TFT touch und Sensor communication

Hey guys,
i have 2 Arduinos Mega (1 for the TFT touch screen and the second for Sensors).
The Code is too long thats why i used points.
without the funktion Werte() the TFT worked well.
The funktion Werte() worked also good but when i use it i couldnt use the touch again i mean the touch function doesnt work when i put Werte() funktion.
do you have any solutions guys?
thjis is the Code :

#include <UTFT.h> 
#include <UTouch.h>


//==== Creating Objects
UTFT    myGLCD(EHOUSE70,38,39,40,41); 
UTouch  myTouch( 6, 5, 4, 3, 2);
extern uint8_t SmallFont[];
extern uint8_t BigFont[];
extern uint8_t SevenSegNumFont[];

float sensor1 = 0;
char inChar;
int bg[] = {
  0, 0, 255};
#define Relai 8  
int fg[] = {
  255, 255, 255};
int button1on = 0;
char currentPage, selectedUnit;
int waterhour     = 16;//
int waterminute0   = 0; 
int waterminute1   = 30;//
int waterminute2   = 46;
int watersecond   = 0;  
int waterONminute = 1;
void setup() {
// Initial setup
  myGLCD.InitLCD();
  myGLCD.clrScr();
  myTouch.InitTouch();
  myTouch.setPrecision(PREC_MEDIUM);
    drawHomeScreen();  // Draws the Home Screen
    
  currentPage = '0'; // Indicates that we are at Home Screen
  selectedUnit = '0'; // Indicates the selected unit for the first example, cms or inches
 
  pinMode(Relai, OUTPUT);
  Serial.begin(9600);
Serial1.begin(9600);  
digitalWrite(Relai, HIGH);

}
void loop() { 

// Home Screen
  if (currentPage == '0') {
  Werte();
  
    if (myTouch.dataAvailable()) {
      
      myTouch.read();
      x=myTouch.getX(); 
      y=myTouch.getY(); 
      if ((x>=110) && (x<=410) && (y>=350) && (y<=450)) {
        drawFrame(110, 350,410, 450); 
        currentPage = '1'; 
        myGLCD.clrScr(); 
        Systemeinstellung(); 
      }}}
  if (currentPage == '1') {
      if (myTouch.dataAvailable()) {
        myTouch.read();
        x=myTouch.getX();
        y=myTouch.getY();// 
        if ((x>=10) && (x<=60) &&(y>=10) && (y<=36)) {
          drawFrame(10, 10, 60, 36);
          currentPage = '0'; // Indicates we are at home screen
          myGLCD.clrScr();
          drawHomeScreen(); // Draws the home screen
        }
        
      if ((x>=200) && (x<=600) &&(y>=130) && (y<=180)) {
          drawFrame(200, 130,600, 180);  
        currentPage = '3';
        myGLCD.clrScr();
        drawWasserpumpe();}
        }}}
void drawHomeScreen()
 {
  
   // Title
   myGLCD.setBackColor(0,0,0); // Sets the background color of the area where the text will be printed to black
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.setFont(BigFont); // Sets font to big
   myGLCD.print("Willkomen ", CENTER, 10); // Prints the string on the screen
   myGLCD.setFont(SmallFont); // Sets the font to small
   myGLCD.setColor(255, 0, 0); // Sets color to red
   myGLCD.drawLine(0,32,319,32); // Draws the red line
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.setFont(SmallFont); // Sets the font to small
 
   myGLCD.setFont(BigFont);
   myGLCD.print("Der Multifilter ist ", LEFT, 64);
    myGLCD.print("Temperatur ", CENTER, 90);
    myGLCD.setFont(SmallFont);
    myGLCD.print("TEMP1(TANK)      TEMP2(REAKTOR1)      TEMP3(DRAUSSEN)      Temp4(MULTIFILTER)      TEMP5(REAKTOR2)", 10, 120);
    myGLCD.setFont(BigFont);
    
    
    myGLCD.printNumI(x4,540, 150);
    myGLCD.printNumI(x5,720, 150);
    myGLCD.print("FEINSTAUB ", CENTER, 190);
    myGLCD.setFont(SmallFont);
    myGLCD.print("PM1.0 ", 25, 220);
    myGLCD.print("PM2.5 ", 360, 220);
    myGLCD.print("PM10 ", 695, 220);
    myGLCD.setFont(BigFont);
 
    myGLCD.printNumI(x1,35, 240);
    myGLCD.printNumI(x2,370, 240);
    myGLCD.printNumI(x3,705, 240);
    myGLCD.print("NOX ", 350, 270);
    myGLCD.setFont(SmallFont);
     myGLCD.print("Konzentration0 ", 150, 290);
     myGLCD.print("Konzentration1 ", 500, 290);
     myGLCD.setFont(BigFont);
     myGLCD.printNumI(x1,200, 310);
     myGLCD.printNumI(x2,550, 310);
   

   

   // Button - System einstellen
   
   myGLCD.setColor(16, 167, 103); // Sets green color
   myGLCD.fillRoundRect (110, 350,410, 450); // Draws filled rounded rectangle
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.drawRoundRect (110, 350,410, 450); // 
   myGLCD.setFont(BigFont); // Sets the font to big
   myGLCD.setBackColor(16, 167, 103); // 
   myGLCD.print("System einstellen", 130, 390);  // Prints the string

   // Button - Sensoren Messwerte
  myGLCD.setColor(16, 167, 103);
  myGLCD.fillRoundRect (430, 350, 730, 450);
  myGLCD.setColor(255, 255, 255);
  myGLCD.drawRoundRect (430, 350, 730, 450);
  myGLCD.setFont(BigFont);
  myGLCD.setBackColor(16, 167, 103);
  myGLCD.print("Sensoren Werte", 460, 390);
  drawButtons();
 
  }
void drawFrame(int x1, int y1, int x2, int y2) {
  myGLCD.setColor(255, 0, 0);
  myGLCD.drawRoundRect (x1, y1, x2, y2);
  while (myTouch.dataAvailable())
    myTouch.read();
    myGLCD.setColor(255, 255, 255);
    myGLCD.drawRoundRect (x1, y1, x2, y2);
}

 void Systemeinstellung() {
  
  myGLCD.setColor(100, 155, 203);
  myGLCD.fillRoundRect (10, 10, 60, 36);
  myGLCD.setColor(255, 255, 255);
  myGLCD.drawRoundRect (10, 10, 60, 36);
  myGLCD.setFont(BigFont);
  myGLCD.setBackColor(100, 155, 203);
  myGLCD.print("<-", 18, 15);
  myGLCD.setBackColor(0, 0, 0);
  myGLCD.setFont(SmallFont);
  myGLCD.print("zurueck", 70, 18);
  myGLCD.setFont(BigFont);
  myGLCD.print("Einstellung", CENTER, 50);
// Button - Wasserpumpe
  myGLCD.setColor(16, 167, 103); // Sets green color
   myGLCD.fillRoundRect (200, 130,600, 180); // Draws filled rounded rectangle
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.drawRoundRect (200, 130,600, 180); // Draws rounded rectangle without a fill, so the overall appearance of the button looks like it has a frame
   myGLCD.setFont(BigFont); // Sets the font to big
   myGLCD.setBackColor(16, 167, 103); // Sets the background color of the area where the text will be printed to green, same as the button
   myGLCD.print("Wasserpumpe", CENTER, 150); // Prints the string
// Button - Luftpumpe
   myGLCD.setColor(16, 167, 103); // Sets green color
   myGLCD.fillRoundRect (200, 200,600, 250); // Draws filled rounded rectangle
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.drawRoundRect (200, 200,600, 250); // Draws rounded rectangle without a fill, so the overall appearance of the button looks like it has a frame
   myGLCD.setFont(BigFont); // Sets the font to big
   myGLCD.setBackColor(16, 167, 103); // Sets the background color of the area where the text will be printed to green, same as the button
   myGLCD.print("Luftpumpe", CENTER, 220); // Prints the string
// Button - Licht 
   myGLCD.setColor(16, 167, 103); // Sets green color
   myGLCD.fillRoundRect (200, 270,600, 320); // Draws filled rounded rectangle
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.drawRoundRect (200, 270,600, 320); // Draws rounded rectangle without a fill, so the overall appearance of the button looks like it has a frame
   myGLCD.setFont(BigFont); // Sets the font to big
   myGLCD.setBackColor(16, 167, 103); // Sets the background color of the area where the text will be printed to green, same as the button
   myGLCD.print("Licht", CENTER, 290); // Prints the string
// Button - Durchlauferhitzer  
   myGLCD.setColor(16, 167, 103); // Sets green color
   myGLCD.fillRoundRect (200, 340,600, 390); // Draws filled rounded rectangle
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.drawRoundRect (200, 340,600, 390); // Draws rounded rectangle without a fill, so the overall appearance of the button looks like it has a frame
   myGLCD.setFont(BigFont); // Sets the font to big
   myGLCD.setBackColor(16, 167, 103); // Sets the background color of the area where the text will be printed to green, same as the button
   myGLCD.print("Durchlauferhitzer", CENTER, 360); // Prints the string
// Button - Kühlgeräte
   myGLCD.setColor(16, 167, 103); // Sets green color
   myGLCD.fillRoundRect (200, 410,600, 460); // Draws filled rounded rectangle
   myGLCD.setColor(255, 255, 255); // Sets color to white
   myGLCD.drawRoundRect (200, 410,600, 460); // Draws rounded rectangle without a fill, so the overall appearance of the button looks like it has a frame
   myGLCD.setFont(BigFont); // Sets the font to big
   myGLCD.setBackColor(16, 167, 103); // Sets the background color of the area where the text will be printed to green, same as the button
   myGLCD.print("Kuehlgeraet", CENTER, 430); // Prints the string   

void Werte(){ 
  if (Serial1.available()){
  
    // wait until the serial reading encounters character 'a'
    // this marks the beginning of data
    inChar = Serial1.read();
    while (inChar != 'a')
    {
      inChar = Serial1.read();
    }
    // when character 'a' is encountered, read the floating data till the next character
    sensor1 = Serial1.parseFloat();
    inChar = Serial1.read();
    // run if the next character is 'b' (it will always be 'b', unless someone messes with the sender code)
    if (inChar == 'b')
    {
      // read floating value till next character
      sensor2 = Serial1.parseFloat();
    }
    inChar = Serial1.read();
    // break out of the loop once character 'c' is encountered
    if (inChar == 'c')
    {
      return;
    }
    // for more sensor values, add more IF cases and keep the 'break' in the last one
    // number them alphabetically for simplicity
  }
  Serial.println(sensor1);
    Serial.println(sensor2);
   
    myGLCD.printNumF(sensor1,2,190, 150);
    myGLCD.printNumF(sensor2,2,360, 150);
        
}