diff --git a/things/things.ino b/things/things.ino
index 5a032cc..85c8b1d 100644
--- a/things/things.ino
+++ b/things/things.ino
@@ -6,28 +6,23 @@
 #include "DeviceIrRx.h"
 #include "DeviceIrTx.h"
 
-// HAS_LED
-#define PIN_LED_RED D8
-#define PIN_LED_GREEN D6
-#define PIN_LED_BLUE D7
+const byte PIN_LED_RED = D8;
+const byte PIN_LED_GREEN = D6;
+const byte PIN_LED_BLUE = D7;
 DeviceLed deviceLed(PIN_LED_RED, PIN_LED_GREEN, PIN_LED_BLUE);
 
-// HAS_LDR
-#define PIN_LDR A0
+const byte PIN_LDR = A0;
 DeviceLdr deviceLdr(PIN_LDR);
 
-// HAS_DHT
-#define PIN_DHT D5
-#define TYPE_DHT DHT22
+const byte PIN_DHT = D5;
+const byte TYPE_DHT = DHT22;
 DeviceDht deviceDht(PIN_DHT, TYPE_DHT);
 
-// HAS_IRRX
-#define PIN_IRRX D1
-#define PIN_POWER D0
+const byte PIN_IRRX = D1;
+const byte PIN_POWER = D0;
 DeviceIrRx deviceIrRx(PIN_IRRX, PIN_POWER);
 
-// HAS_IRTX
-#define PIN_IRTX D2
+const byte PIN_IRTX = D2;
 DeviceIrTx deviceIrTx(PIN_IRTX);
 
 Device* devices[] = {