# RGB P4 Panel 64\*32 RPi RGB LED MATRIX **URL:** \ **Category:** Uncategorized\ **Created:** [March 9, 2025, 9:49am UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028 "2025-03-09T09:49:26Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 9, 2025, 9:49am UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/1 "2025-03-09T09:49:26Z")
Hi, I try to use 3 P4 Panel with a raspberry Pi 3B. I bought those panel in 2020 i think and never use. I have installed RPI RGB LED MATRIx and compil it now its OK. I have this trouble i think param not good somewhere ! Panel have FM6124S I don’t use level shifter Command : sudo ./runtext.py --led-rows=32 --led-cols=192 --led-multiplexing=4 -t Test Press CTRL-C to stop sample ![](https://global.discourse-cdn.com/free1/uploads/rpi_rgb_led_matrix/original/1X/d7ebca64834109d718feb2522c553879fa04cf53.jpeg) [http://kmeg.free.fr/VID\_20250309\_092312.mp4](http://kmeg.free.fr/VID_20250309_092312.mp4) Thanks for ur help ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 11, 2025, 4:00pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/2 "2025-03-11T16:00:41Z")
Hi, Just add more info crazy just remove --led-multiplexing and work well now 😉 but freeze a little bit sudo ./runtext.py --led-rows=32 --led-cols=192 -t Test Look love have refresh low now [Link to video](http://kmeg.free.fr/VID_20250311_171728.mp4) ---
**Author:** ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707)\ **Post date:** [March 11, 2025, 5:08pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/3 "2025-03-11T17:08:31Z")
> [@bypbop](#): > > –led-rows=32 --led-cols=192 What are these strange dimensions of the panel? Do you know that you have set a dimensions of the SINGLE panel here. Is your panel a 192 pixels wide? ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 12, 2025, 7:02am UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/4 "2025-03-12T07:02:23Z")
Thanks for reply Have P4 Panel 32\*64 I put 192 because have 3 panels 64x3 im right ? ---
**Author:** ![board707](https://avatars.discourse-cdn.com/v4/letter/b/bc79bd/32.png) [@board707](https://rpi-rgb-led-matrix.discourse.group/u/board707)\ **Post date:** [March 12, 2025, 8:53am UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/5 "2025-03-12T08:53:12Z")
> [@bypbop](#): > > I put 192 because have 3 panels 64x3 > im right ? I don’t think so See the “Connection” chapter in the README: > **[GitHub - hzeller/rpi-rgb-led-matrix: Controlling up to three chains of 64x64, 32x32,...](https://github.com/hzeller/rpi-rgb-led-matrix?tab=readme-ov-file#panel-connection)** > > Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO It seems that you have to use ```auto --led-rows=32 --led-cols=64 --led-chain=3 ``` ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 12, 2025, 6:50pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/6 "2025-03-12T18:50:43Z")
Thanks for ur reply works well like this sudo ./runtext.py --led-rows=32 --led-cols=64 --led-chain=3 -t Test But i don’t why have this look like frequency too high or too low ! can see clear when i try with blocks sudo ./grayscale-block.py --led-rows=32 --led-cols=64 --led-chain=3 [Video with Grayscale](http://kmeg.free.fr/VID_20250312_194116.mp4) [Video with Text](http://kmeg.free.fr/VID_20250312_194141.mp4) can see normally i read only yellow but have green also Thanks ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 13, 2025, 3:32pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/7 "2025-03-13T15:32:52Z")
Hi, Someone have idea why i get this result ? Look the video with grayscale please link [http://kmeg.free.fr/VID\_20250312\_194116.mp4](http://kmeg.free.fr/VID_20250312_194116.mp4) Regards ---
**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Post date:** [March 15, 2025, 12:23pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/8 "2025-03-15T12:23:39Z")
Does it work with just one panel before you wire everything? What have you tried? What command line options are you using? Have you tried the other ones in the README? there is no info in your point, you can’t expect help like this ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 15, 2025, 10:31pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/9 "2025-03-15T22:31:01Z")
> [@bypbop](#): > > sudo ./grayscale-block.py --led-rows=32 --led-cols=64 --led-chain=3 @marcmerlin Thanks for ur reply i get the same result with only one panel i just tried ! i use those command sudo ./grayscale-block.py --led-rows=32 --led-cols=64 --led-chain=3 sudo ./runtext.py --led-rows=32 --led-cols=64 --led-chain=3 -t Test I tried what you tell on the previous post i put 4.20 and i get something more better i think come from the voltage 3.3 from the Pi i will try to put level shifter when use level shifter i do all the pin except the ground so 16-3 = 13 pins of the panel ? with 4.20v link [kmeg.free.fr/VID\_20250315\_232216.mp4](http://kmeg.free.fr/VID_20250315_232216.mp4) with 5v link [kmeg.free.fr/VID\_20250312\_194116.mp4](http://kmeg.free.fr/VID_20250312_194116.mp4) ---
**Author:** ![bypbop](https://avatars.discourse-cdn.com/v4/letter/b/c67d28/32.png) [@bypbop](https://rpi-rgb-led-matrix.discourse.group/u/bypbop)\ **Post date:** [March 16, 2025, 9:04pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/10 "2025-03-16T21:04:19Z")
Thanks for ur help @marcmerlin Works well i try all one day crazy ! i found why come from the wire of powersuplly ! now enought for the current ! I see this when i put a little bit more for voltage i put 5.20 and better after check the cable and found why ! regards ---
**Author:** ![marcmerlin](https://yyz2.discourse-cdn.com/free1/user_avatar/rpi-rgb-led-matrix.discourse.group/marcmerlin/32/40_2.png) [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Post date:** [April 6, 2025, 5:37pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/rgb-p4-panel-64-32-rpi-rgb-led-matrix/1028/11 "2025-04-06T17:37:46Z")
level shifter is indeed for all the signal lines. Have you looked into the electrodragon board in the README for hardware? It’s $3, so cheap that it’s not worth trying to do your own.