diff --git a/Software/TempSender/TempSender.ino b/Software/TempSender/TempSender.ino
new file mode 100644
index 0000000..e60a414
--- /dev/null
+++ b/Software/TempSender/TempSender.ino
@@ -0,0 +1,116 @@
+/*
+ *  Demonstrates how to use Read Buttons in conjunction with SoftRS485:
+ *
+ * If a button is pressed, a corresponding flag is set.
+ * The main loop checks for the state of those flags and
+ * sends a message on the RS485 bus whenever a flag is set.
+ */
+
+// include the library code:
+#include <SoftRS485.h>
+#include <AM2302-Sensor.h>
+
+#define PROGRAM "RS485-Nano 2.0 / TempSender 1.1"
+
+#define BTN_INT 2 // button interrupt pin
+#define Max485_RO 3 // read-output of Max485
+#define Max485_RE 5 // not-read-enable of Max485
+#define Max485_DE 9 // data enable of Max485
+#define Max485_DI 8 // data input of Max485
+#define DHT_PIN 4
+#define TRESHOLD 100000 // 100ms
+#define PERIOD   100000000 // 100s
+#define ID 3
+// 0=Test
+// 1=Arbeitszimmer
+// 2=Küche
+// 3=Bad
+
+//#define LOG_TO_SERIAL
+#define SEND_485
+
+AM2302::AM2302_Sensor am2302{DHT_PIN};
+
+boolean states[8];
+unsigned long times[8];
+unsigned long sensor_time = PERIOD;
+
+
+void setup(){
+  Serial.begin(115200);
+  am2302.begin();
+  init485(Max485_RO,Max485_RE,Max485_DE,Max485_DI); // library initialization:
+  pinMode(BTN_INT,INPUT_PULLUP);
+  pinMode(14,INPUT_PULLUP);
+  pinMode(15,INPUT_PULLUP);
+  pinMode(16,INPUT_PULLUP);
+  pinMode(17,INPUT_PULLUP);
+  pinMode(18,INPUT_PULLUP);
+  pinMode(19,INPUT_PULLUP);
+  pinMode(20,INPUT_PULLUP);
+  pinMode(21,INPUT_PULLUP);
+
+  attachInterrupt(digitalPinToInterrupt(2),isr,FALLING);
+  // Print a message to the LCD.
+  Serial.println(PROGRAM);
+#ifdef LOG_TO_SERIAL
+  Serial.println("14 15 16 17 18 19 20 21");
+#endif
+}
+
+void isr(){
+  states[0] = !digitalRead(14);
+  states[1] = !digitalRead(15);
+  states[2] = !digitalRead(16);
+  states[3] = !digitalRead(17);
+
+  states[4] = !digitalRead(18);
+  states[5] = !digitalRead(19);
+  states[6] = !(analogRead(20)>200);
+  states[7] = !(analogRead(21)>200);
+#ifdef LOG_TO_SERIAL
+  for (int i=0;i<8;i++){
+    Serial.print(" "); Serial.print(states[i]); Serial.print(" ");
+  }
+  Serial.println();
+#endif
+}
+
+#ifdef SEND_485
+void send(int btn){
+  String s = "{nano:"+String(ID)+",btn:"+String(btn)+"}";
+  for (int i = 0; i<10; i++){
+    if (send485(s.c_str())) break;
+    Serial.println("collision detected, trying again:");
+  }
+}
+#endif
+
+void loop(){
+  unsigned long now = micros();
+  for (int i=0;i<8;i++){
+    if (states[i]){
+      delay(1);
+      if (now - times[i] > TRESHOLD){
+#ifdef SEND_485
+        send(i+1);
+#endif
+        times[i] = now;
+      }
+      states[i] = 0;
+    }
+  }
+
+  if (now - sensor_time > PERIOD){
+    sensor_time = now;
+    auto status = am2302.read();
+    if (status == 0){
+      String s = "{nano:"+String(ID)+",temp:"+String(am2302.get_Temperature())+",humi:"+String(am2302.get_Hunidity())+"}";
+      send485(s.c_str());
+#ifdef LOG_TO_SERIAL
+      Serial.println(s);
+#endif
+    }
+  }
+  
+}