How to make it work for 96*48 1/24 scan rgb matrix

[VijayVinayaraj]

I bought a 96*48 P2.5 1/24 scan RGB matrix from Waveshare. Their official documentation suggests to use your library. But I couldn't find any documentation on support for 1/24 scan rate for matrix.
https://www.waveshare.com/wiki/RGB-Matrix-P2.5-96x48-F
This is the doc of Waveshare.

[board707]

Please indicate the partnumbers of the chips on the rear side

[VijayVinayaraj]

NCSD-p2.5-96*48(2121)-24S-V2.1
ICN203778p
SM5166PF
MW245B

[board707]

All drivers are standard. Scan 24 at height 48 - nothing special.
The panel should be supported by library.

[VijayVinayaraj]

This is what I get When I run this code . Every colour is divided like this.
Could you please help me with this?

#include <Arduino.h>
#include "ESP32-HUB75-MatrixPanel-I2S-DMA.h"

MatrixPanel_I2S_DMA *dma_display = nullptr;
uint16_t myRED = dma_display->color565(255, 0, 0);
uint16_t myGREEN = dma_display->color565(150, 150, 100);
uint16_t myBLUE = dma_display->color444(15, 0, 15);
void setup() {
  HUB75_I2S_CFG mxconfig(/* width = */ 96, /* height = */ 48, /* chain = */ 1);
mxconfig.gpio.e=32;
  dma_display = new MatrixPanel_I2S_DMA(mxconfig);
  dma_display->begin();
  dma_display->setBrightness8(80);
  dma_display->clearScreen();
  // `println` is only available when the Adafruit GFX library is used.

}
void loop(){
dma_display->fillScreen(myBLUE);
  delay(2000);
  dma_display->fillScreen(myRED);
  delay(2000);
  dma_display->fillScreen(myGREEN);
  delay(2000);
}

[VijayVinayaraj]

@board707 I found the issue in common issues page. I didn't see the page at first. The problem was GPIO pin for the address line. I changed the C,D pins from default pins to 21,19 respectively.

mxconfig.gpio.c = 21 ;
  mxconfig.gpio.d = 19;

This fixed the issue
Thank you for the help. I thought this library didn't support the panel as there was no mention of 1/24 scan rate or the panel was defective.

[mrcodetastic]

Any ideas why changing the pins fixes this issue?

[board707]

Judging by the picture, only one of the two pins did not work - most likely C. It is possible that the pin is poorly soldered on the ESP32 or an unstable connection in the wires. When @VijayVinayaraj changed the pin, the problem was gone

[board707]

As a test, OP can now try to return the default pins - by one at a time. First, change only D to the default one and try, and then only C. If in both cases the operation of the panel is not disrupted, switch both pins

[VijayVinayaraj]

Sure @board707, I will test that and get back to you.