[posted] Programmierbarer WS2812B LED-Strip Controller

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XForce

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Hier mal ein programmierbarer LED-Controller für die WS2812B Strips.
Umgesetzt mit dem Teensy 4.1 und einem Nextion-Display.

Ist zwar momentan noch recht wust aufgebaut aber tut was er soll.

Der eigentliche Controller für die LED-Strips
LED-Strip-Controller.jpg

Gesteuert wird das ganze per Funkfernbedienung mit einem Nextion-Display
Muss halt alles noch schön verpackt werden damit es handlich wird :)
Funkfernbedienung2.jpg

Hier mal ein paar Bilder von der Bedienoberfläche
MainScreen.jpg

5 Effektprogramme können auf die Schnellwahltasten im Hauptbildschirm gelegt werden.
Schnellwahl.jpg

Verschiedenste Einstellungsmöglichkeiten
LED-Strip.jpg

DisplaySet.jpg

Clock.jpg

Settings1.jpg

Settings2.jpg

Sowie der eigentliche Effekteditor mit dem eigene Programme geschrieben werden können
Effekteditor.jpg

mehr Bilder im nächsten Post...
 
Last edited:
Die Effekte können nach belieben kombiniert werden
Effekte.jpg

Jeder Effekt hat noch einige Einstellungsmöglichkeiten
EffektSettings.jpg

Die Programmierung von Pausen und Schleifen ist natürlich auch möglich.

Die fertigen Programme können dann auf einer SD-Karte gespeichert werden.
FileManager.jpg

Info's zum Erstellungsdatum und dem letzten Bearbeitungsdatum werden zu jeder Datei in der FAT gespeichert und lassen sich
auch am PC in den Dateieigenschaften wiederfinden.
FileInfo.jpg

Info's zum Akkustand sowie -verbrauch der Fernbedienung können bei Bedarf auch abgefragt werden.
Akkumonitor.jpg

Als nette Spielerei gibts noch einen VU-Meter Modus.
VU-Meter.jpg

An den Programmen der Teensy's gibts sicherlich noch einiges zu verbessern. aber das Ganze läuft aktuell stabil und ließe sich
rein theoretisch per Funk in einem Umkreis von knapp 750m steuern (wer auch immer das in der Entfernung benötigen sollte).

Zum Verzweifeln sind nur die Libary's die Itead für die Display's hergibt. Entweder war ich da etwas unbedarft, oder die Funktionen sind
in gewissen Situationen recht langsam und nicht so wirklich zuverlässig, was mich dann dazu veranlasst hatte komplett von den Libary's wegzugehen und eigene Funktionen zur Displayansteuerung zu nutzen.

Zudem hatte ich zwischenzeitlich das Problem, dass sich nach dem Anschluß einer RTC-Batterie an den Teensy die Timings komischerweise so geändert haben, dass es bei der Funkübertragung Abbrüche gab. Hat man die Batterie wieder getrennt lief alles wieder einwandfrei. Mittlerweile läuft es auch mit angeschlossener RTC-Batterie, warum aber die Fehler aufgetreten sind hat sich mir bisher nicht ganz erschlossen.

Aktuell hab ich das Teil komplett über Akku laufen, ein Anschluß für ein Netzteil ist aber auch vorhanden.
Über die Software können LED-Strips mit einer maximalen Länge von 4.000 LED-Pixeln gesteuert werden.

Falls Interesse an den Schaltplänen und der Teensy- sowie Nextion-Firmware besteht gerne melden.
 
Last edited:
XForce said:
Hier mal ein programmierbarer LED-Controller für die WS2812B Strips.
Umgesetzt mit dem Teensy 4.1 und einem Nextion-Display.

Ist zwar momentan noch recht wust aufgebaut aber tut was er soll.

Der eigentliche Controller für die LED-Strips
View attachment 28546

Gesteuert wird das ganze per Funkfernbedienung mit einem Nextion-Display
Muss halt alles noch schön verpackt werden damit es handlich wird :)
View attachment 28547

Hier mal ein paar Bilder von der Bedienoberfläche
View attachment 28548

5 Effektprogramme können auf die Schnellwahltasten im Hauptbildschirm gelegt werden.
View attachment 28553

Verschiedenste Einstellungsmöglichkeiten
View attachment 28549

View attachment 28550

View attachment 28551

View attachment 28552

View attachment 28554

Sowie der eigentliche Effekteditor mit dem eigene Programme geschrieben werden können
View attachment 28555

mehr Bilder im nächsten Post...
Click to expand...

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Programmable WS2812B LED strip controller

Here is a programmable LED controller for the WS2812B strips.
Implemented with the Teensy 4.1 and a Nextion display.

It's still a mess at the moment, but does what it's supposed to do.

The actual controller for the LED strips
Click image for larger version. Name: LED-Strip-Controller.jpg Views: 2 Size: 116.2 KB ID: 28546

The whole thing is controlled by radio remote control with a Nextion display
Everything has to be packed nicely so that it is handy :)
Click image for larger version. Name: Radio remote control2.jpg Views: 1 Size: 98.3 KB ID: 28547

Here are a few pictures of the user interface
Click image for larger version. Name: MainScreen.jpg Views: 0 Size: 146.6 KB ID: 28548

5 effect programs can be assigned to the shortcut keys on the main screen.
Click image for larger version. Name: Schnellwahl.jpg Views: 0 Size: 157.6 KB ID: 28553

Various setting options
Click image for larger version. Name: LED-Strip.jpg Views: 0 Size: 112.8 KB ID: 28549

Click image for larger version. Name: DisplaySet.jpg Views: 0 Size: 117.2 KB ID: 28550

Click image for larger version. Name: Clock.jpg Views: 0 Size: 117.5 KB ID: 28551

Click image for larger version. Name: Settings1.jpg Views: 0 Size: 146.4 KB ID: 28552

Click image for larger version. Name: Settings2.jpg Views: 0 Size: 134.3 KB ID: 28554

As well as the actual effects editor with which you can write your own programs
Click image for larger version. Name: Effect Editor.jpg Views: 0 Size: 132.7 KB ID: 28555

more pics in the next post...
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Side panels
 
XForce said:
Die Effekte können nach belieben kombiniert werden
View attachment 28556

Jeder Effekt hat noch einige Einstellungsmöglichkeiten
View attachment 28557

Die Programmierung von Pausen und Schleifen ist natürlich auch möglich.

Die fertigen Programme können dann auf einer SD-Karte gespeichert werden.
View attachment 28558

Info's zum Erstellungsdatum und dem letzten Bearbeitungsdatum werden zu jeder Datei in der FAT gespeichert und lassen sich
auch am PC in den Dateieigenschaften wiederfinden.
View attachment 28559

Als nette Spielerei gibts noch einen VU-Meter Modus.
View attachment 28560

Aktuell hab ich das Teil komplett über Akku laufen, ein Anschluß für ein Netzteil ist aber auch vorhanden.
Über die Software können LED-Strips mit einer maximalen Länge von 4.000 LED-Pixeln gesteuert werden.

Falls Interesse an den Schaltplänen und der Teensy- sowie Nextion-Firmware besteht gerne melden.
Click to expand...

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The effects can be combined at will
Click image for larger version. Name: Effects.jpg Views: 0 Size: 176.6 KB ID: 28556

Each effect still has some setting options
Click image for larger version. Name: EffectSettings.jpg Views: 0 Size: 158.8 KB ID: 28557

The programming of pauses and loops is of course also possible.

The finished programs can then be stored on an SD card.
Click image for larger version. Name: FileManager.jpg Views: 1 Size: 166.8 KB ID: 28558

Information about the creation date and the last editing date is saved for each file in the FAT and can be
can also be found on the PC in the file properties.
Click image for larger version. Name: FileInfo.jpg Views: 0 Size: 151.4 KB ID: 28559

As a nice gimmick there is also a VU meter mode.
Click image for larger version. Name: VU-Meter.jpg Views: 0 Size: 139.1 KB ID: 28560

Currently I have the part running completely on battery, but there is also a connection for a power supply unit.
LED strips with a maximum length of 4,000 LED pixels can be controlled via the software.

If you are interested in the circuit diagrams or the Teensy and Nextion firmware, please let me know.
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Side panels
 
To despair are only the libaries that Itead gives for the displays. Either I was a bit inexperienced, or the functions are
quite slow and not really reliable in certain situations, which then led me to completely move away from the libaries and use my own functions for display control.
Click to expand...
I too am using the Nextion display and wrote my own Library. I had heard bad things about the Itead library and in any case I prefer to know what is going on in my system so I wrote my own library.
Have a look here and here. Not that I am suggesting that mine is better than yours, just that I might have done something different to you and it might give you a few ideas.
Regards
Bob Bridges
 
Nextion Library

BriComp said:
I too am using the Nextion display and wrote my own Library. I had heard bad things about the Itead library and in any case I prefer to know what is going on in my system so I wrote my own library.
Have a look here and here. Not that I am suggesting that mine is better than yours, just that I might have done something different to you and it might give you a few ideas.
Regards
Bob Bridges
Click to expand...

From my experience the only possible way to get a well function communication with the Display is to use something else instead the out of the box librarys from Itead. If I will have some more time I will study your Library in every detail. The first look at it was a very fine programmed library.
I can say it's definitly much more structured than mine.
But the LED Controller was also my third project with Arduino/Teensy because I began microcontroller programming just a year ago ;-)

But I wonder that you make more communication with the Display in use of numeric values because I have some problems with it. Generaly everything works but only the reading of numeric values from Display components makes some problems. I get the correct numeric value returned but the reading process needs much more time than the reading of text values so if I first make use of numeric values for the menu options of the LED-Controller it needs some seconds between the Save-Button press and the confirmation that everything was saved. With the use of text values I have
no noticable delay in reading and saving the values.

This is why I was very excited in your library how you solve this problem.

Many thanks in advance.
 
Hi XForce, thanks for those kind words.
As far as numbers are concerned, I see very little delay (about 5ms).
What numbers are you returning from the Nextion?
Perhaps you could give a snippet of your Nextion code.
For instance when one of the Dual-state buttons is pressed I have this Nextion code.
Code: 
  swResult=0x0600+page0.Sw6.val
  get swResult
The 0sx600 indicates which switch was pressed and obviously page0.Sw6.val the value.
So I see 0x601 or 0x600 as a returned value.
All my switches work the same returning values in the range 0x000 or 0x001 to 0x600 or 0x601.
I don't use "Send Component Id as it does not send the State of the Dual-State button, only that it is pressed or not.
Given that it is a press-on, press-off type of component the lack of return it's value is a deficiency in the Nextion.
 
That method you described is a really good one I didn't think about before. I have to try this one instead of what I do at the moment.

In past when I tryed to read numeric values the Display needs much more than approximately 5ms on top. First of all I read out direct the "val"-State of dual state buttons for example. Later I tryed to let the Nextion first write the button-value into a numeric variable and then read out the variable from Arduino/Teensy side. Both methods ends in the same issue with the unperformant delays. When I convert the numeric value over "covx" in text variable and read out this it's much faster although the Nextion has to do a little more to convert the value before I think. The last method is what I use at the moment if I want to read out a number. But the delays only happend while reading numbers. Writing a numeric value is as fast as read/write text values.

I had also the issue in past that every time after reset and newstart of the Display only the first try to read a number failed completely (Display return something but a completely different number) and after that every next try everything works correctly with exactly the same command line.
I absolutely didn't know why.

There is another thing that I'm wondering about. The serial communication of the Nextion doesn't support umlauts so I replace them with the ascii char code before send the text to the Display. Is it right that Arduino's doesn't support the function "replace". When I try to compile exactly the same code it run's when compiled for Teensy-Boards but when I chose a Arduino board the compiling failed. Do you know any other method to display umlauts in Text which is send from Arduino's to Nextion Display?
 
After "Reset" Nextion returns the following:-
|-------- Start up message -------| |- Ready Message -|
0x00 0x00 0x00 0xFF 0xFF 0xFF 0x88 0xFF 0xFF 0xFF
Click to expand...
You have to handle all of that data before getting any other values.
Have a look at my code for
Code: 
Nextion::reset(uint32_t br){
in my Nextion.cpp
 
...further to the above it might be that you are not reading all the reset data coming from the Nextion and the characters left in the serial buffer are corrupting the following data. Of course as soon as those corrupt values have cleared everything works ok.
 
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