Problema al pasar texto o numero de esp8266 a nextion 2.4

/**
 * @example CompText.ino
 *
 * @par How to Use
 * This example shows that ,when the "+" component on the Nextion screen is released,
 * the value of text component will plus 1,when the "-" component released ,the value of 
 * text component will minus 1 every time.
 *
 * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
 * @date    2015/7/10
 * @updated 2016/12/25 bring HMI up to v0.32 to avoid too old issues
 * @convert by Patrick Martin, no other changes made
 * @copyright 
 * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 */

#include "Nextion.h"
#include <SoftwareSerial.h>
void t0PopCallback(void *ptr);
void b0PopCallback(void *ptr);
void b1PopCallback(void *ptr);
SoftwareSerial nextion(6, 7); // RX, TX
Nextion myNextion(nextion,9600);
/*
 * Declare a text object [page id:0,component id:1, component name: "t0"]. 
 */
NexText t0 = NexText(0, 1, "t0");

/*
 * Declare a button object [page id:0,component id:2, component name: "b0"]. 
 */
NexButton b0 = NexButton(0, 2, "b0");

/*
 * Declare a button object [page id:0,component id:3, component name: "b1"]. 
 */
NexButton b1 = NexButton(0, 3, "b1");

char buffer[100] = {0};

/*
 * Register object t0, b0, b1, to the touch event list.  
 */
NexTouch *nex_listen_list[] = 
{
    &t0,
    &b0,
    &b1,
    NULL
};

/*
 * Text component pop callback function. 
 */
void t0PopCallback(void *ptr)
{
    SerialPrintln("t0PopCallback");
    t0.setText("50");
}

/*
 * Button0 component pop callback function.
 * In this example,the value of the text component will plus one every time when button0 is released.
 */
void b0PopCallback(void *ptr)
{
    uint16_t len;
    uint16_t number;
    
    SerialPrintln("b0PopCallback");

    memset(buffer, 0, sizeof(buffer));
    t0.getText(buffer, sizeof(buffer));
    
    number = atoi(buffer);
    number += 1;

    memset(buffer, 0, sizeof(buffer));
    itoa(number, buffer, 10);
    
    t0.setText(buffer);
}

/*
 * Button1 component pop callback function.
 * In this example,the value of the text component will minus one every time when button1 is released.
 */
void b1PopCallback(void *ptr)
{
    uint16_t len;
    uint16_t number;
    
   SerialPrintln("b1PopCallback");

    memset(buffer, 0, sizeof(buffer));
    t0.getText(buffer, sizeof(buffer));
    
    number = atoi(buffer);
    number -= 1;

    memset(buffer, 0, sizeof(buffer));
    itoa(number, buffer, 10);
    
    t0.setText(buffer);
}

void setup(void)
{
    /* Set the baudrate which is for debug and communicate with Nextion screen. */
    Serial.begin(9600);
    myNextion.init();

    /* Register the pop event callback function of the current text component. */
    t0.attachPop(t0PopCallback);

    /* Register the pop event callback function of the current button0 component. */
    b0.attachPop(b0PopCallback);

    /* Register the pop event callback function of the current button1 component. */
    b1.attachPop(b1PopCallback);

    SerialPrintln("setup done");
}

void loop(void)
{
    /*
     * When a pop or push event occured every time, 
     * the corresponding component[right page id and component id] in touch event list will be asked.
     */
    nexLoop(nex_listen_list);
}

/**
 * @file NexConfig.h
 *
 * Options for user can be found here. 
 *
 * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
 * @date    2015/8/13
 * @copyright 
 * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 */
#ifndef __NEXCONFIG_H__
#define __NEXCONFIG_H__

/**
 * @addtogroup Configuration 
 * @{ 
 */

/** 
 * Define DEBUG_SERIAL_ENABLE to enable debug serial. 
 * Comment it to disable debug serial. 
 */
//#define DEBUG_SERIAL_ENABLE

/**
 * Define dbSerial for the output of debug messages. 
 */
#define dbSerial Serial

/**
 * Define nexSerial for communicate with Nextion touch panel. 
 */
#define nexSerial Serial2


#ifdef DEBUG_SERIAL_ENABLE
#define dbSerialPrint(a)    dbSerial.print(a)
#define dbSerialPrintln(a)  dbSerial.println(a)
#define dbSerialBegin(a)    dbSerial.begin(a)
#else
#define dbSerialPrint(a)    do{}while(0)
#define dbSerialPrintln(a)  do{}while(0)
#define dbSerialBegin(a)    do{}while(0)
#endif

/**
 * @}
 */

#endif /* #ifndef __NEXCONFIG_H__ */

C:\Users\Jose\AppData\Local\Temp\arduino_modified_sketch_768025\CompText_v0_32.ino: In function 'void setup()':

CompText_v0_32:115:5: error: 'myNextion' was not declared in this scope

     myNextion.init();

     ^

CompText_v0_32:126:31: error: 'SerialPrintln' was not declared in this scope

     SerialPrintln("setup done");

exit status 1
'Nextion' does not name a type

[1073670612:0,2,b0]
22:22:02.896 -> b0PopCallback
22:22:02.896 -> recvRetString[2,50]
22:22:02.998 -> recvRetCommandFinished err

/**
 * @example CompText.ino
 *
 * @par How to Use
 * This example shows that ,when the "+" component on the Nextion screen is released,
 * the value of text component will plus 1,when the "-" component released ,the value of 
 * text component will minus 1 every time.
 *
 * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
 * @date    2015/7/10
 * @updated 2016/12/25 bring HMI up to v0.32 to avoid too old issues
 * @convert by Patrick Martin, no other changes made
 * @copyright 
 * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 */

#include "Nextion.h"
void t0PopCallback(void *ptr);
void b0PopCallback(void *ptr);
void b1PopCallback(void *ptr);

#define TX 12
#define RX 13
SoftwareSerial NextionSerial(RX,TX); // RX, TX
/*
 * Declare a text object [page id:0,component id:1, component name: "t0"]. 
 */
NexText t0 = NexText(0, 1, "t0");

/*
 * Declare a button object [page id:0,component id:2, component name: "b0"]. 
 */
NexButton b0 = NexButton(0, 2, "b0");

/*
 * Declare a button object [page id:0,component id:3, component name: "b1"]. 
 */
NexButton b1 = NexButton(0, 3, "b1");

char buffer[100] = {0};

/*
 * Register object t0, b0, b1, to the touch event list.  
 */
NexTouch *nex_listen_list[] = 
{
    &t0,
    &b0,
    &b1,
    NULL
};

/*
 * Text component pop callback function. 
 */
void t0PopCallback(void *ptr)
{
    dbSerialPrintln("t0PopCallback");
    t0.setText("50");
}

/*
 * Button0 component pop callback function.
 * In this example,the value of the text component will plus one every time when button0 is released.
 */
void b0PopCallback(void *ptr)
{
    uint16_t len;
    uint16_t number;
    
    dbSerialPrintln("b0PopCallback");

    memset(buffer, 0, sizeof(buffer));
    t0.getText(buffer, sizeof(buffer));
    
    number = atoi(buffer);
    number += 1;

    memset(buffer, 0, sizeof(buffer));
    itoa(number, buffer, 10);
    
    t0.setText(buffer);
}

/*
 * Button1 component pop callback function.
 * In this example,the value of the text component will minus one every time when button1 is released.
 */
void b1PopCallback(void *ptr)
{
    uint16_t len;
    uint16_t number;
    
   dbSerialPrintln("b1PopCallback");

    memset(buffer, 0, sizeof(buffer));
    t0.getText(buffer, sizeof(buffer));
    
    number = atoi(buffer);
    number -= 1;

    memset(buffer, 0, sizeof(buffer));
    itoa(number, buffer, 10);
    
    t0.setText(buffer);
}

void setup(void)
{
    /* Set the baudrate which is for debug and communicate with Nextion screen. */
   
    nexInit();

    /* Register the pop event callback function of the current text component. */
    t0.attachPop(t0PopCallback);

    /* Register the pop event callback function of the current button0 component. */
    b0.attachPop(b0PopCallback);

    /* Register the pop event callback function of the current button1 component. */
    b1.attachPop(b1PopCallback);

    dbSerialPrintln("setup done");
}

void loop(void)
{
    /*
     * When a pop or push event occured every time, 
     * the corresponding component[right page id and component id] in touch event list will be asked.
     */
    nexLoop(nex_listen_list);
}

/**
 * @file NexConfig.h
 *
 * Options for user can be found here. 
 *
 * @author  Wu Pengfei (email:<pengfei.wu@itead.cc>)
 * @date    2015/8/13
 * @copyright 
 * Copyright (C) 2014-2015 ITEAD Intelligent Systems Co., Ltd. \n
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 */
#ifndef __NEXCONFIG_H__
#define __NEXCONFIG_H__

/**
 * @addtogroup Configuration 
 * @{ 
 */

/** 
 * Define DEBUG_SERIAL_ENABLE to enable debug serial. 
 * Comment it to disable debug serial. 
 */
#define DEBUG_SERIAL_ENABLE

/**
 * Define dbSerial for the output of debug messages. 
 */
#define dbSerial Serial

/**
 * Define nexSerial for communicate with Nextion touch panel. 
 */
#include <SoftwareSerial.h>
extern SoftwareSerial NextionSerial;
#define nexSerial NextionSerial


#ifdef DEBUG_SERIAL_ENABLE
#define dbSerialPrint(a)    dbSerial.print(a)
#define dbSerialPrintln(a)  dbSerial.println(a)
#define dbSerialBegin(a)    dbSerial.begin(a)
#else
#define dbSerialPrint(a)    do{}while(0)
#define dbSerialPrintln(a)  do{}while(0)
#define dbSerialBegin(a)    do{}while(0)
#endif

/**
 * @}
 */

#endif /* #ifndef __NEXCONFIG_H__ */