Arduino Scrolling Message Display

Arduino Scrolling Message Display

MAX72xx LED Matrix Display Library:

[airtonchinaglia]

When compiling the Program, the error appears: P' was not declared in this scope. What can be this mistake?

[sayantanmaiti]

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

[robertjohnson]

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

[smiht]

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.

[jeffreycashen]

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.

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

[Dancopymus]

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?

[frodemolland]

Hi, how to get it moving towards right instead of left?

[MrTeejay]

I should say, that I have read the earlier post and attempted to roll back the library. However, the error continues.

[aimaefidelino]

can i see the schematic diagram of that project please help me

[georgechambers]

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!

[jw]

I get the following errors:

In file included from
warning: 'typedef' was ignored in this declaration
};
^
In function 'void setup()':
Arduino_scrolling_text:86: error: 'P' was not declared in this scope
P.begin(); //MD Parola parameter - begin
^
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 ??

[barot]

Hello, could you help me? I have this error:
Arduino:1.8.19 (Windows 10), Scheda:"Arduino Uno"





















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

^

LEARN note: suggested alternative: 'PI'

P.begin(); //MD Parola parameter - begin

^

PI

LEARN ELETRONICS\003333\003333.ino: In function 'void loop()':

003333:103:7: error: 'P' was not declared in this scope

if (P.displayAnimate())

^

LEARN 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

[sree-]

Can i use this by gsm module bcz present iam doing it ...can you send me code for gsm

[hPhuc]

I keep getting 'P' was not declared in this scope

[peterdavidson]

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?

[annadenaro]

mine says MD_Parloa.h> no such file or dictionary. can you help?

[nuovovideo]

where do you write the dinamic text at the end of vdo? in serial monitor?

[MrTeejay]

Hello, I am trying this sketch and am getting this error when verifying -->'P' was not declared in this scope<--. What can I do to correct this issue?

[gartmorn]

Good wee project for the future (for me that is)!