ESP32 with 32x64 LED Matrix Issues

[acktarus]

I have a weird issue with a LED Matrix project I am working on. I was able to build a "test" project and the LED Matrix is driven perfectly. Then I added Blynk.Edgent in the mix (Wifi connection) and now there is interference on the screen. See Video. I really don't know how to get rid of this interference.

The ESP is a ESP-WROOM-32 and the LED Display is P2.5-16S-V1.0

Pinout is as following:

#define R1_PIN_DEFAULT 25
#define G1_PIN_DEFAULT 26
#define B1_PIN_DEFAULT 27
#define R2_PIN_DEFAULT 14
#define G2_PIN_DEFAULT 12
#define B2_PIN_DEFAULT 13
#define A_PIN_DEFAULT 23
#define B_PIN_DEFAULT 19
#define C_PIN_DEFAULT 5
#define D_PIN_DEFAULT 17
#define E_PIN_DEFAULT -1 // IMPORTANT: Change to a valid pin if using a 64x64px panel.
#define LAT_PIN_DEFAULT 4
#define OE_PIN_DEFAULT 15
#define CLK_PIN_DEFAULT 16

Here is a Video of the issue
Video

[mrcodetastic]

Are you printing stuff to serial output? This can cause issues.

Also, don't have cables any longer than 10cm.

[acktarus]

I am indeed printing stuff to serial output (I will comment them out and see if this fixes my problem). I am using the cable that came with the screen (I will also shorten it... but I know it didn't cause an issue when the blynk.edgent part of my code was not used)

[mrcodetastic]

Comment out the serial stuff first. That might fix it.

Use a gpio that's further away from tx,rx pins

[acktarus]

I traced my problem to PIN 25 of my ESP32. When I disconnect the R1 from PIN 25, the interference goes away.

But I can't seem to be able to move the GPIO to a different pin. Maybe I am using the wrong #Define command in my program. I am using "#define R1_PIN_DEFAULT 25"

I have change that number to 34 or 33 and moved my wire with no luck (the red on the top quadrant is not displaying properly

Am I missing something?

[mrcodetastic]

Look at the examples on how to change mapping with mxconfig variable