diff --git a/arduino/HalMultiSensor/Configuration.h b/arduino/HalMultiSensor/HalConfiguration.h
similarity index 88%
rename from arduino/HalMultiSensor/Configuration.h
rename to arduino/HalMultiSensor/HalConfiguration.h
index b84521d5..88a463f2 100755
--- a/arduino/HalMultiSensor/Configuration.h
+++ b/arduino/HalMultiSensor/HalConfiguration.h
@@ -1,5 +1,5 @@
-#ifndef CONFIGURATION_H
-#define CONFIGURATION_H
+#ifndef HALCONFIGURATION_H
+#define HALCONFIGURATION_H
 
 #include "Definitions.h"
 
@@ -23,4 +23,4 @@
 #define LIGHT_POL_MULTIPLE 1 // poling in seconds
 
 
-#endif //CONFIGURATION_H
\ No newline at end of file
+#endif // HALCONFIGURATION_H
\ No newline at end of file
diff --git a/arduino/HalMultiSensor/Definitions.h b/arduino/HalMultiSensor/HalDefinitions.h
similarity index 67%
rename from arduino/HalMultiSensor/Definitions.h
rename to arduino/HalMultiSensor/HalDefinitions.h
index 892f5336..926874b8 100755
--- a/arduino/HalMultiSensor/Definitions.h
+++ b/arduino/HalMultiSensor/HalDefinitions.h
@@ -1,5 +1,5 @@
-#ifndef DEFINITIONS_H
-#define DEFINITIONS_H
+#ifndef HALDEFINITIONS_H
+#define HALDEFINITIONS_H
 
 //////// PROTOCOLS
 #define PROT_NEXA_SELFLEARNING
@@ -11,4 +11,4 @@
 #define HW_PHOTOCELL
 
 
-#endif // DEFINITIONS_H
\ No newline at end of file
+#endif // HALDEFINITIONS_H
\ No newline at end of file
diff --git a/arduino/HalMultiSensor/HalInterfaces.h b/arduino/HalMultiSensor/HalInterfaces.h
new file mode 100755
index 00000000..4a3d104a
--- /dev/null
+++ b/arduino/HalMultiSensor/HalInterfaces.h
@@ -0,0 +1,40 @@
+#ifndef HALINTERFACES_H
+#define HALINTERFACES_H
+
+class HardwarePowerConsumption
+{
+public:
+    virtual void setup() = 0;
+    virtual int getConsumption() = 0;
+}
+
+class HardwareTemperature
+{
+public:
+    virtual void setup() = 0;
+    virtual int getTemperature() = 0;
+    virtual int getHumidity() = 0;
+}
+
+class HardwareLight
+{
+public:
+    virtual void setup() = 0;
+    virtual int getLuminosity() = 0;
+}
+
+class HardwareInterrupt
+{
+public:
+    virtual void interrupt(bool enable) = 0;
+}
+
+
+class Protocol
+{
+public:
+    virtual void setup() = 0;
+    virtual void send() = 0;
+}
+
+#endif // HALINTERFACES_H
\ No newline at end of file
diff --git a/arduino/HalMultiSensor/Protocol.h b/arduino/HalMultiSensor/Protocol.h
deleted file mode 100755
index c34487f0..00000000
--- a/arduino/HalMultiSensor/Protocol.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#ifndef PROTOCL_H
-#define PROTOCL_H
-
-#endif // PROTOCL_H
\ No newline at end of file