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32x32 LED RGB Matrix DFROBOT + Raspberry pi 3B+

Unread postPosted:Thu Feb 18, 2021 3:47 pm
by bibsras
hello everyone
I need help please
I want to control a DFROBOT RGB LED Matrix by a raspberry pi 3 b+ .

I have executed:
/examples-api-use $ sudo ./demo -D 0 --led-no-hardware-pulse --led-gpio-mapping=regular

I get:
Size: 32x32. Hardware gpio mapping: regular
Press to exit and reset LEDs

but the matrix does not light up !!!

Re: 32x32 LED RGB Matrix DFROBOT + Raspberry pi 3B+

Unread postPosted:Fri Feb 19, 2021 9:13 am
by 347945801
The most likely problem is insufficient power supply. You can try using additional power supply instead of Raspberry Pi.

Re: 32x32 LED RGB Matrix DFROBOT + Raspberry pi 3B+

Unread postPosted:Fri Feb 19, 2021 9:48 am
by bibsras
thank you for the answer,

no I don't think that's the problem, I use an additional power supply 5V/3A .
I don't know if I should change the --led-gpio-mapping= .?

I have DFR0472 32x32 RGB LED Matrix Panel.

Re: 32x32 LED RGB Matrix DFROBOT + Raspberry pi 3B+

Unread postPosted:Sat Feb 20, 2021 1:32 am
by 347945801
I learned that this dot matrix screen has changed the chip. I need to know which chip product you are using, TC7258GN or RUL5358.

Re: 32x32 LED RGB Matrix DFROBOT + Raspberry pi 3B+

Unread postPosted:Mon Feb 22, 2021 8:21 am
by bibsras
I don't really know how I can find the panel chip.
but there is something like "chip one ICN2025 A59611AD"

Re: 32x32 LED RGB Matrix DFROBOT + Raspberry pi 3B+

Unread postPosted:Wed Feb 24, 2021 2:43 am
by nana.wang
I found a very important problem. This dot matrix wiki does not describe the method used on the Raspberry Pi. It may be necessary for our engineers to develop this tutorial for using the dot matrix screen on the Raspberry Pi after the product manager puts forward the requirements.