diff --git a/src/gateway/.vscode/.gitignore b/src/gateway/.vscode/.gitignore
new file mode 100644
index 0000000..31ea3ff
--- /dev/null
+++ b/src/gateway/.vscode/.gitignore
@@ -0,0 +1 @@
+./bin/
\ No newline at end of file
diff --git a/src/livb/.vscode/.gitignore b/src/livb/.vscode/.gitignore
new file mode 100644
index 0000000..31ea3ff
--- /dev/null
+++ b/src/livb/.vscode/.gitignore
@@ -0,0 +1 @@
+./bin/
\ No newline at end of file
diff --git a/src/livb/buz.h b/src/livb/buz.h
new file mode 100644
index 0000000..783bdd2
--- /dev/null
+++ b/src/livb/buz.h
@@ -0,0 +1,43 @@
+#ifndef __BUZ_H__
+#define __BUZ_H__
+
+class Buz{
+    public:
+    Buz(const int& pin){
+        this->_pin = pin;
+    };
+    ~Buz(){};
+
+    void ini(){
+        pinMode(this->_pin, OUTPUT);
+    };
+
+    void loop(){
+        if(millis() < this->_toT){
+            analogWrite(this->_pin, (int)((float)((this->_toT - millis()) % 3000) * 255 / 3000));
+            Serial.print(((int)((float)((this->_toT - millis()) % 3000) * 255 / 3000)));
+        }else{
+            analogWrite(this->_pin, 0);
+        }
+    };
+
+    inline void on(const int& t = 12*60*1000){
+        this->_toT = millis() + t;
+    }
+
+    inline void off(){
+        this->_toT = 0;
+    }
+
+    inline void once(const int& times = 4){
+        this->_toT = millis() + 3000 * times;
+    }
+
+    private:
+    static unsigned int _toT;
+    unsigned int _pin; 
+};
+
+unsigned int Buz::_toT = 0;
+
+#endif //__BUZ_H__
diff --git a/src/livb/led.h b/src/livb/led.h
new file mode 100644
index 0000000..79170b9
--- /dev/null
+++ b/src/livb/led.h
@@ -0,0 +1,77 @@
+#ifndef __LED_H__
+#define __LED_H__
+
+class LED {
+   public:
+
+    LED(const int& pin){
+        this->_pin = pin;
+        this->_mode = "null";
+    };
+    ~LED(){};
+
+    inline void on(){
+        digitalWrite(this->_pin, HIGH);
+        this->_mode = "null";
+    }
+
+    inline void off(){
+        digitalWrite(this->_pin, LOW);
+        this->_mode = "null";
+    }
+
+    inline const bool toggle(){
+        digitalWrite(this->_pin, !digitalRead(this->_pin));
+        this->_mode = "null";
+        return digitalRead(this->_pin);
+    }
+
+    inline void ini() const{
+        pinMode(this->_pin, OUTPUT);
+    }
+
+    inline void loop() const{
+        if(this->_mode == "null"){
+            return;
+        }
+
+        if(this->_mode == "star"){
+            if(millis() % this->_period < this->_period / 2){
+                digitalWrite(this->_pin, HIGH);
+            }else{
+                digitalWrite(this->_pin, LOW);
+            }
+        }
+
+        if(this->_mode == "breath"){
+            int val;
+            if(millis() % this->_period < this->_period / 2){
+                val = millis() % this->_period;
+                val = (float)val * 255 / (this->_period / 2);
+            }else{
+                val = this->_period - millis() % this->_period;
+                val = (float)val * 255 / (this->_period / 2);
+            }
+            analogWrite(this->_pin, val);
+        }
+
+    }
+
+    void star(const unsigned int& period = 2000){
+        this->_mode = "star";
+        this->_period = period;
+    }
+
+    void breath(const unsigned int& period = 3000){
+        this->_mode = "breath";
+        this->_period = period;
+    }
+
+   private:
+   unsigned short _pin;
+   String _mode;
+   unsigned int _period;
+
+};
+
+#endif  //__LED_H__
\ No newline at end of file
diff --git a/src/livb/livb.ino b/src/livb/livb.ino
new file mode 100644
index 0000000..8ee5694
--- /dev/null
+++ b/src/livb/livb.ino
@@ -0,0 +1,88 @@
+#include <PubSubClient.h>
+#include <ESP8266WiFi.h>
+
+#include "led.h"
+#include "buz.h"
+
+const char* ssid = "yimian-iot";
+const char* password = "1234567890.";
+const char* mqtt_server = "192.168.3.4";  // change this to the mqtt server
+
+const char* topicIn = "hass/ctl/liv/#";  // change this to the outgoing messages
+const String clientId = "liv";
+
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+Buz buz(D13);
+
+void setup() {
+    Serial.begin(115200);
+
+    WiFi.begin(ssid, password);
+
+    while (WiFi.status() != WL_CONNECTED) {
+        delay(500);
+        Serial.print(".");
+    }
+
+    Serial.println("");
+    Serial.println("WiFi connected");
+    Serial.println("IP address: ");
+    Serial.println(WiFi.localIP());
+    client.setServer(mqtt_server, 1883);  // default port, change it...
+    client.setCallback(callback);
+
+    buz.ini();
+}
+
+void callback(char* topic, byte* payload, unsigned int length) {
+    Serial.print("Message arrived [");
+    Serial.print(topic);
+    Serial.print("] ");
+    String s = "";
+    for (int i = 0; i < length; i++) {
+        Serial.print((char)payload[i]);
+        s += (char)payload[i];
+    }
+    Serial.println("");
+    if(s=="1"){
+      buz.once();
+    }else{
+      buz.off();
+    }
+    client.publish("hass/snsr/liv/light", s.c_str(), 1);
+}
+
+void reconnect() {
+    // Loop until we're reconnected
+    while (!client.connected()) {
+        Serial.print("Attempting MQTT connection...");
+
+        // Attempt to connect
+        if (client.connect(clientId.c_str())) {
+            Serial.println("connected");
+            // Once connected, publish an announcement...
+            // client.publish(topicOut, "Hello from the Gateway!");
+            // ... and resubscribe
+            client.subscribe(topicIn);
+        } else {
+            Serial.print("failed, rc=");
+            Serial.print(client.state());
+            Serial.println(" try again in 5 seconds");
+            // Wait 3 seconds before retrying
+            delay(3000);
+        }
+    }
+}
+
+void loop() {
+    if (!client.connected()) {
+        reconnect();
+    }
+    client.loop();
+
+    buz.loop();
+}
+
diff --git a/src/livb/switch.h b/src/livb/switch.h
new file mode 100644
index 0000000..e69de29