diff --git a/README.md b/README.md
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+++ b/README.md
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 # fantube
 
-Device that regulates fan speed and damper in the tube depending on temperature
\ No newline at end of file
+Device that regulates fan speed and damper in the tube depending on temperature
+
+![fantube](https://dev.ussr.win/microcontrollers/fantube/raw/branch/master/fantube_agg.jpg)
+
+![fantube](https://dev.ussr.win/microcontrollers/fantube/raw/branch/master/fantube_bb.jpg)
+
diff --git a/fantube.fzz b/fantube.fzz
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diff --git a/fantube.ino b/fantube.ino
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+++ b/fantube.ino
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+#include <Thread.h>
+#include <Servo.h>
+#include <dht11.h> // https://github.com/adidax/dht11
+#include "HCMotor.h" // https://github.com/HobbyComponents/HCMotor/
+#define DHT11PIN 4 // DHT11 - PIN 4
+#define FANPIN 5 // IRF520 MOS Driver - PIN 5
+#define SERVOPIN 6 // Servo - PIN 6
+Servo myservo;
+HCMotor fan;
+dht11 DHT11;
+int currenttemp = 0;
+int currenthum = 0;
+int fanstatus = 0;
+int damperpos = 0;
+bool damperstatus = false; // false - damper closed; true - damper opened
+Thread checkSensorThread = Thread();
+Thread ledThread = Thread();
+
+void setup() {
+  Serial.begin(9600);
+  pinMode(LED_BUILTIN, OUTPUT);
+  digitalWrite(LED_BUILTIN, LOW);
+  checkSensorThread.onRun(sensorDataCheck);
+  checkSensorThread.setInterval(60000);
+  ledThread.onRun(ledBlink);
+  ledThread.setInterval(2000);
+  fan.Init();
+  fan.attach(0, DCMOTOR, FANPIN);
+  fan.DutyCycle(0, 100); // min and max fan rotation
+  delay(2222);
+  sensorDataCheck();
+  damperOpen();
+  fanSpeed(0);
+}
+
+void loop()
+{
+  if (checkSensorThread.shouldRun())
+    checkSensorThread.run();
+  if (ledThread.shouldRun())
+    ledThread.run();
+}
+
+void sensorDataCheck()
+{ 
+  sensorDataRead();
+  serPrintHumTemp();
+  if (currenttemp < 5) {
+    if (damperstatus) damperClose(); // <5 - damper close
+  } else if (!damperstatus) damperOpen(); // >4 - damper open
+  if (currenttemp > 25) {
+    if (currenttemp > 30) {
+      if (currenttemp > 35) {
+        if (currenttemp > 40) { fanSpeed(100); // >40 - fan full
+        } else fanSpeed(75); // >35 - fan three quarters
+      } else fanSpeed(50); // >30 - fan half
+    } else fanSpeed(30); // >25 - fan third
+  } else fanSpeed(0); // <26 - fan off
+}
+
+void ledBlink() {
+  static bool ledStatus = false;
+  ledStatus = !ledStatus;
+  digitalWrite(LED_BUILTIN, ledStatus);
+}
+
+void sensorDataRead()
+{
+  int chk = DHT11.read(DHT11PIN);
+  currenthum = DHT11.humidity;
+  if (currenthum == 0)
+  {
+    for (int i=0; i<=5; i++)
+    {
+      delay(111);
+      chk = DHT11.read(DHT11PIN);
+      currenthum = DHT11.humidity;
+      if (currenthum > 0) i = 5;
+    }
+  }
+  currenttemp = DHT11.temperature;
+}
+
+void damperClose()
+{
+  myservo.attach(SERVOPIN);
+  delay(55);
+  for (damperpos = 0; damperpos <= 90; damperpos += 1)
+  {
+    myservo.write(damperpos);
+    delay(25);
+  }
+  delay(55);
+  myservo.detach();
+  damperstatus = false;
+}
+
+void damperOpen()
+{
+  myservo.attach(SERVOPIN);
+  delay(55);
+  for (damperpos = 90; damperpos >= 0; damperpos -= 1)
+  {
+    myservo.write(damperpos);
+    delay(15);
+  }
+  delay(55);
+  myservo.detach();
+  damperstatus = true;
+}
+
+void fanSpeed(int fanrate)
+{
+  fan.OnTime(0, fanrate);
+  fanstatus = fanrate;
+}
+
+void serPrintHumTemp()
+{
+  Serial.print("temp: ");
+  Serial.print(currenttemp);
+  Serial.print("; hum: ");
+  Serial.println(currenthum);
+}
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diff --git a/fantube_bb.jpg b/fantube_bb.jpg
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