Arduino UNO R4 WiFi LED Demo

element14 sent me an Arduino UNO R4 WiFi, which features a Renesas RA4M1 MCU. (Arm Cortex M4 48MHz).

This is a major upgrade over the original UNO. It is also a lot of fun to play with since it comes with a 12x8 LED matrix.

This is a quick demo of the LEDs in action...

Thank you element14 for this excellent MCU module.

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dougw over 2 years ago +7

I think I posted this in the wrong area - I can't edit it. I worked out the graphics with a spreadsheet that shows the graphic as you enter ones in cells and computes the 32 bit hex numbers for the program…
javagoza over 2 years ago +2

Great! You can also use the online LED matrix editor ledmatrix-editor.arduino.cc/
dougw over 2 years ago in reply to robogary +2

I didn't measure performance, although I had it scrolling so fast it was just a blur. This LED matrix is more capable than the micro:bit, the spacing also is tighter which makes the graphics more readable…

dougw over 2 years ago in reply to robogary

I didn't measure performance, although I had it scrolling so fast it was just a blur. This LED matrix is more capable than the micro:bit, the spacing also is tighter which makes the graphics more readable. And I got the LEDs to be viewable by my camera - the micro:bit multiplexing makes that display tough to video.
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dougw over 2 years ago in reply to cstanton

Thanks.
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dougw over 2 years ago

Note - I have covered the LEDs with dark window tint film to hide the unlit LEDs.

I also made a demo using the Arduino UNO R4 Minima which I received at the same time. That demo, linked here, is a much bigger display.
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kmikemoo over 2 years ago

Thank you for posting this, dougw .Mine arrived a few days ago but I haven't made the time to fire it up yet. I'm excited to give it a whirl. I love Arduinos.
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navadeepganeshu over 2 years ago

Great! Thanks for sharing about this. I was looking at the features of this board and a comparison table of memory, RAM and peripherals with an earlier UNO version - just amazing.

Renesas somehow has a very good MCU product line and application specific veraints in a family all at a relatively lower pricepoint.
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DAB over 2 years ago

Nice, I look forward to seeing you put it to use.
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DAB over 2 years ago in reply to dougw

We had to use this approach when we were putting text and symbols on displays in the 1980's.

You still have to understand the bits and bytes.
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bidrohini over 2 years ago in reply to cstanton

Thank you so much. I am confused about which one will be more convenient. Wifi or Minima?
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mayermakes over 2 years ago in reply to bidrohini

if you just want an mcu board, go minima, if wifi and the matrix are features you need go wifi, I got both, so I can use whatever feels apropriate depending on the project.
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