64x64 Panels not working right (split image)

[smcneece]

Hello all, thanks for any tips you can give me I have been trying all kinds of things I've read on here to get these to run any of the demos properly. I've tried tons of combinations of command lines.

Ran the python script in one of the other threads, and still no luck.

The panels I bought are these: https://www.aliexpress.com/item/P2-5-Indoor-high-definition-led-display-Module-SMD-3-in-1-RGB-full-color-led/32816409052.html?spm=a2g0s.9042311.0.0.451f4c4dMznBY8

The CLI Command: sudo ./demo -D 0 -t 12 --led-rows=64 --led-cols=64

As mentioned I have tried many other command options, but willing to try more, this is by far the best image of them all with the simplest command.

What I get looks like:

The back of the panel looks like:

Greatly appreciate any help!

[glindner]

I am having the same issue as well. I got my panel from Adafruit and it looks identical! I may have to get future once from Aliexpress as well and save 70%!

Anyways, like I said I've got the same thing happening and can't determine the reason why either.

I have the PWM jumper in place and identified the adafruit-hat-pwm option as well.

[glindner]

Looks like you are using the same RGB Matrix Bonnet that I am, and I have the solution (well, Adafruit does):

Look at Step 3 referring to 64x64 displays - https://learn.adafruit.com/adafruit-rgb-matrix-bonnet-for-raspberry-pi/driving-matrices

Need to put a blob of solder for gpio pin 8 to map it to signal E as shown in the following picture - don't solder all 3 pads - just the middle and pin 8! -

Some matrixes need to use pin 16 for signal E, but I don't know anything about that.

[smcneece]

Thanks for the reply! Do you also still have to jumper pins 4 & 18 per their article? (Is that what you mean by the PWM?) I really am a noob when it comes to electronics, trying to learn as I go.

https://learn.adafruit.com/motion-controlled-matrix-bed-clock/circuit-diagram

[glindner]

Yes, I do have the 4-18 jumper in place as well.

Good luck! George

[BENETNATH]

Hello, i have a quite similar issue with 64x64 panels from china + one active-3-like board split image with the same command. i've done the two bridges mentioned on https://github.com/hzeller/rpi-rgb-led-matrix/tree/master/adapter/active-3 (not clean but tested and ok), but that did not solve the issue. Am i missing something? pictures here : https://photos.app.goo.gl/NUk7ZwH2vrViFyTH6

from what i read on the panel, E is on pin 8, do i need additional tweaking? Thanks for your GREAT project.

EDIT: shall i do the GPIO 4 to GPIO 18 link too with the active3 board ?

[BENETNATH]

Anybody has the same issue with this kind of panel? Can someone confirm that these panels should work ??

[glindner]

Benetnath, I do have a suggestion. Your pictures actually show E - GND (left jumper) and P4 - GND (right jumper). The board you are using has the hole references in a different order compared to the document you reference (active-3). I would unsolder the left jumper and place the jumper from the top hole (P8) to the bottom hole (E). I believe you need the E-Line to go to Pin 8.

Give that a try and let us know if that helps!

[BENETNATH]

That did the trick !! Thanks a lot for your help

[OllmGrb]

Hello,

I have an led matrix display which i got off ali express, p2.5 to be exact. I am supplying it with 5v and up to 16 amps of current, hence power shouldnt be an issue. However, I get no response from the screen when supply is connected. voltages directly on the panel are ok, and have tried with 5 different screens, all with no luck. Are the displays supposed to give any indication when supply is connected?

Thanks

[rahulpunk]

problem is a,b,c,d,e, 5 bit adress