diff --git a/src/ArduinoHA.h b/src/ArduinoHA.h
new file mode 100644
index 0000000..673848d
--- /dev/null
+++ b/src/ArduinoHA.h
@@ -0,0 +1,2 @@
+#include "HADevice.h"
+#include "HAMqtt.h"
diff --git a/src/ArduinoHADefines.h b/src/ArduinoHADefines.h
new file mode 100644
index 0000000..fe4420a
--- /dev/null
+++ b/src/ArduinoHADefines.h
@@ -0,0 +1,4 @@
+// Turns on debug information of the ArduinoHA core.
+// Please note that you need to initialize serial interface manually
+// by calling Serial.begin([baudRate]) before initializing ArduinoHA.
+#define ARDUINOHA_DEBUG
diff --git a/src/HADevice.cpp b/src/HADevice.cpp
new file mode 100644
index 0000000..8327c5e
--- /dev/null
+++ b/src/HADevice.cpp
@@ -0,0 +1,54 @@
+#include "HADevice.h"
+
+HADevice::HADevice(const char* uniqueId) :
+    _uniqueId(uniqueId),
+    _manufacturer(nullptr),
+    _model(nullptr),
+    _name(nullptr),
+    _softwareVersion(nullptr),
+    _viaDevice(nullptr)
+{
+
+}
+
+String HADevice::serialize() const
+{
+    String output;
+    output.concat("{");
+    output.concat("{\"identifiers\":\"");
+    output.concat(_uniqueId);
+    output.concat("\"}");
+
+    if (_manufacturer != nullptr) {
+        output.concat(",{\"manufacturer\":\"");
+        output.concat(_manufacturer);
+        output.concat("\"}");
+    }
+
+    if (_model != nullptr) {
+        output.concat(",{\"model\":\"");
+        output.concat(_model);
+        output.concat("\"}");
+    }
+
+    if (_name != nullptr) {
+        output.concat(",{\"name\":\"");
+        output.concat(_name);
+        output.concat("\"}");
+    }
+
+    if (_softwareVersion != nullptr) {
+        output.concat(",{\"sw_version\":\"");
+        output.concat(_softwareVersion);
+        output.concat("\"}");
+    }
+
+    if (_viaDevice != nullptr) {
+        output.concat(",{\"via_device\":\"");
+        output.concat(_viaDevice);
+        output.concat("\"}");
+    }
+
+    output += "}";
+    return output;
+}
diff --git a/src/HADevice.h b/src/HADevice.h
new file mode 100644
index 0000000..a4c7fd1
--- /dev/null
+++ b/src/HADevice.h
@@ -0,0 +1,40 @@
+#ifndef HADEVICE_H
+#define HADEVICE_H
+
+#include <Arduino.h>
+
+class HADevice
+{
+public:
+    HADevice(const char* uniqueId);
+
+    inline const char* getUniqueId() const
+        { return _uniqueId; }
+
+    inline void setManufacturer(const char* manufacturer)
+        { _manufacturer = manufacturer; }
+
+    inline void setModel(const char* model)
+        { _model = model; }
+
+    inline void setName(const char* name)
+        { _name = name; }
+
+    inline void setSoftwareVersion(const char* softwareVersion)
+        { _softwareVersion = softwareVersion; }
+
+    inline void setViaDevice(const char* viaDevice)
+        { _viaDevice = viaDevice; }
+
+    String serialize() const;
+
+private:
+    const char* _uniqueId;
+    const char* _manufacturer;
+    const char* _model;
+    const char* _name;
+    const char* _softwareVersion;
+    const char* _viaDevice;
+};
+
+#endif