diff --git a/Software/platformio.ini b/Software/platformio.ini
index 05e02db..b7c46aa 100644
--- a/Software/platformio.ini
+++ b/Software/platformio.ini
@@ -32,12 +32,13 @@ build_flags =
   -DWIFI_AP_PASSWORD=${wifi_cred.wifi_ap_password}
   -DWIFI_AP_IP_GW=10,0,0,1
   -DATOMIC_FS_UPDATE
-  -DFEATURE_ENABLE_WIFI_CLIENT
+  ;-DFEATURE_ENABLE_WIFI_CLIENT
   -DFEATURE_ENABLE_OLED
+  ;-DFEATURE_ENABLE_TIMER
   -DFEATURE_ENABLE_CAN
   ;-DFEATURE_ENABLE_GPS
   -DFEATURE_ENABLE_WEBSOCKETS
-  -DPCB_REV=4
+  -DPCB_REV=3
   ;-DNO_MODE_FLASH
 
 ;build_type = debug
diff --git a/Software/src/config.h b/Software/src/config.h
index b0bd76e..175b3db 100644
--- a/Software/src/config.h
+++ b/Software/src/config.h
@@ -16,7 +16,9 @@
 
 typedef enum SpeedSource_e
 {
+#ifdef FEATURE_ENABLE_TIMER
   SOURCE_TIME,
+#endif
   SOURCE_IMPULSE,
 #ifdef FEATURE_ENABLE_GPS
   SOURCE_GPS,
@@ -27,7 +29,9 @@ typedef enum SpeedSource_e
 } SpeedSource_t;
 
 const char SpeedSourceString[][8] = {
+#ifdef FEATURE_ENABLE_TIMER
     "Timer",
+#endif
     "Impuls",
 #ifdef FEATURE_ENABLE_GPS
     "GPS",
diff --git a/Software/src/main.cpp b/Software/src/main.cpp
index 1061f77..843e139 100644
--- a/Software/src/main.cpp
+++ b/Software/src/main.cpp
@@ -101,9 +101,11 @@ void setup()
     Init_GPS();
     break;
 #endif
+#ifdef FEATURE_ENABLE_TIMER
   case SOURCE_TIME:
 
     break;
+#endif
 #ifdef FEATURE_ENABLE_CAN
   case SOURCE_CAN:
     Init_CAN();
@@ -175,8 +177,10 @@ void loop()
     wheelDistance = Process_CAN_WheelSpeed();
     break;
 #endif
+#ifdef FEATURE_ENABLE_TIMER
   case SOURCE_TIME:
     break;
+#endif
 #ifdef FEATURE_ENABLE_GPS
   case SOURCE_GPS:
     wheelDistance = Process_GPS_WheelSpeed();
@@ -585,4 +589,3 @@ uint32_t Process_Impulse_WheelSpeed()
 
   return add_milimeters;
 }
-