diff --git a/Makefile b/Makefile
index d2011e9..8493333 100644
--- a/Makefile
+++ b/Makefile
@@ -1,25 +1,53 @@
+WIZCHIP=W5500
+ENABLE_DHCP=yes
+ENABLE_DNS=yes
+ENABLE_HTTPSERVER=yes
+ENABLE_MQTT=yes
+ENABLE_SNTP=yes
+
+# =====================================================================
+
 CC=arm-none-eabi-gcc
 AR=arm-none-eabi-ar
 
-CFLAGS=-iquote Ethernet -iquote Application -iquote Internet -Wall
+CFLAGS=-iquote Ethernet -Wall -D_WIZCHIP_=$(WIZCHIP)
 
 OBJDIR=build
 VPATH=Ethernet:Ethernet/W5500
-VPATH+=Internet/DHCP
-VPATH+=Internet/DNS
-VPATH+=Internet/MQTT:Internet/MQTT/MQTTPacket/src
-VPATH+=Internet/httpServer
-VPATH+=Internet/SNTP
+ifeq ($(ENABLE_DHCP),yes)
+  VPATH+=Internet/DHCP
+endif
+ifeq ($(ENABLE_DNS),yes)
+  VPATH+=Internet/DNS
+endif
+ifeq ($(ENABLE_MQTT),yes)
+  VPATH+=Internet/MQTT:Internet/MQTT/MQTTPacket/src
+endif
+ifeq ($(ENABLE_HTTPSERVER),yes)
+  VPATH+=Internet/httpServer
+endif
+ifeq ($(ENABLE_SNTP),yes)
+  VPATH+=Internet/SNTP
+endif
 
-OBJS=$(addprefix $(OBJDIR)/,wizchip_conf.o socket.o w5500.o \
-  dhcp.o \
-  dns.o \
-  httpParser.o httpServer.o httpUtil.o \
-  sntp.o \
-  MQTTConnectClient.o MQTTConnectServer.o MQTTDeserializePublish.o MQTTFormat.o MQTTPacket.o MQTTSerializePublish.o MQTTSubscribeClient.o MQTTSubscribeServer.o \
-  MQTTUnsubscribeClient.o MQTTUnsubscribeServer.o \
-  mqtt_interface.o MQTTClient.o \
-)
+OBJS=$(addprefix $(OBJDIR)/,wizchip_conf.o socket.o w5500.o)
+ifeq ($(ENABLE_DHCP),yes)
+  OBJS+=$(addprefix $(OBJDIR)/,dhcp.o)
+endif
+ifeq ($(ENABLE_DNS),yes)
+  OBJS+=$(addprefix $(OBJDIR)/,dns.o)
+endif
+ifeq ($(ENABLE_HTTPSERVER),yes)
+  OBJS+=$(addprefix $(OBJDIR)/,httpParser.o httpServer.o httpUtil.o)
+endif
+ifeq ($(ENABLE_SNTP),yes)
+  OBJS+=$(addprefix $(OBJDIR)/,sntp.o)
+endif
+ifeq ($(ENABLE_MQTT),yes)
+  OBJS+=$(addprefix $(OBJDIR)/,MQTTConnectClient.o MQTTConnectServer.o MQTTDeserializePublish.o \
+    MQTTFormat.o MQTTPacket.o MQTTSerializePublish.o MQTTSubscribeClient.o MQTTSubscribeServer.o \
+    MQTTUnsubscribeClient.o MQTTUnsubscribeServer.o mqtt_interface.o MQTTClient.o)
+endif