Comments on: ESP8266/Arduino: MAX7219 8×8 Led Matrix Library

By: Kasun Hasanka

Kasun Hasanka — Tue, 23 Jul 2019 08:06:38 +0000

In reply to philippedc. I have same problem here, Could please explain how rotate this letters ple

By: Walter

Walter — Sat, 19 Jan 2019 21:00:28 +0000

Same question like Alex. I’ve got a 4 in a row block, also. Is there an easy way to rotate the allignment? It is like to exchange x and y axis and to exchange the order. Is there an option in your library to do something like that?

By: philippedc

philippedc — Sat, 29 Dec 2018 18:18:44 +0000

In reply to david fathers. Hi Daniel, many thanks for your library, it helps a lot in my projects. Hi David, can you expalin how you rotate the matrix view please ? Thanks

By: Alex

Alex — Wed, 14 Dec 2016 20:25:56 +0000

Hello. I have a 4 in 1 block of max7219 How to rotate text on 90 degrees counterclockwise on each matrix? Thanks

By: Tam

Tam — Fri, 11 Nov 2016 05:24:09 +0000

Thanks for the code! Works great after a couple of tries. For those who tried to use the supplied AnimateText Arduino code and didn’t work, try including the font library that is bundled with it. For some reason it was left out.

I also couldn’t define CS_PIN 2 to something else. I tried pin 12 (since it’s right next to pins 13 and 14) but didn’t seem to respond so I switched it back. Not sure if anyone has found the solution to this, but not a big deal.

By: squix78

squix78 — Mon, 29 Aug 2016 18:55:49 +0000

In reply to david fathers.

Hi David. That sounds interesting. How did you attach the 8 (and more) modules? All on the same I2C bus or on different pins? I also don’t see a reason why more shouldn’t work, except maybe for the memory. If you have separate instances of the display driver each allocates a part of the memory for buffering before writing to the display. It could be that you use all the available memory…
Regards,
Daniel

By: david fathers

david fathers — Mon, 22 Aug 2016 09:48:12 +0000

Brilliant programming – lots of features. Can even add a wifi access point server alongside to change the scrolling text. Also have rotated the font so that it could be viewed as a vertically scrolling display. One question, I cannot see, software-wise why it should not work for more than 8 modules – though cannot get it to work. I wonder if the power drain is too great. Will try a non-inverting 5V level shifter for my Wemos D1 R2. Thanks again Daniel.

By: Unknown

Unknown — Tue, 05 Apr 2016 09:37:56 +0000

In reply to John Magill. I am having the same issue, did you find a way around this?

By: Juergen Klein

Juergen Klein — Sun, 03 Jan 2016 20:25:04 +0000

In reply to Anonymous. same here

By: John Magill

John Magill — Mon, 16 Nov 2015 14:09:03 +0000

My 8×8 (4 off) are already joined together as a unit and the letters scroll vertically. Basically I'm asking if I can alter the code to swing the matrix character map through 90 degrees. thanks
John