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MajicDesigns / MD_Parola

Library for modular scrolling LED matrix text displays
GNU Lesser General Public License v2.1
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Arduino nano iot 33 #88

Closed eawystr closed 3 years ago

eawystr commented 3 years ago

IMPORTANT

Before submitting this issue [x] Have you tried using the latest version of the library? [x] Have you checked this has not already been submitted and/or resolved? [ ] If you are requesting help a better choice may be the Arduino forum

Subject of the issue

Arduino nano iot 33 compatibility

Your Environment

Library Version: 3.5.6 Arduino IDE version: 1.8.15 Host OS and Version: Windows 10

Steps to Reproduce

When testing any of the examples with an arduino nano iot 33 it does not work. The display shows horizontal lines going down all the time. I have tested with an arduino nano and everything works fine.

MajicDesigns commented 3 years ago

I can't see why not and you really have not provided enough details to diagnose anything.

  1. The nano iot33 is a 3.3V device and the matrix controller is a 5V device. Do you have a voltage shifter for the signals between the two devices?
  2. Is the power supply adequate to power your matrix chain (you don't say how many). You may need a separate power supply from the USB port, with the grounds connected together.
  3. Do you have the right pins connected if you are using hardware SPI and, if not using hardware SPI, do the pins match what is in the sketch.
MajicDesigns commented 3 years ago

Closed due to lack of response