  Serial.println ("WiFi Reset ");
  // Wait for an IP address (WIFI GOT IP)
  char c, buffer[25];
  int i = 0, w = 0;

  do {
    if (millis() > timout) {
      clearRXbuffer();
      timout = millis() + 20000;
      delay(1000);
      sendWiFi("AT+RST", true);
    }

    if (mySerial.available()) {
      c = mySerial.read();
      if (c == 'W' || i >= 20) i = 0;
      if (c > 9 && c < 91) {
        buffer[i++] = c;
      }
    } //else displayLoop(w++);

    if (w > 11) w = 0;

  } while (strstr(buffer, "WIFI GOT IP") == NULL);

  digitalWrite(WLED, HIGH);
}