Arduino Scrolling Message Display
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Arduino Scrolling Message Display
Sketch: pastebin.com/yH8AmG4c
MAX7219 Dot Matrix Module: amzn.to/2EcruyN
MAX72xx LED Matrix Display Library:
majicdesigns.github.io/MD_MAX...
Max72xx Library: github.com/MajicDesigns/MD_MA...
MDParola Library: github.com/MajicDesigns/MD_Pa... - วิทยาศาสตร์และเทคโนโลยี
Hi, how to get it moving towards right instead of left?
HY.
A very good job. But can you do it with HC-05 Bluetooth to change the message on your phone and with 2x MAX7219 Dot Matrix Module (or more)?
Thank you.
great description with details i enjoyed it my project will add temperature to a message i will have to figure that out programming is not my strong point thanks for the video
can i see the schematic diagram of that project please help me
The MAX7219 is an excellent chip...I liked this very much, I saw one of your previous video how to set that up in breadboard. It worked just fine.. you can use a bluetooth module to set the text from your mobile app too, build by using MIT app inventor
+Sayantan Maiti cool
Can i use this by gsm module bcz present iam doing it ...can you send me code for gsm
I should say, that I have read the earlier post and attempted to roll back the library. However, the error continues.
Cool sign.
When compiling the Program, the error appears: P' was not declared in this scope. What can be this mistake?
@@yazlmgelistiricisi1245 The hardware definition and variable declaration are missing.
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
// HARDWARE SPI
MD_Parola P = MD_Parola(HARDWARE_TYPE, CS_PIN, MAX_DEVICES);
You need to put those three lines in the header, I wrote them starting on line 42 of his program and it made it work, sort of. I'm getting the issue that each panel is being read individually so the message is repeating across all four rather than scrolling across them.
I am getting the same thing and I can't figure out how to fix it
hey, i like your videos. i would like to know if you could do one on the dot matrix boards that are 16x16 (cat. # in victoria Australia XC4607) as i have never seen one yet in any of the videos i have watched. i have even searched for them specifically and to no avail. thanks heaps. or maybe you could point me in the right direction. cheers.
Cool can use for an indoor bar!
I got this dot matrix display a couple of days ago. The plan is to make a BTC ticker using this instead of a Oled or similar (just watched your other video with just that). Wish me luck! :P
+Daniel Göthlund Good luck, you got this
Does this library allow for the creation of custom characters? Seems like something fun for the back window of the car. Thanks again for another video!
+George Chambers Yes I believe that it does, and the author, Marco Colli has excellent documentation.
Very nice. I'll check it out thanks. I hope your Dad is getting better!
Thank you
Thanks fir posting are you able to add bluetooth add up date the message from your phone
Not with the Uno I used here. But if we switch to an ESP32 you can do Bluetooth or even WiFi!
What alteration does the code need to bypass the way it stalls with the last characters of the message showing before it scrolls them away?
probably the character delay timing
sketch_nov12a:91: error: 'P' was not declared in this scope
if (P.displayAnimate())
^
exit status 1
'P' was not declared in this scope
PS. Is this an example that already comes in the Parola Scrolling library?
The library has been updated since I wrote this sketch over a year ago the new library is not compatible with my sketch
Good wee project for the future (for me that is)!
+gartmorn enjoy my friend
where do you write the dinamic text at the end of vdo? in serial monitor?
Yes
Cool
Sir
I used arduino uno & max7219 dot matrix 4 module and used md parola library include spi max 72xx also ...all connection r ok but the display in reverse direction and each module ... i cannot understand why this occured please help me .
Thank u
Chevk your configuration in the .h file.
Yeah, i have the exact same problem... but what do we have to configure in the .h file?
NOTE: You no longer need to make the modification in the Parola/MAX72xx Library as may be noted in the video. In the updated EXAMPLES there is now a line that reads:
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
And you can change the "PAROLA_HW" to the type of board/matrix you are using.
For example I use the FC-16 boards so I changed the define to:
#define HARDWARE_TYPE MD_MAX72XX::FC16_HW
You can find the enum moduleType_t definition in the MD_MAX72xx.h file at around line # 265 to define which module you are using.
Hello, I am trying this sketch and am getting this error when verifying -->'P' was not declared in this scope
same me
Code fix still not published ?????
mine says MD_Parloa.h> no such file or dictionary. can you help?
Line 70 is a not a newline char, it's a null terminator. 😏
I keep getting 'P' was not declared in this scope
0hPhuc so what did you do...
I ended up rolling back to a previous library and everything worked
what library did you use?
I use two libraries with the LED matrix. MD_MAX72XX ver 2.10.0 and MD_Parola ver 2.6.4 It was the latter library that I rolled back two versions to get it to work.
i tried the same but i keep getting same error
Please, uploading dropbox code
I get the following errors:
In file included from /home/willemse/Arduino/Arduino_scrolling_text/Arduino_scrolling_text.ino:13:0:
/home/willemse/Arduino/libraries/MD_Parola/src/MD_Parola.h:777:3: warning: 'typedef' was ignored in this declaration
};
^
/home/willemse/Arduino/Arduino_scrolling_text/Arduino_scrolling_text.ino: In function 'void setup()':
Arduino_scrolling_text:86: error: 'P' was not declared in this scope
P.begin(); //MD Parola parameter - begin
^
/home/willemse/Arduino/Arduino_scrolling_text/Arduino_scrolling_text.ino: In function 'void loop()':
Arduino_scrolling_text:102: error: 'P' was not declared in this scope
if (P.displayAnimate())
^
exit status 1
'P' was not declared in this scope
Does anybody know what is wrong ??
Han Willemsen so what did you do...
Same with me too...
here the words are inverted, how do I solve it?
learn to read backwards?
mirror text help please!!!
Use new version of MD_Max72xx and MD_Parola libraries. And try Parola example sketch called "Scrolling". In code, line 43 you'll see:
#define HARDWARE_TYPE MD_MAX72XX::PAROLA_HW
change PAROLA_HW to your match your Max7219 type. Mine is FC16_HW
So it will look like this -> #define HARDWARE_TYPE MD_MAX72XX::FC16_HW
don't forget "_HW "
Google for different hardware type of Max7219.
Where is your code
Wifi wwo 1 se 7219 joit
Thank you friends. I speak spanish
You speak french?
Sorry, no.
@@learnelectronics would you know a program to put the time like that on 8 matrix led?
Jumble words
Hello, could you help me? I have this error:
Arduino:1.8.19 (Windows 10), Scheda:"Arduino Uno"
C:\Users\6767s\Desktop\Arduino\orologio LEARN ELETRONICS\003333\003333.ino: In function 'void setup()':
003333:87:3: error: 'P' was not declared in this scope
P.begin(); //MD Parola parameter - begin
^
C:\Users\6767s\Desktop\Arduino\orologio LEARN ELETRONICS\003333\003333.ino:87:3: note: suggested alternative: 'PI'
P.begin(); //MD Parola parameter - begin
^
PI
C:\Users\6767s\Desktop\Arduino\orologio LEARN ELETRONICS\003333\003333.ino: In function 'void loop()':
003333:103:7: error: 'P' was not declared in this scope
if (P.displayAnimate())
^
C:\Users\6767s\Desktop\Arduino\orologio LEARN ELETRONICS\003333\003333.ino:103:7: note: suggested alternative: 'PI'
if (P.displayAnimate())
^
PI
exit status 1
'P' was not declared in this scope
Questo report potrebbe essere più ricco di informazioni abilitando l'opzione
"Mostra un output dettagliato durante la compilazione"
in "File -> Impostazioni"
thank you