diff --git a/arduino/HC_SR04/HC_SR04.ino b/arduino/HC_SR04/HC_SR04.ino
new file mode 100644
index 0000000..6268d72
--- /dev/null
+++ b/arduino/HC_SR04/HC_SR04.ino
@@ -0,0 +1,35 @@
+#include <NewPing.h>
+
+#define TRIGGER_PIN 4
+
+#define ECHO_PIN 3
+
+#define MAX_DISTANCE 200
+
+NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);
+
+void setup() {
+
+Serial.begin(9600);
+
+}
+
+void loop() {
+
+delay(50);
+
+unsigned int uS = sonar.ping();
+
+pinMode(ECHO_PIN,OUTPUT);
+
+digitalWrite(ECHO_PIN,LOW);
+
+pinMode(ECHO_PIN,INPUT);
+
+Serial.print("Ping: ");
+
+Serial.print(uS / US_ROUNDTRIP_CM);
+
+Serial.println("cm");
+
+}
diff --git a/arduino/Ultrasonic_Sensor/Ultrasonic_Sensor.ino b/arduino/Ultrasonic_Sensor/Ultrasonic_Sensor.ino
new file mode 100644
index 0000000..6ae405f
--- /dev/null
+++ b/arduino/Ultrasonic_Sensor/Ultrasonic_Sensor.ino
@@ -0,0 +1,35 @@
+// defines pins numbers
+const int trigPin = 2;  //D4
+const int echoPin = 0;  //D3
+
+// defines variables
+long duration;
+int distance;
+
+void setup() {
+pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
+pinMode(echoPin, INPUT); // Sets the echoPin as an Input
+Serial.begin(9600); // Starts the serial communication
+}
+
+void loop() {
+// Clears the trigPin
+digitalWrite(trigPin, LOW);
+delayMicroseconds(2);
+
+// Sets the trigPin on HIGH state for 10 micro seconds
+digitalWrite(trigPin, HIGH);
+delayMicroseconds(10);
+digitalWrite(trigPin, LOW);
+
+// Reads the echoPin, returns the sound wave travel time in microseconds
+duration = pulseIn(echoPin, HIGH);
+
+// Calculating the distance
+distance= duration*0.034/2;
+// Prints the distance on the Serial Monitor
+Serial.print("Distance: ");
+Serial.println(distance);
+delay(2000);
+}
+
diff --git a/arduino/wlan_2bewegungssensoren/wlan_2bewegungssensoren.ino b/arduino/wlan_2bewegungssensoren/wlan_2bewegungssensoren.ino
new file mode 100644
index 0000000..8271533
--- /dev/null
+++ b/arduino/wlan_2bewegungssensoren/wlan_2bewegungssensoren.ino
@@ -0,0 +1,77 @@
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+
+const char* SSID = "smartroom";
+const char* PSK = "smarthome";
+const char* MQTT_BROKER = "192.168.4.1";
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+// defines pins numbers
+int ledPin = D1;  // LED on Pin 1 of ESP
+int pirPin1 = D0; // Input for HC-SR501  #1
+int pirPin2 = D2; // Input for HC-SR501  #2
+int pirValueNeu1; // Place to read PIR Value
+int pirValueAlt1 = 0; //Place to store read PIR Value
+int pirAn1;
+int pirAus1;
+int pirValueNeu2; // Place to read PIR Value
+int pirValueAlt2 = 0; //Place to store read PIR Value
+int pirAn2;
+int pirAus2;
+
+char msg[50];
+
+
+void setup() {
+  Serial.begin(115200);
+  setup_wifi();
+  client.setServer(MQTT_BROKER, 1883); 
+  pinMode(ledPin, OUTPUT);
+  pinMode(pirPin1, INPUT);
+  pinMode(pirPin2, INPUT);
+  digitalWrite(ledPin, LOW);
+}
+
+void setup_wifi() {
+  delay(10);
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(SSID);
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(SSID, PSK);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void reconnect() {
+    while (!client.connected()) {
+        Serial.print("Reconnecting...");
+        if (!client.connect("ESP8266Client")) {
+            Serial.print("failed, rc=");
+            Serial.print(client.state());
+            Serial.println(" retrying in 5 seconds");
+            delay(5000);
+        }
+    }
+}
+
+
+void loop() {
+
+  if((distance!=(distance_alt-1))&&(distance!=(distance_alt))&&(distance!=(distance_alt+1))){//+-1 um störungen herauszufiltern
+    snprintf (msg,50,"%d", distance);
+    Serial.print("Publish Motion: ");
+    Serial.println(msg);
+    client.publish("/home/data", msg);
+    delay(500);
+  }
+}
diff --git a/arduino/wlan_ultraschall/wlan_ultraschall.ino b/arduino/wlan_ultraschall/wlan_ultraschall.ino
new file mode 100644
index 0000000..4b9e2da
--- /dev/null
+++ b/arduino/wlan_ultraschall/wlan_ultraschall.ino
@@ -0,0 +1,92 @@
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+
+const char* SSID = "smartroom";
+const char* PSK = "smarthome";
+const char* MQTT_BROKER = "192.168.4.1";
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+// defines pins numbers
+const int trigPin = 2;  //D4
+const int echoPin = 0;  //D3
+
+long duration;
+int distance;
+int distance_alt=0;
+char msg[50];
+int value = 0;
+long lastMsg = 0;
+
+void setup() {
+  pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
+  pinMode(echoPin, INPUT); // Sets the echoPin as an Input
+
+  Serial.begin(115200);
+  setup_wifi();
+  client.setServer(MQTT_BROKER, 1883);
+}
+
+void setup_wifi() {
+  delay(10);
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(SSID);
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(SSID, PSK);
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
+void reconnect() {
+    while (!client.connected()) {
+        Serial.print("Reconnecting...");
+        if (!client.connect("ESP8266Client")) {
+            Serial.print("failed, rc=");
+            Serial.print(client.state());
+            Serial.println(" retrying in 5 seconds");
+            delay(5000);
+        }
+    }
+}
+
+
+void loop() {
+  
+    if (!client.connected()) {
+        reconnect();
+    }
+    client.loop();
+ 
+  // Clears the trigPin
+  digitalWrite(trigPin, LOW);
+  delayMicroseconds(2);
+
+  // Sets the trigPin on HIGH state for 10 micro seconds
+  digitalWrite(trigPin, HIGH);
+  delayMicroseconds(10);
+  digitalWrite(trigPin, LOW);
+
+  // Reads the echoPin, returns the sound wave travel time in microseconds
+  duration = pulseIn(echoPin, HIGH);
+
+  // Calculating the distance
+  distance = duration * 0.034 / 2;
+  // Prints the distance on the Serial Monitor
+  if((distance!=(distance_alt-1))&&(distance!=(distance_alt))&&(distance!=(distance_alt+1))){//+-1 um störungen herauszufiltern
+    snprintf (msg,50,"%d", distance);
+    Serial.print("Publish Motion: ");
+    Serial.println(msg);
+    client.publish("/home/data", msg);
+    delay(500);
+  }
+  distance_alt=distance;
+}