diff --git a/WaterishOS-core3.0/WaterishOS-core3.0.ino b/WaterishOS-core3.0/WaterishOS-core3.0.ino
index f22a0a5..f0f7694 100644
--- a/WaterishOS-core3.0/WaterishOS-core3.0.ino
+++ b/WaterishOS-core3.0/WaterishOS-core3.0.ino
@@ -26,9 +26,11 @@
 #include <Adafruit_MCP23017.h>
 #include <Thread.h>
 #include <ThreadController.h>
+#include <AceButton.h>
 Adafruit_MCP23017 mcp;
 long tslr = 0;
 WiFiClient espClient;
+AceButton gpio0(0);
 PubSubClient client("siwatsystem.com", 1883, espClient);
 PubSubClientTools mqtt(client);
 ThreadController threadControl = ThreadController();
@@ -41,19 +43,23 @@ boolean lastsensorstate[12];
 boolean firstrun = true;
 FlowMeter sensor1 = FlowMeter(12);
 FlowMeter sensor2 = FlowMeter(13);
+boolean devcon=false;
 volatile boolean awakenByInterrupt = false;
 LiquidCrystal_I2C lcd(0x3F, 16, 2);
 int menu;
+void handleGPIO0(AceButton*, uint8_t, uint8_t);
 void writelcd(String line1, String line2){
+  if(!devcon){
   lcd.clear();
   lcd.print(line1);
   lcd.setCursor(0,1);
   lcd.print(line2);
   Serial.print("Writing to LCD: "+line1+"    "+line2+"\n");
+  }
 }
 void updatelcd()
 {
-  writelcd("1: "+String((int)sensor1.getCurrentFlowrate())+"L/h "+String(sensor1.getTotalVolume())+"L","2:"+String((int)sensor2.getCurrentFlowrate())+"L/h "+String(sensor2.getTotalVolume())+"L");
+  if(!devcon)writelcd("1: "+String((int)sensor1.getCurrentFlowrate())+"L/h "+String(sensor1.getTotalVolume())+"L","2:"+String((int)sensor2.getCurrentFlowrate())+"L/h "+String(sensor2.getTotalVolume())+"L");
 }
 void ICACHE_RAM_ATTR read1() {
   sensor1.count();
@@ -113,6 +119,8 @@ void setup() {
   pinMode(14, INPUT_PULLUP);
   pinMode(12, INPUT);
   pinMode(13, INPUT);
+  pinMode(0, INPUT_PULLUP);
+  gpio0.setEventHandler(handleGPIO0);
   attachInterrupt(digitalPinToInterrupt(12), read1, RISING);
   attachInterrupt(digitalPinToInterrupt(13), read2, RISING);
   delay(1000);
@@ -158,4 +166,28 @@ void setup() {
 void loop() {
   if(online)client.loop();
   threadControl.run();
+  gpio0.check();
+}
+void handleGPIO0(AceButton* , uint8_t eventType,
+    uint8_t ) {
+  switch (eventType) {
+    case AceButton::kEventPressed:
+      devcon=true; //no going back, Delete Waterish OS and Install Siwat INC(R) DEVCON OS
+      lcd.print("  SIWAT INC(R)  ","DEVCON OS V3.2.4");
+      delay(1000);
+      lcd.print("DEVCON  TOOLKITS","3 Extension Load");
+      delay(1000);
+      lcd.print("Initia Extension","connectionchck.c");
+      delay(2000);
+      lcd.print("Initia Extension","hall_pid_tuner.c")
+      delay(2000);
+      lcd.print("Initia Extension","credit_display.c");
+      delay(2000);
+      lcd.print("DEVCON  TOOLKITS","set WTOS at 0x3D");
+      delay(1000);
+      break;
+    case AceButton::kEventReleased:
+      //debounce
+      break;
+  }
 }