diff --git a/gateway/include/Protocol_1.h b/gateway/include/Protocol_1.h
index ee77167..70d7817 100644
--- a/gateway/include/Protocol_1.h
+++ b/gateway/include/Protocol_1.h
@@ -1,9 +1,6 @@
 #pragma once
 #include "Protocol.h"
-
-#define RC_STATE(value) value & 0x1
-#define RC_DEVICE(value) (value >> 1) & 0x1F
-#define RC_GROUP(value) (value >> 6) & 0x1F
+#include "Decoder.h"
 
 class Protocol_1 : public Protocol {
 
@@ -29,41 +26,4 @@ public:
         rcSwitch["channel"] = decoder.device;
         rcSwitch["raw_value"] = value;
     }
-
-private:
-    struct Decoder {
-        bool state;
-        char group;
-        byte device;
-
-        void decode(unsigned long value) {
-            value = value >> 2;
-            unsigned long res = 0;
-            for (int i = 0; i < 12; i++) {
-                res |= ((value & 1) ^ 1) << i;
-                value = value >> 2;
-            }
-
-            state = RC_STATE(res);
-            group = RC_GROUP(res);
-            switch (RC_DEVICE(res)) {
-            case 0b10000:
-                device = 1;
-                break;
-            case 0b01000:
-                device = 2;
-                break;
-            case 0b00100:
-                device = 3;
-                break;
-            case 0b00010:
-                device = 4;
-                break;
-            case 0b00001:
-                device = 5;
-                break;
-            }
-        }
-    };
 };
-
diff --git a/gateway/include/decoder.h b/gateway/include/decoder.h
new file mode 100644
index 0000000..37e9eac
--- /dev/null
+++ b/gateway/include/decoder.h
@@ -0,0 +1,38 @@
+#define RC_STATE(value) value & 0x1
+#define RC_DEVICE(value) (value >> 1) & 0x1F
+#define RC_GROUP(value) (value >> 6) & 0x1F
+
+struct Decoder {
+    bool state;
+    char group;
+    unsigned char device;
+
+    void decode(unsigned long value) {
+        value = value >> 2;
+        unsigned long res = 0;
+        for (int i = 0; i < 12; i++) {
+            res |= ((value & 1) ^ 1) << i;
+            value = value >> 2;
+        }
+
+        state = RC_STATE(res);
+        group = RC_GROUP(res);
+        switch (RC_DEVICE(res)) {
+        case 0b10000:
+            device = 1;
+            break;
+        case 0b01000:
+            device = 2;
+            break;
+        case 0b00100:
+            device = 3;
+            break;
+        case 0b00010:
+            device = 4;
+            break;
+        case 0b00001:
+            device = 5;
+            break;
+        }
+    }
+};
diff --git a/gateway/platformio.ini b/gateway/platformio.ini
index 5d8e537..2afa12c 100644
--- a/gateway/platformio.ini
+++ b/gateway/platformio.ini
@@ -21,3 +21,6 @@ lib_deps =
 	adafruit/DHT sensor library@1.3.10
 build_flags = -D DHT_SENSOR=0
 upload_port = /dev/ttyUSB0
+
+[env:native]
+platform = native
diff --git a/gateway/test/test_decoder.cpp b/gateway/test/test_decoder.cpp
new file mode 100644
index 0000000..32ba2d7
--- /dev/null
+++ b/gateway/test/test_decoder.cpp
@@ -0,0 +1,36 @@
+#include <unity.h>
+#include "Decoder.h"
+
+
+void setUp(void) {
+    // set stuff up here
+}
+
+void tearDown(void) {
+    // clean stuff up here
+}
+
+void test_1_2_on(void) {
+    Decoder d;
+    d.decode(5574993);
+    TEST_ASSERT_EQUAL(true, d.state);
+    TEST_ASSERT_EQUAL(1, d.group);
+    TEST_ASSERT_EQUAL(2, d.device);
+}
+
+void test_1_1_off(void) {
+    Decoder d;
+    d.decode(5571924);
+    TEST_ASSERT_EQUAL(false, d.state);
+    TEST_ASSERT_EQUAL(1, d.group);
+    TEST_ASSERT_EQUAL(1, d.device);
+}
+
+int main(int argc, char **argv) {
+    UNITY_BEGIN();
+    RUN_TEST(test_1_2_on);
+    RUN_TEST(test_1_1_off);
+    UNITY_END();
+
+    return 0;
+}