diff --git a/platformio.ini b/platformio.ini
index 5442b89..6906272 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -227,6 +227,11 @@ build_flags =
     -D dataPIR_readdelay=100
     -D dataPIR_senddelaymax=1000*60*10
 
+    -D SENSOR_RADAR
+    -D RADARPIN=D5
+    -D dataRADAR_readdelay=100
+    -D dataRADAR_senddelaymax=1000*60*10
+
     -D SENSOR_BH1750
     -D dataBH1750_minchange=10.0
     -D dataBH1750_senddelaymax=1000*60*2
diff --git a/src/main.cpp b/src/main.cpp
index 512fc51..a8663e9 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -94,6 +94,13 @@ struct sensordata
   bool value_PIR=false;
 #endif
 
+#ifdef SENSOR_RADAR
+  // High/Low Output Radar Sensor
+  // For example: RCWL-0516 (needs 5v input (gnd, vin), 3.3v output level. high for 2seconds when movement detected)
+  sensordata dataRADAR;
+  bool value_RADAR=false;
+#endif
+
 
 #ifdef SENSOR_LDR
   struct sensordata dataLDR;
@@ -334,6 +341,17 @@ void setup() {
     #endif
   #endif
 
+    #ifdef SENSOR_RADAR
+    Serial.println("initializing radar");
+    pinMode(RADARPIN, INPUT);
+    #ifdef dataRADAR_readdelay
+    dataRADAR.readdelay=dataRADAR_readdelay;
+    #endif
+    #ifdef dataRADAR_senddelaymax
+    dataRADAR.senddelaymax=dataRADAR_senddelaymax;
+    #endif
+  #endif
+
   #ifdef SENSOR_LDR
     Serial.println("initializing ldr");
     pinMode(LDR_PIN, INPUT); //ldr
@@ -480,6 +498,10 @@ void setup() {
     sensorNode.advertise("motion");
   #endif
 
+  #ifdef SENSOR_RADAR
+    sensorNode.advertise("radar");
+  #endif
+
   #ifdef SENSOR_BMP180
     sensorNode.advertise("temperature");
     sensorNode.advertise("pressure");
@@ -799,6 +821,36 @@ void loop_PIR()
 }
 #endif
 
+
+#ifdef SENSOR_RADAR
+void loop_RADAR()
+{
+  sensordata &d=dataRADAR;
+  bool _changed=false;
+  if (millis() >= (d.lastreadtime+d.readdelay)) {
+     if (digitalRead(RADARPIN) != value_RADAR){
+       _changed=true;
+     }
+     d.lastreadtime=millis();
+  }
+  if (_changed || millis() >= (d.lastsent+d.senddelaymax)) { //send current value after some long time
+    Serial.print("Sending motion radar. reason=");
+    if (_changed) Serial.println("change"); else Serial.println("time");
+
+    if (digitalRead(RADARPIN)){
+       Homie.getLogger() << "radar " << ": " << "true" << endl;
+       sensorNode.setProperty("radar").send(String("true"));
+       value_RADAR=true;
+     }else{
+       Homie.getLogger() << "motion " << ": " << "false" << endl;
+       sensorNode.setProperty("radar").send(String("false"));
+       value_RADAR=false;
+     }
+     d.lastsent=millis();
+  }
+}
+#endif
+
 #ifdef SENSOR_MHZ19
 void loop_MHZ19()
 {
@@ -1126,6 +1178,10 @@ void loopHandler() {
     loop_PIR();
   #endif
 
+  #ifdef SENSOR_RADAR
+    loop_RADAR();
+  #endif
+
   #ifdef SENSOR_MHZ19
     loop_MHZ19();
   #endif