Video tutorial displays NEXTION

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#61 17558821 14 Nov 2018 13:13

sq9cyg sq9cyg

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Post #61
17558821 14 Nov 2018 13:13

I did a temperature measurement on two dss and control two relays.
As per comments on calling the procedure "temperatureDisplay ();" w void: loop, the relays control from the touch display works.
But as he comments, the output control does not work ...

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[/ code]
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#62 17558905 14 Nov 2018 14:44

ekrzychoooo ekrzychoooo

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Post #62
17558905 14 Nov 2018 14:44

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Perhaps the program gets stuck in temperatureDisplay (), specifically temp8E.setText (buffer0); temp8E on page 4 you have a button on 6.
See the movie about global vs local.

Added after 36 [minutes]:

Another float conversion to ascii

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here i show that is not an itoa function
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#63 17558989 14 Nov 2018 14:46

sq9cyg sq9cyg

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Post #63
17558989 14 Nov 2018 14:46

I moved everything to one side but the same effect ...
This is exactly where the program gets stuck
#64 17559002 14 Nov 2018 14:52

ekrzychoooo ekrzychoooo

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Post #64
17559002 14 Nov 2018 14:52

keep moving the Serial.print ("return display"); line up until you know where they are stuck.
Have you changed the following lines after the changes in the display?

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#65 17559314 14 Nov 2018 17:43

Anonymous Anonymous

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Post #65
17559314 14 Nov 2018 17:43

Tell me "ekrzychoooo" because I can see you get these displays. Are the GPIO versions 3.3V or 5V?

0-pull up input, 1-input binding, 2-push pull output,
3-PWM output, 4-open drain output.

The second thing is why, when I set it in mode 4, it blocks my inclusion on another website?
And a small question from a beginner, is it possible to connect a dth sensor to these ports? write a library on the page so that it reads directly.
#66 17560503 15 Nov 2018 00:52

ekrzychoooo ekrzychoooo

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Post #66
17560503 15 Nov 2018 00:52

Quote:
Are the GPIO versions 3.3V or 5V?

This is what they are not making clear about. But you can call where these pins go. These displays are probably on the STM32. When you get where these pins go, you can find out from the documentation of the scalak if you can give 5V there.

Quote:
The second thing is why, when I set it in mode 4, it blocks my inclusion on another website?

I don't really understand what's going on. Can you embed the hmi file?

Quote:
Can you connect, for example, a dth sensor to these ports? write a library on the page so that it reads directly.

Sure it could, but it will be a BASCOM-like program or worse. (no function in these display codes). In one of the films I showed how to make a GOSUB substitute, but it can be done only temporarily.
#67 17563448 16 Nov 2018 12:34

sq9cyg sq9cyg

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Post #67
17563448 16 Nov 2018 12:34

ekrzychoooo wrote:
keep moving the Serial.print ("return display"); line up until you know where they are stuck.
Have you changed the following lines after the changes in the display?

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Yes, yes I changed of course that I did.
Moving serial.print does nothing within the temperatureDisplay (); procedure.
Through the serial port monitor, all the time the measurement is ...
After commenting the lines //temp8E.setText(buffer0); the program is running normally. That is, the temperature is measured by the serial port monitor, you know nothing is displayed on the display, but the output control works OK.
#68 17563514 16 Nov 2018 13:10

ekrzychoooo ekrzychoooo

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Post #68
17563514 16 Nov 2018 13:10

Give it a try
temp8E.setText ("1234");
If this works, buffer0 contains bad data (no null character to terminate text).
In post # 62 I also wrote:

ekrzychoooo wrote:
Another float conversion to ascii

Code: c [expand] [select all]

itoa (tempC1, buffer0, 10);

here I am showing that not an itoa function
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#69 17563539 16 Nov 2018 13:26

sq9cyg sq9cyg

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Post #69
17563539 16 Nov 2018 13:26

ekrzychoooo wrote:
Give it a try
temp8E.setText ("1234");
If this works, buffer0 contains bad data (no null character to terminate text).
In post # 62 I also wrote:

ekrzychoooo wrote:
Another float conversion to ascii

Code: c [expand] [select all]

itoa (tempC1, buffer0, 10);

here I am showing that not an itoa function

Yes yes I changed it, sorry I did not write ...

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However, unfortunately the mere insertion of temp8E.setText ("1234"); already blocks control of relays ....
#70 17563582 16 Nov 2018 13:51

ekrzychoooo ekrzychoooo

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Post #70
17563582 16 Nov 2018 13:51

Maybe it will help you
setText function:

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next

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and

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and

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you can see that even with no response from the display, the setText function may get stuck for 100ms.

Insert here attachment with arduino file and hmi file. Maybe I'll find some time for the test over the weekend.
#71 17563626 16 Nov 2018 14:17

sq9cyg sq9cyg

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Post #71
17563626 16 Nov 2018 14:17

Inserted.
Thank you in advance.

Attachments:

sketch_test_przekaznikow.zip Download (31.86 KB)
#72 17567714 18 Nov 2018 13:12

ekrzychoooo ekrzychoooo

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Post #72
17567714 18 Nov 2018 13:12

I don't know what arduino you are using.
I put it on the pro-mini and wherever Serial.print is, it goes to the display and it makes one big bigos.

For posterity:

As you provide the arduino code to check, send the NexConfig.h file

The configuration of uart ports depends on this file.
#73 17567885 18 Nov 2018 14:19

sq9cyg sq9cyg

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Post #73
17567885 18 Nov 2018 14:19

Arduino mega2560.
The mere display of the serial port on the monitor is OK ...
Unfortunately, on the display itself, the nextion breaks; (
#74 17568050 18 Nov 2018 15:27

ekrzychoooo ekrzychoooo

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Post #74
17568050 18 Nov 2018 15:27

The case turned out to be more complicated than I expected.
If we use the ObjTXT.setText ("text") function in the program quite intensively; this is a very complicated matter. first things first.
After starting arduino we have something like this:
Przechwyty..nie.PNG Download (23.09 kB)
in the MCU return window you can see that arduino sends bkcmd = 1 and according to the documentation it should be 2.
Przechwyty..ie2.PNG Download (13.1 kB)
In setup you can force it with the command:

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Look at the setText function

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and there is a sendCommand function that looks like this:

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You can see that it "eats" the data from the input buffer.
after pressing the button on the display, the display sends to arduino e.g. 65 04 03 00 FF FF FF
Przechwyty..ie3.PNG Download (24.91 kB)
ie the info about a keystroke goes to arduino but gets swallowed up by the setText () function.
The solution is, for example, displaying the temperature, e.g. every 2 seconds. Well, this is a solution called "bypass technologies"
I guess these libraries should be reworked a bit because they are not perfect.
I will think about it and speak up. Maybe a new episode on Youtube.
And my advice is that in the project we use a debugger on the PC and when everything works, we only send it to the display. You can see inbound and outbound data in the debugger.
#75 17587220 26 Nov 2018 18:21

sq9cyg sq9cyg

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Post #75
17587220 26 Nov 2018 18:21

I'm looking forward.

#76 17588027 26 Nov 2018 22:19

Anonymous Anonymous

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Post #76

17588027 26 Nov 2018 22:19

I am surprised that something shows this arduino code at all, it's one big brothel and garbage. And so, looking at it as a beginner, I don't see a pentle declared for displaying temperatures in the nextion

void loop() {
    Serial.print("Requesting temperatures...");
  sensors.requestTemperatures();
  Serial.println("DONE");

  // print the device information
  printData(insideThermometer);
  printData(outsideThermometer);

  temperatureDisplay();

    nexLoop(nex_Listen_List);
  

}

NexTouch *nex_Listen_List[] = 
{
  &b0,&b1,
NULL
};

void b0PopCallback(void *ptr){
  digitalWrite(4,!digitalRead(4));
    
}

void b1PopCallback(void *ptr){
  digitalWrite(3,!digitalRead(3));  
}

And where is the code for displaying temperatures?

it won't work

number = ((float)tempC1/60)*180-30;
memset(buffer0, 0, sizeof(buffer0));
String temp1txt = String (tempC1,2);
temp1txt.toCharArray(buffer0,10);
//temp8E.setText(buffer0);
//temp8E.setText("1234"); 
number1 = ((float)tempC2/60)*180-30;
memset(buffer1, 0, sizeof(buffer1));
String temp2txt = String (tempC2,2);
temp2txt.toCharArray(buffer1,10);
//temp56.setText(buffer1);

NexText temp8E = NexText(4,1,"tem");
NexText temp56 = NexText(4,5,"tem1");

#77 17588534 27 Nov 2018 09:20

sq9cyg sq9cyg

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Post #77
17588534 27 Nov 2018 09:20

Then write why?
I am a great beginner so every remark is appreciated.
#78 17589354 27 Nov 2018 17:26

Anonymous Anonymous

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Post #78
17589354 27 Nov 2018 17:26

First of all, there is a bug in this ID.

Secondly, there are no defined temp8E, temp56.
#79 17589637 27 Nov 2018 19:07

ekrzychoooo ekrzychoooo

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Post #79
17589637 27 Nov 2018 19:07

1. I do ctrl-F here on the page and type in temp8E and there is a definition in statement # 61.
2. Even if the ID is bad, the setText function works after objName. Which doesn't mean the code can be messy.
#80 17591504 28 Nov 2018 16:34

Anonymous Anonymous

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Post #80
17591504 28 Nov 2018 16:34

And here I can see it.

I am also struggling with a similar pressure sensor, the whole program for the dht sensor and the pressure was detected that it is integers / floating point numbers.
#81 17619718 11 Dec 2018 14:13

kaino kaino

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Post #81
17619718 11 Dec 2018 14:13

I have a question, how to call a given page from arduino in nextion?

i.e. how does it exceed the dc temperature to display pages s1
#82 17619734 11 Dec 2018 14:23

Anonymous Anonymous

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Post #82
17619734 11 Dec 2018 14:23

0x66 Current Page Number 0x66 0x01 0xFF 0xFF 0xFF
Returned when the sendme command is used.
0x01 is current page number
data: page 1
#83 17619745 11 Dec 2018 14:28

kaino kaino

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Post #83
17619745 11 Dec 2018 14:28

Jarzabek666 wrote:
0x66 Current Page Number 0x66 0x01 0xFF 0xFF 0xFF
Returned when the sendme command is used.
0x01 is current page number
data: page 1

NIe bardzo mi to cos mówi
#84 17619753 11 Dec 2018 14:34

Anonymous Anonymous

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Post #84
17619753 11 Dec 2018 14:34

Well, I can't help you that you do not know the basic instructions of the display, this function works both ways, i.e. it sends ardunio which page is loaded and ardunio can send which page to load.

Please see this https://nextion.itead.cc/resources/documents/instruction-set/
#85 17619788 11 Dec 2018 14:52

kaino kaino

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Post #85
17619788 11 Dec 2018 14:52

Jarzabek666 wrote:
Well, I can't help you that you do not know the basic instructions of the display, this function works both ways, i.e. it sends ardunio which page is loaded and ardunio can send which page to load.

Please see this https://nextion.itead.cc/resources/documents/instruction-set/

sendCommand ("0x66 0X02 0XFF 0XFF 0XFF");

side id is 2

and its not working
#86 17619808 11 Dec 2018 15:09

Slawek K. Slawek K.

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Post #86
17619808 11 Dec 2018 15:09

Send the command using sencommand: page page_num, ie eg senCommand ("page 1");

Greetings
#87 17619809 11 Dec 2018 15:10

kaino kaino

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Post #87
17619809 11 Dec 2018 15:10

rs6000 wrote:
Send using sencommand the command: page page_num, that is for example "page 1"

Greetings

I have already done so

myNextion.sendCommand ("page 0");

but it doesn't work
#88 17619813 11 Dec 2018 16:13

Slawek K. Slawek K.

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Post #88
17619813 11 Dec 2018 16:13

It must work, you may have a bug in the conditional statement, call it in eg setup and check it.

Possr

Added after 59 [minutes]:

Try again like this:

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assuming the iD of the page you want to call is 2.

Greetings
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#89 17624539 13 Dec 2018 16:41

moeneo moeneo

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Post #89
17624539 13 Dec 2018 16:41

Hello. thanks the author for extensive tutorials.
#90 17673885 03 Jan 2019 20:58

sq9cyg sq9cyg

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Post #90
17673885 03 Jan 2019 20:58

Has anyone managed to solve my problem?
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Topic summary

A new video tutorial series for NEXTION displays is being developed, focusing on various functionalities and programming techniques. Users discuss the capabilities of NEXTION displays, including sending commands, managing timers, and handling multiple pages. Key topics include using buttons to control outputs, sending data from Arduino to NEXTION, and managing display states across different pages. Users share code snippets for specific tasks, such as updating text fields based on variable values and implementing timers. There are also discussions about troubleshooting issues related to memory usage on Arduino, interfacing with GPS modules, and optimizing communication between Arduino and NEXTION displays.
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