# Uncategorized **URL:** https://rpi-rgb-led-matrix.discourse.group/c/uncategorized/1.md?page=2 [Latest](https://rpi-rgb-led-matrix.discourse.group/latest.md) · [Categories](https://rpi-rgb-led-matrix.discourse.group/categories.md) **Page:** 3 --- ## [How to register a pixel mapper cleanly (file-wise)?](https://rpi-rgb-led-matrix.discourse.group/t/how-to-register-a-pixel-mapper-cleanly-file-wise/1143)
**Author:** [@deadlift89](https://rpi-rgb-led-matrix.discourse.group/u/deadlift89)\ **Replies:** 7\ **Last updated:** [December 17, 2025, 7:02am UTC](https://rpi-rgb-led-matrix.discourse.group/t/how-to-register-a-pixel-mapper-cleanly-file-wise/1143 "2025-12-17T07:02:26Z")
Is there an elegant way to register custom pixel mappers globally without hacking or modifying any internal code or C++ build params within rpi-rgb-led-matrix directly? I also don’t want to have to import and register th… --- ## [Anyone willing to re-implement the led-image-viewer util as a library? Would consider paying](https://rpi-rgb-led-matrix.discourse.group/t/anyone-willing-to-re-implement-the-led-image-viewer-util-as-a-library-would-consider-paying/1162)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 7\ **Last updated:** [December 15, 2025, 6:36pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/anyone-willing-to-re-implement-the-led-image-viewer-util-as-a-library-would-consider-paying/1162 "2025-12-15T18:36:25Z")
I wish to have the functionality of the led-image-viewer, but as a library, not an executable. Why? Because if my app, for example, calls the led-image-viewer with -f(Play forever), and my app crashes, it leaves a child… --- ## [Can not find "Imaging.h" when doing pip3 install of bindings/python](https://rpi-rgb-led-matrix.discourse.group/t/can-not-find-imaging-h-when-doing-pip3-install-of-bindings-python/1139)
**Author:** [@Chris11jed](https://rpi-rgb-led-matrix.discourse.group/u/Chris11jed)\ **Replies:** 9\ **Last updated:** [December 15, 2025, 7:10am UTC](https://rpi-rgb-led-matrix.discourse.group/t/can-not-find-imaging-h-when-doing-pip3-install-of-bindings-python/1139 "2025-12-15T07:10:25Z")
Hi, I am trying to get mqtt installed on the Rpi 4B that holds the hzeller/rpi-rgb-led-matrix, so I can run scripts to show images, video, whatever. In the /home/dietpi/rpi-rgb-led-matrix/bindings/python directory, and… --- ## [P5(1921)64x32-8S](https://rpi-rgb-led-matrix.discourse.group/t/p5-1921-64x32-8s/1161)
**Author:** [@embeddedwolf](https://rpi-rgb-led-matrix.discourse.group/u/embeddedwolf)\ **Replies:** 22\ **Last updated:** [December 15, 2025, 7:06am UTC](https://rpi-rgb-led-matrix.discourse.group/t/p5-1921-64x32-8s/1161 "2025-12-15T07:06:11Z")
Hi, I am very new here , I am just working on a small project with esp32-S3 no PSRAM module, I have to display few words on HUB75-RGB panel on 128x32(64X32 two ), what I got from market consist of these two ICs ICN2037B … --- ## [Image-viewer inconsistent behavior between single images and animations](https://rpi-rgb-led-matrix.discourse.group/t/image-viewer-inconsistent-behavior-between-single-images-and-animations/1158)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 2\ **Last updated:** [December 15, 2025, 4:35am UTC](https://rpi-rgb-led-matrix.discourse.group/t/image-viewer-inconsistent-behavior-between-single-images-and-animations/1158 "2025-12-15T04:35:43Z")
I just made a PR to the docs with some notes about streams, but there is some other stuff that maybe needs addressing. -l\ : For animations: number of loops through a full cycle. This is inaccurat… --- ## [Power requirements in docs. Inaccurate?](https://rpi-rgb-led-matrix.discourse.group/t/power-requirements-in-docs-inaccurate/1159)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 9\ **Last updated:** [December 12, 2025, 11:55am UTC](https://rpi-rgb-led-matrix.discourse.group/t/power-requirements-in-docs-inaccurate/1159 "2025-12-12T11:55:49Z")
The docs say: Connection You need a separate power supply for the panel. There is a connector for that separate from the logic connector, typically a big one in the center of the board. The board requires 5V (double c… --- ## [Text-example using 5x7.bdf doesn't accept input](https://rpi-rgb-led-matrix.discourse.group/t/text-example-using-5x7-bdf-doesnt-accept-input/1155)
**Author:** [@cohenjm98](https://rpi-rgb-led-matrix.discourse.group/u/cohenjm98)\ **Replies:** 2\ **Last updated:** [December 8, 2025, 1:37pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/text-example-using-5x7-bdf-doesnt-accept-input/1155 "2025-12-08T13:37:03Z")
have successfully set up a pi2 using Seengreat RGB matrix adapter board with a Waveshare 64x32 display. I can run the demo and get images to display on the matrix. My problem is using the test-example program (I crea… --- ## [P10RGB-3535-4s ZAGGIZ 1/4scan ABC P10 panels and https://github.com/2dom/PxMatrix](https://rpi-rgb-led-matrix.discourse.group/t/p10rgb-3535-4s-zaggiz-1-4scan-abc-p10-panels-and-https-github-com-2dom-pxmatrix/921)
**Author:** [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Replies:** 5\ **Last updated:** [December 7, 2025, 10:11pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p10rgb-3535-4s-zaggiz-1-4scan-abc-p10-panels-and-https-github-com-2dom-pxmatrix/921 "2025-12-07T22:11:17Z")
Found those in my stash, just tried to see if they would work with rpi-rgb-panel. Of all address types, 0 is the closest one and after trying them, -led-multiplexing=4 is the zaggiz multiplexer that works root@DietPi:~… --- ## [I've created a custom mapper for GKGD P10-3216-4s-x1](https://rpi-rgb-led-matrix.discourse.group/t/ive-created-a-custom-mapper-for-gkgd-p10-3216-4s-x1/1151)
**Author:** [@kstr](https://rpi-rgb-led-matrix.discourse.group/u/kstr)\ **Replies:** 1\ **Last updated:** [December 2, 2025, 7:41am UTC](https://rpi-rgb-led-matrix.discourse.group/t/ive-created-a-custom-mapper-for-gkgd-p10-3216-4s-x1/1151 "2025-12-02T07:41:38Z")
I’ve created a custom mapper for GKGD P10-3216-4s-x1. These panels were giving me headaches. I’ve almost pulled my hair out, but then it suddenly worked :slight\_smile: . I’m not really familiar with linux or c++, so a… --- ## [Guidance sought on code archetecture for my project](https://rpi-rgb-led-matrix.discourse.group/t/guidance-sought-on-code-archetecture-for-my-project/1141)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 5\ **Last updated:** [December 1, 2025, 4:18pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/guidance-sought-on-code-archetecture-for-my-project/1141 "2025-12-01T16:18:11Z")
I am looking to build a wearable display, similar to what @marcmerlin has. I have a fair amount of coding experience in C# and Java and a little experience of JS / TS, but not C / C++ I would like the following feature… --- ## [Announcement: Big bug and PR cleanup as well as helping out the project](https://rpi-rgb-led-matrix.discourse.group/t/announcement-big-bug-and-pr-cleanup-as-well-as-helping-out-the-project/1150)
**Author:** [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Replies:** 2\ **Last updated:** [November 28, 2025, 6:58pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/announcement-big-bug-and-pr-cleanup-as-well-as-helping-out-the-project/1150 "2025-11-28T18:58:17Z")
For those who don’t know me, I’m not the developer, Henner is a friend and former coworker of mine, so I’m just a user and helping out. I went through all the Pull Requests and tried to approve the ones that looked safe… --- ## [How do I scroll text in specific areas using text-scroller?](https://rpi-rgb-led-matrix.discourse.group/t/how-do-i-scroll-text-in-specific-areas-using-text-scroller/1149)
**Author:** [@wakka0014](https://rpi-rgb-led-matrix.discourse.group/u/wakka0014)\ **Replies:** 5\ **Last updated:** [November 28, 2025, 7:34am UTC](https://rpi-rgb-led-matrix.discourse.group/t/how-do-i-scroll-text-in-specific-areas-using-text-scroller/1149 "2025-11-28T07:34:39Z")
I really love this library! This video has a total size of 128 pixels wide by 32 pixels high. Is there a way to scroll text in an area measuring 80 pixels wide by 16 pixels high in the bottom-right corner? --- ## [Can anyone recommend a known working \<=P1.875 128x64 flexible panel?](https://rpi-rgb-led-matrix.discourse.group/t/can-anyone-recommend-a-known-working-p1-875-128x64-flexible-panel/1147)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 6\ **Last updated:** [November 27, 2025, 9:24pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/can-anyone-recommend-a-known-working-p1-875-128x64-flexible-panel/1147 "2025-11-27T21:24:42Z")
I bought two P1.875 128x64 flexible panels, but despite being listed as tested on the DMD\_STM32 wiki, apparently according to @board707 they won’t work due to having ICND2153 drivers. Can anyone recommend an alternative… --- ## [Driving 2 chains and keeping GPIO pins free for buttons?](https://rpi-rgb-led-matrix.discourse.group/t/driving-2-chains-and-keeping-gpio-pins-free-for-buttons/1144)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 1\ **Last updated:** [November 27, 2025, 6:31am UTC](https://rpi-rgb-led-matrix.discourse.group/t/driving-2-chains-and-keeping-gpio-pins-free-for-buttons/1144 "2025-11-27T06:31:13Z")
I wish to drive 2 panels on a RPi Zero 2W. I don’t have my panels yet but am 99% sure each one only has inputs, so I am guessing that means 2 chains. I would also like to have some buttons to control functionality. I d… --- ## [URGENT - will not power on at all!](https://rpi-rgb-led-matrix.discourse.group/t/urgent-will-not-power-on-at-all/1136)
**Author:** [@sweh](https://rpi-rgb-led-matrix.discourse.group/u/sweh)\ **Replies:** 3\ **Last updated:** [November 27, 2025, 6:13am UTC](https://rpi-rgb-led-matrix.discourse.group/t/urgent-will-not-power-on-at-all/1136 "2025-11-27T06:13:33Z")
im really stumped..I’m working with a 128x64 HUB75 RGB LED panel connected through an ElectroDragon RGB Matrix HAT to a Raspberry Pi. I’m using the rpi-rgb-led-matrix library, and I’ve already rebuilt it multiple times, … --- ## [64x32 with Adafruit demo worked 1 time. Black bars](https://rpi-rgb-led-matrix.discourse.group/t/64x32-with-adafruit-demo-worked-1-time-black-bars/1137)
**Author:** [@danni\_design](https://rpi-rgb-led-matrix.discourse.group/u/danni_design)\ **Replies:** 3\ **Last updated:** [November 27, 2025, 6:11am UTC](https://rpi-rgb-led-matrix.discourse.group/t/64x32-with-adafruit-demo-worked-1-time-black-bars/1137 "2025-11-27T06:11:52Z")
Hello everyone, Today I tried to setup a P5 64x32 led screen. I tried the demo and was very happy that it worked. I then tried demo 3 to find out that it stopped working. Then i tried demo 0 and now I have these black b… --- ## [Panel compatible? ICND2153](https://rpi-rgb-led-matrix.discourse.group/t/panel-compatible-icnd2153/1146)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 2\ **Last updated:** [November 25, 2025, 11:07am UTC](https://rpi-rgb-led-matrix.discourse.group/t/panel-compatible-icnd2153/1146 "2025-11-25T11:07:04Z")
I purchased two of these panels (The P1.875 ones) I had no prior indication of what chipset they use, but upon receiving them, I see that the chips are Chipone ICND2153 AP The wiki for this library says that “This libr… --- ## [16 cols x 8 rows hub 75 p20 panel](https://rpi-rgb-led-matrix.discourse.group/t/16-cols-x-8-rows-hub-75-p20-panel/1138)
**Author:** [@Dotmatrix](https://rpi-rgb-led-matrix.discourse.group/u/Dotmatrix)\ **Replies:** 7\ **Last updated:** [November 20, 2025, 8:51am UTC](https://rpi-rgb-led-matrix.discourse.group/t/16-cols-x-8-rows-hub-75-p20-panel/1138 "2025-11-20T08:51:47Z")
thiz panel 16 cols x 8 rows . I am ha ving trou ble. Will the lib work with an 8 row panel ? --- ## [Feasibility questions surrounding wearable display](https://rpi-rgb-led-matrix.discourse.group/t/feasibility-questions-surrounding-wearable-display/1140)
**Author:** [@evilC](https://rpi-rgb-led-matrix.discourse.group/u/evilC)\ **Replies:** 12\ **Last updated:** [November 11, 2025, 7:50pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/feasibility-questions-surrounding-wearable-display/1140 "2025-11-11T19:50:49Z")
I currently own a wearable off-the-shelf display - a Loy T3-HD panel, which is a P2.0 96x128px panel. It came as a backpack, but I took the display out and designed and 3D printed a mount to attach it to a t-shirt. It … --- ## [Does anyone know what Hub75 matrix this is?](https://rpi-rgb-led-matrix.discourse.group/t/does-anyone-know-what-hub75-matrix-this-is/1127)
**Author:** [@sweh](https://rpi-rgb-led-matrix.discourse.group/u/sweh)\ **Replies:** 3\ **Last updated:** [October 26, 2025, 3:38am UTC](https://rpi-rgb-led-matrix.discourse.group/t/does-anyone-know-what-hub75-matrix-this-is/1127 "2025-10-26T03:38:21Z")
I’m just curious if anyone is able to tell me what this hub75 matrix interface is. I can’t recognize the logo on it but I’m building ancient James’ exact volumetric display. Any help would be greatly appreciated! … --- ## [Panel P2.5 128x64 Hub75 ABC no display](https://rpi-rgb-led-matrix.discourse.group/t/panel-p2-5-128x64-hub75-abc-no-display/1124)
**Author:** [@giga45632](https://rpi-rgb-led-matrix.discourse.group/u/giga45632)\ **Replies:** 7\ **Last updated:** [October 26, 2025, 3:37am UTC](https://rpi-rgb-led-matrix.discourse.group/t/panel-p2-5-128x64-hub75-abc-no-display/1124 "2025-10-26T03:37:01Z")
Hello everyone, I have four 128x64 P2.5 LED panels. I installed the rpi-rgb-led-matrix library. I tried numerous commands, but without success. I try with a pi 3 and pi 4. My Hardware A Raspberry Pi 4 with Pi OS Lite … --- ## [P1.953 128x128 LED Matrix, no display or random display](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130)
**Author:** [@DenizOzaydin](https://rpi-rgb-led-matrix.discourse.group/u/DenizOzaydin)\ **Replies:** 7\ **Last updated:** [October 26, 2025, 12:50am UTC](https://rpi-rgb-led-matrix.discourse.group/t/p1-953-128x128-led-matrix-no-display-or-random-display/1130 "2025-10-26T00:50:45Z")
Hello, I received a 128x128 panel from China a moment ago. Panel has several chips: DP32020A: for multiplexing (there are 32 of them) (Q1-16), (QA1-16) C84550P: I do not know the functionality (there are 96 of them) (U… --- ## [Trying to make countdown timer with colored circles on right side](https://rpi-rgb-led-matrix.discourse.group/t/trying-to-make-countdown-timer-with-colored-circles-on-right-side/1125)
**Author:** [@ARrocks](https://rpi-rgb-led-matrix.discourse.group/u/ARrocks)\ **Replies:** 2\ **Last updated:** [October 18, 2025, 12:01pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/trying-to-make-countdown-timer-with-colored-circles-on-right-side/1125 "2025-10-18T12:01:23Z")
I am trying to use rpi-rgb-matrix to make a count down timer for my archery range. I need to be able to set for 4 minutes (we have some other rounds with different times), also a stoplight style red, yellow, green ligh… --- ## [64x32 single color panel build](https://rpi-rgb-led-matrix.discourse.group/t/64x32-single-color-panel-build/1122)
**Author:** [@V8Power](https://rpi-rgb-led-matrix.discourse.group/u/V8Power)\ **Replies:** 5\ **Last updated:** [October 17, 2025, 8:35pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/64x32-single-color-panel-build/1122 "2025-10-17T20:35:30Z")
I’m designing a 64x32 panel with yellow LED’s. This is a high brightness panel with a 1:8 multiplexing ratio. Dimming is also needed. To dim it I’m using a TPS54331 with a bit of voltage adjustment circuitry added. I’m u… --- ## [Updated documentation to show double width Vmapper with 52 panels](https://rpi-rgb-led-matrix.discourse.group/t/updated-documentation-to-show-double-width-vmapper-with-52-panels/1126)
**Author:** [@marcmerlin](https://rpi-rgb-led-matrix.discourse.group/u/marcmerlin)\ **Replies:** 0\ **Last updated:** [October 8, 2025, 5:07am UTC](https://rpi-rgb-led-matrix.discourse.group/t/updated-documentation-to-show-double-width-vmapper-with-52-panels/1126 "2025-10-08T05:07:32Z")
Please see the updated I wrote this to show how to handle a 52 panel display wired this way --- ## [Run python file on startup](https://rpi-rgb-led-matrix.discourse.group/t/run-python-file-on-startup/1118)
**Author:** [@Yvonne](https://rpi-rgb-led-matrix.discourse.group/u/Yvonne)\ **Replies:** 4\ **Last updated:** [September 17, 2025, 2:47pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/run-python-file-on-startup/1118 "2025-09-17T14:47:46Z")
Hello, I have a rpi-rgb- led matrix 16 rows and 32 cols. I wrote a Python file in order to run my own text which changes every minute. I wrote the following code in rc.local: #!/bin/shpio -e \_IP=$(hostname -I) || tr… --- ## [32×64 HUB75 panel stays off or shows scrambled output with Adafruit HAT (SM16380SC)](https://rpi-rgb-led-matrix.discourse.group/t/32x64-hub75-panel-stays-off-or-shows-scrambled-output-with-adafruit-hat-sm16380sc/1121)
**Author:** [@Vis](https://rpi-rgb-led-matrix.discourse.group/u/Vis)\ **Replies:** 2\ **Last updated:** [September 16, 2025, 9:07pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/32x64-hub75-panel-stays-off-or-shows-scrambled-output-with-adafruit-hat-sm16380sc/1121 "2025-09-16T21:07:44Z")
Hardware Setup Raspberry Pi 3B+ Adafruit RGB Matrix + Real Time Clock HAT HUB75 32×64 LED panel (non-standard, mixed-chip variant) Ribbon cable (HAT → panel) Power: LRS-100-5 Meanwell feeding the HAT, Pi powered through… --- ## [P7.62-32\*32-A panel Assistance](https://rpi-rgb-led-matrix.discourse.group/t/p7-62-32-32-a-panel-assistance/1120)
**Author:** [@pworddestroyer](https://rpi-rgb-led-matrix.discourse.group/u/pworddestroyer)\ **Replies:** 5\ **Last updated:** [September 15, 2025, 3:54pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/p7-62-32-32-a-panel-assistance/1120 "2025-09-15T15:54:41Z")
Bought a sign that was controlled with a IR remote and decided to replace with a pi for wifi control but haven’t figured out the correct settings. Setup: Raspberry Pi 3 with 64 bit debian bookworm Adafruit bonnet unmo… --- ## [Creating my own program with makefile](https://rpi-rgb-led-matrix.discourse.group/t/creating-my-own-program-with-makefile/1117)
**Author:** [@Chris11jed](https://rpi-rgb-led-matrix.discourse.group/u/Chris11jed)\ **Replies:** 2\ **Last updated:** [August 19, 2025, 6:43am UTC](https://rpi-rgb-led-matrix.discourse.group/t/creating-my-own-program-with-makefile/1117 "2025-08-19T06:43:26Z")
Am a newbie, learning to use this fantastic library in my own test program. And would like some help, please? What I’ve done so far: I use a Raspberry Pi 4B, with DietPi. Have Waveshare 64x32 RGB panels; Chain=3, Para… --- ## [Help make this do anything!](https://rpi-rgb-led-matrix.discourse.group/t/help-make-this-do-anything/1115)
**Author:** [@kickercompkid](https://rpi-rgb-led-matrix.discourse.group/u/kickercompkid)\ **Replies:** 2\ **Last updated:** [August 18, 2025, 1:45pm UTC](https://rpi-rgb-led-matrix.discourse.group/t/help-make-this-do-anything/1115 "2025-08-18T13:45:55Z")
First timer here and stumbled upon the group. I came into ownership of an entire matrix wall. I’m talking like sports arena screen sized wall. The problem is that it did not come with the “magic box” to make everything w… [Previous page](https://rpi-rgb-led-matrix.discourse.group/c/uncategorized/1.md?page=1) [Next page](https://rpi-rgb-led-matrix.discourse.group/c/uncategorized/1.md?page=3)