hello
you have in your librarie this
uint8_t Nextion::pageId(void){

can you send an example for use ?

thanks a lot

hello
it's possible to send a value of componentText on other page ?
this code work on the page where temp1 is but not on other page
myNextion.setComponentText("temp1", String(temp1));
it's possible to send like this
myNextion.setComponentText("page1.temp1", String(temp1));
thanks a lot

I am using an Arduino Mega and use Serial1 for Nextion.
Nextion.listen() works fine but getComponentValue or paged() return no values or wrong values.
With SoftwareSerial all works fine but i can't use software serial in one special project.

Any ideas?

Hi. Having fun with this library. It works great with my Arduino Nano and Uno and the 2.4" Nextion. However when I'm just using the Arduino and the debug mode in the Nextion IDE without the TFT attached. The function getcomponentValue does not return a number. I did however discover that changing the timeout setting from 20 to 200 in the Nextion.cpp file worked.
Is this going to cause any unforeseen problems somewhere else?

Only thing weird I may be doing is continuing to use software serial and changing my RX TX settings to 0 and 1.

we can not use this library in Esp8266 wemos d1 r2. How can we reconfig this library for wemos.
no matching function for call to 'Nextion::Nextion(HardwareSerial&, int) in arduino is giving bad function.

http://esp8266.github.io/Arduino/versions/2.0.0/doc/reference.html#serial

thanks

Hi, I'm a complete Nextion Noob trying this tutorial for the first time. I figured my recent Nextion probably was incompatible with the old tft files so I imported the HMI file for my rez into the Nextion Editor: 272x480Example.HMI

What I got was unexpected. The basic image seems to be reversed L/R and there is only 1 page. I expected 3 pages and the image to be right way around. Here's a link to screen snapshot

[img]https://i.imgur.com/5zYxpQ2l.png[/img]

So ummm... is this tute now so out of date that there is no hope for it & I must start from scratch, or is there some simple hack I can do to make the HMI file work...?

I get the following error when trying to use the library.
Nextion.cpp: In member function 'boolean Nextion::ack()':
Nextion.cpp:119:1: error: control reaches end of non-void function [-Werror=return-type]
119 | }//end
| ^
This only happens when using the latest ESP8266 software

I encountered a very strange problem
when using your demo-code the compilation was only successful with having the
ITEADLIB_Arduino_Nextion-master-libary
AND
the https://github.com/bborncr/nextion/tree/master
beeing installed.

Only in case the https://github.com/bborncr/nextion/tree/master is installed

The compiler uses the
VERY STRANGE
ITEADLIB_Arduino_Nextion-master-libary

hello

it's possible to set the "en" variable of a timer like this
myNextion.setComponentTimer ("tm1", 0);

thanks a lot

Hi, can I send, only with this display, some digital commands trough rxd txd ?
For example if I make a button ON, when i press him, this send via rs232
$18 $00 and for OFF button $18 $01
thank you in advance !

how to use in mega arduino? is not working the buttons: /, no one works perfectly, now the mega no longer works the buttons

Something is puzzling me about the output from this demo sketch. I have got some push buttons working on my Nextion, and am reading the serial port with a Uno successfully. I see this kind of output in my Monitor:

65 0 8 0 ffff ffff ffff
65 0 8 1 0 0 0 ffff ffff ffff
65 0 8 0 ffff ffff ffff
65 0 8 0 0 0 0 ffff ffff ffff

So far so good -- an on/off button id 8 on page 0 is pressed and released, and on the release event I send its id and also (in user code) package up a data message to send its state (selected); I press it again, and on release I get the release message again and my Nextion user code sends a further message with its state (deselected) and it's all fine. Except for those trailing EOM bytes!

The ITEAD doco says that the EOM marker is three bytes: 0xFF 0xFF 0xFF.

Yet the monitor is showing 6 bytes: FFFF FFFF FFFF.

I did take a look at the "listen" function and I don't see where those FFs are getting duplicated, yet when I print out my messages from the Nextion (user code) ending in FF FF FF, what I see in the log is FFFF FFFF FFFF. It's quite puzzling. I must be missing something obvious...!

Hi,
In the Nextion.cpp lines 184-201 are commented with /*
In this instance the command myNextion.getComponentText() doesn't work.
When descomment these lines everything work perfect on the Mega2560.

Tried various options but get:

Compiling .pioenvs\nucleo_l432kc\lib\nextionsimple\Nextion.o
lib\nextionsimple\Nextion.cpp: In member function 'uint8_t Nextion::pageId()':

lib\nextionsimple\Nextion.cpp:302:7: warning: unused variable 'a' [-Wunused-variable]
int a = -1;
^
lib\nextionsimple\Nextion.cpp: In member function 'void Nextion::flushSerial()':
lib\nextionsimple\Nextion.cpp:334:10: error: request for member 'flush' in '((Nextion*)this)->N
extion::Serial', which is of pointer type 'HardwareSerial*' (maybe you meant to use '->' ?)
Serial.flush();
^
lib\nextionsimple\Nextion.cpp: In member function 'boolean Nextion::ack()':
lib\nextionsimple\Nextion.cpp:119:1: warning: control reaches end of non-void function [-Wretur
n-type]
}//end
^
*** [.pioenvs\nucleo_l432kc\lib\nextionsimple\Nextion.o] Error 1
[ERROR] Took 2.42 seconds

Please help me figure it out. The display has n0=0 and t0=text.
I use
`#include <SoftwareSerial.h>
#include <Nextion.h>
SoftwareSerial nextion(17, 16);
Nextion myNextion(nextion, 9600);

int recc;
String id, mess;

void setup()
{
Serial.begin(9600);
myNextion.init();

}
void loop() {

mess = myNextion.getComponentText("t0");
Serial.print("mess: ");
Serial.println(mess);

delay(1000);

recc = myNextion.getComponentValue("n0");
Serial.print("recc: ");
Serial.println(recc);

delay(1000);
}`

And I get
mess: 1a
recc: -1
Tell me what I'm doing wrong. I want to get at least a text. Thank you!

Hello, i'm using Nextion and a Arduino Mega 2560, and my problem is i can't send to nextion with arduino but arduino don't receive from nextion, ReceiveMessages example don't work, but UpdateText example work so the problem is like i said i can't receive from nextion, on nextion, i only put 1 button to try the receive message, send component ID activated on it. And i receive anything on arduino when i touch the button. I tried to plug the nextion TX cable every where but it isnt working, i even setup the library for Serial1 and still not working, so i don't know what to do to fix it :c please help me

Hi bborncr,
I update all the instructions (readme.md) but the compiler show: expected identifier before numeric constant. I use Nextion 4.3" with Arduino Mega 2560.
This is my code:

include <Nextion.h>

define nextion HardwareSerial

nextion myNextion(nextion, 9600); // error compiler

boolean button1State;
boolean button2State;

// sensor "progress" bar
int x = 56;
int y = 321;
int width = 195;
int height = 8;

int old_sensor_value = 0;

void setup() {
// Serial.begin(9600);
myNextion.init();
}

void loop() {

String message = myNextion.listen();

if (message == "65 0 2 0 ffff ffff ffff") {
myNextion.buttonToggle(button1State, "b0", 0, 2);
}
if (message == "65 0 3 0 ffff ffff ffff") {
myNextion.buttonToggle(button2State, "b1", 0, 2);
}

int sensor = 0;

for (int i = 0; i < 10 ; i ++) { // get average
sensor += analogRead(A0);
}
sensor = sensor / 10;

if (abs(sensor - old_sensor_value) > 20) {
old_sensor_value = sensor;

int scaled_value = map(sensor, 0, 1023, 0, 100); // always map value from 0 to 100

myNextion.updateProgressBar(x, y, width, height, scaled_value, 0, 2); // update the progress bar
myNextion.setComponentText("t0", String(sensor));  // update text using original sensor value

}
}

Hello, I was using Nextion Display with Software Serial in my Arduino MEGA, then I changed to Hardware Serial... Everything works ok, when I press a button the Arduino recognizes it and make the right thing...

The only problem is after pressing any button which sends information to arduino, this information keeps repeating every 4-5 seconds, but it repeats only a part of the original sent variable.

Take a look in the log:

I'm using Nextion Display (normal edition) with Arduino MEGA 2560 in Hardware Serial port number 2

My display code is correct, when I use the debug option in Nextion HMI, there is no sending of values ​​from time to time. (And I checked all the code)

Hello. Love this library, because of it`s simplicity.
My problem: I can do nex.getComponentValue("page0.n" + String (variable));
also nex.setComponentValue("page0.n" + String (variable)); works.
How can i achieve nex.sendCommand("page0.n" + String (variable) + "bco=65533"); ?
Thank you.

My Arduino Due (HardwareSerial) stops running after performing this line.

"Nextion myNextion(Serial2, 9600);"

If i comment this out, everything is working fine - of course no display actions.

The Display is working, if i send the Commands directly.

Подскажите пожалуйста , как отправить команду с Arduino Nano на дисплей Nextion
click n0,1// Вызов события нажатия
delay=300
click n0,0// Вызов события отжатия
Данная команда проходит , если ее запускать в Nextion Editor.

Hi,

I noticed that these Libraries doesn't have the features to read inputs from Nextion to Arduino.
i.e. read the Text Component Value to Arduino or the Number Component value to Arduino.
Does anyone has such a code to do it?

Thanks.

I'm geting this error message at the line

String message = myNextion.listen();

Is there any known issues causing this? Am I doing something wrong?

The library is excellent and fast. Thank you.

I have one issue: some of my settings data which I enter in Nextion display are above 2^16 (65536); for example (66000), I only received the rest after 65536, which was 464. So, any number above 65536 can't be received correctly. I tried with different values; all were correct except the numbers above 65536. Please advise.

Arduino: 1.6.6 (Windows 7), Board: "Arduino Pro or Pro Mini, ATmega328 (5V, 16 MHz)"

C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SoftwareSerial\SoftwareSerial.cpp:375:6: warning: always_inline function might not be inlinable [-Wattributes]

void SoftwareSerial::setRxIntMsk(bool enable)

  ^

C:\Program Files (x86)\Arduino\hardware\arduino\avr\libraries\SoftwareSerial\SoftwareSerial.cpp:121:6: warning: always_inline function might not be inlinable [-Wattributes]

void SoftwareSerial::recv()

  ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:235:9: error: exponent has no digits

4ecc8e6

     ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp: In member function 'unsigned int Nextion::getComponentValue(String)':

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:131:25: warning: left shift count >= width of type [enabled by default]

 value = (temp[4] << 24) | (temp[3] << 16) | (temp[2] << 8) | (temp[1]);//Little-endian convertion

                     ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:131:43: warning: left shift count >= width of type [enabled by default]

 value = (temp[4] << 24) | (temp[3] << 16) | (temp[2] << 8) | (temp[1]);//Little-endian convertion

                                       ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp: In member function 'String Nextion::listen(long unsigned int)':

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:226:1: error: expected primary-expression before '<<' token

"<<<<<<< HEAD"

^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:226:3: error: expected primary-expression before '<<' token

<<<<<<< HEAD

^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:226:5: error: expected primary-expression before '<<' token

"<<<<<<< HEAD"

 ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:226:7: error: expected primary-expression before '<' token

" <<<<<<< HEAD"

   ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:226:9: error: 'HEAD' was not declared in this scope

"<<<<<<< HEAD"

     ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:234:3: error: expected primary-expression before '==' token

=======

^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:234:5: error: expected primary-expression before '==' token

=======

 ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:234:7: error: expected primary-expression before '=' token

=======

   ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:235:1: error: expected primary-expression before '>>' token

">>>>>>> 4ecc8e6"

^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:235:3: error: expected primary-expression before '>>' token

">>>>>>> 4ecc8e6"

^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:235:5: error: expected primary-expression before '>>' token

">>>>>>> 4ecc8e6"

 ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:235:7: error: expected primary-expression before '>' token

">>>>>>> 4ecc8e6"

   ^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:236:3: error: expected ';' before 'String'

String temp = "";

^

C:\Users\Owner\Documents\Arduino\libraries\nextion-master\Nextion.cpp:242:4: error: 'temp' was not declared in this scope

temp += String(cmd[i], HEX);//add hexadecimal value

^

exit status 1
Error compiling.

Hi there, I want to have multiple screens. one screen will be in portrait mode and the other one in landscape mode. can we do this with nexition? it only let me select one orienctation either landscape or potrait. can anyone help?

Hi there,

hopefully this lib is still supported by the community.
I´ve got some issues with the getComponentValue function.
I´m using the following code on my ESP32 using Hardware Serial2.
As soon as I toogle my button it should output the toogle button val on my serial monitor,
but I get this weired output. What did I wrong?

65 0 2 1 ff ff ff Toogle Button -1 q�???

`
#include <Nextion.h>

Nextion myNextion(nextion, 9600);

void NextionInit() {
if (myNextion.init()) {
Serial.println("Nextion Ready...");
} else {
Serial.println("Nextion not responding...");
}
}

void NextionListen() {
String message = myNextion.listen();
if (message != "") {
Serial.println(message);
if (message == "65 0 2 1 ff ff ff") {
Serial.println("Toogle Button");
int value = myNextion.getComponentValue("bt0");
Serial.println(value);
} else if (message == "65 0 3 1 ff ff ff") {
Serial.println("Simple Button");
myNextion.setComponentValue("bt0", 1);
}
}
}
`

Hi,
i am getting junk values from display when i try your example. I am not getting the button value "String". please help.