Data from Serial monitor to TFT display

Hello, I am new one in Arduino, i had my TFT display (TFT_320QVT) connected to arduino mega. And I just want to see everything from serial monitor on display. For example information about ip address, gateway, subnet.

But i still got a error message. Please help me. Thank you for every comment.

error message

DhcpChatServer1.ino: In function ‘void setup()’:
DhcpChatServer1.ino:85:28: error: invalid conversion from ‘int’ to ‘char*’ [-fpermissive]
In file included from DhcpChatServer1.ino:4:0:
/usr/share/arduino/libraries/UTFT/UTFT.h:215:8: error:   initializing argument 1 of ‘void UTFT::print(char*, int, int, int)’ [-fpermissive]
   void print(char *st, int x, int y, int deg=0);

my code

#include <TFT.h>

#include <memorysaver.h>
#include <UTFT.h>

/*
 DHCP Chat  Server
 
 A simple server that distributes any incoming messages to all
 connected clients.  To use telnet to  your device's IP address and type.
 You can see the client's input in the serial monitor as well.
 Using an Arduino Wiznet Ethernet shield. 
 
 THis version attempts to get an IP address using DHCP
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 
 created 21 May 2011
 modified 9 Apr 2012
 by Tom Igoe
 Based on ChatServer example by David A. Mellis
 
 */

#include <SPI.h>
#include <Ethernet.h>
#define c

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network.
// gateway and subnet are optional:
byte mac[] = { 
  0x00, 0xAA, 0xBB, 0xCC, 0xDE, 0x02 };
IPAddress ip(192,168,1, 177);
IPAddress gateway(192,168,1, 1);
IPAddress subnet(255, 255, 0, 0);

// telnet defaults to port 23
EthernetServer server(23);
boolean gotAMessage = false; // whether or not you got a message from the client yet
UTFT myGLCD(ITDB32S,38,39,40,41); 
 extern uint8_t BigFont[];

void setup() {
  
  // set LCD
  myGLCD.InitLCD();
 
  myGLCD.setFont(BigFont);

  myGLCD.clrScr();
 
 
  myGLCD.setBackColor(255, 255, 255);

  myGLCD.fillRect(0,0,319,239);
 
  myGLCD.setColor(120, 120, 255);

  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  // this check is only needed on the Leonardo:
   while (!Serial) {
    ; // wait for serial port to connect. Needed for Leonardo only
  }


  // start the Ethernet connection:
  Serial.println("Trying to get an IP address using DHCP");
  if (Ethernet.begin(mac) == 0) {
    Serial.println("Failed to configure Ethernet using DHCP");
    // initialize the ethernet device not using DHCP:
    Ethernet.begin(mac, ip, gateway, subnet);
  }
  // print your local IP address:
  Serial.print("My IP address: ");
  ip = Ethernet.localIP();
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(ip[thisByte], DEC);
    Serial.print("."); 
  }
  Serial.println();
  myGLCD.print(Serial.read(), CENTER, 55);
  
  // start listening for clients
  server.begin();
 
}

void loop() {
  // wait for a new client:
  EthernetClient client = server.available();

  // when the client sends the first byte, say hello:
  if (client) {
    if (!gotAMessage) {
      Serial.println("We have a new client");
      client.println("Hello, client!"); 
      gotAMessage = true;
    }

    // read the bytes incoming from the client:
    char thisChar = client.read();
    // echo the bytes back to the client:
    server.write(thisChar);
    // echo the bytes to the server as well:
    Serial.print(thisChar);
    
  }
}

But i still got a error message

and that message is ...........

Sorry, here it is

DhcpChatServer1.ino: In function ‘void setup()’:
DhcpChatServer1.ino:85:28: error: invalid conversion from ‘int’ to ‘char*’ [-fpermissive]
In file included from DhcpChatServer1.ino:4:0:
/usr/share/arduino/libraries/UTFT/UTFT.h:215:8: error:   initializing argument 1 of ‘void UTFT::print(char*, int, int, int)’ [-fpermissive]
   void print(char *st, int x, int y, int deg=0);
        ^

Error message says clear what happen : Serial.read() return a int, the UTFT::print() function expect a pointer to char (a string, in C lang) , so you have to convert your value :

char *c[4] = "   ";
itoa(Serial.read(),c,10);
myGLCD.print(c, CENTER, 55);

Not tested, but should work.

Cheers, Ale.

ok i have some result but i dont know where in code should i put this myGLCD.print part to show ip address and other net info on my lcd

now i have it here, but on LCD is just “-1”

  }
  // print your local IP address:
  Serial.print("My IP address: ");
  ip = Ethernet.localIP();
   char *c = " ";
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(ip[thisByte], DEC);
    Serial.print("."); 
  }
     
 itoa(Serial.read(),c,10);
     myGLCD.print(c, CENTER, 35);
  
  Serial.println();
     

  // start listening for clients
  server.begin();
 
}

Sorry, but your code seems inconsistent for what you want to get. Do you want to have the same things that you print over serial on lcd too? In this case why you print on lcd a Serial.read()??
For showing IP on lcd you can try this :

  Serial.print("My IP address: ");
  ip = Ethernet.localIP();
  for (byte thisByte = 0; thisByte < 4; thisByte++) {
    // print the value of each byte of the IP address:
    Serial.print(ip[thisByte], DEC);
    Serial.print(".");
  }
  char *ip_addr[25];
  memset(ip_addr,0,25);
  sprintf(ip_addr,"IP: %d.%d.%d.%d",ip[0],ip[1],ip[2],ip[3]);
  myGLCD.print(ip_addr, CENTER, 35);

Not tested, and other problems can arise, ex. how many chars per line on your display?

Anyway, if you give more details on your setup and what are trying to getting out from it you’ll have a better help.

Cheers, Ale.