2 pixels light on, instead of 1

[olmichal]

Hello everyone!

I have a problem with the pixel display. When I use the SetPixel() function, the corresponding pixel is displayed and one on the right. For example: I set the SetPixel function SetPixel(1,1,255,255,255) and the matrix displays pixel [1] [1] and [2] [1] in white. Or in the rectangle example, there are 11 columns instead of 10.

Here is my code: test1.txt

#!/usr/bin/env python3

import time
import sys

from rgbmatrix import RGBMatrix, RGBMatrixOptions

options = RGBMatrixOptions()
options.rows = 16
options.cols = 32
options.chain_length = 1
options.parallel = 1
options.hardware_mapping = 'regular'

matrix = RGBMatrix(options=options)

for i in range(1,11):
    for j in range(1,11):
        matrix.SetPixel(i,j,0,0,255)

try:
    print("Press CTRL+C to stop.")
    while True:
        time.sleep(100)
except KeyboardInterrupt:
    sys.exit(0)

I cloned the repo: git clone https://github.com/hzeller/rpi-rgb-led-matrix

I have also installed some dependencies: sudo apt-get update && sudo apt-get install -y git python3-dev python3-pillow

I used those commands in the repo folder: make build-python PYTHON=$(which python3) sudo make install-python PYTHON=$(which python3)

I have made my code executable: chmod +x test1.py sudo ./test1.py

Here is how I have done the wiring:	Connection	Pin	Pin	Connection
-	1	2	-
-	3	4	-
-	5	6	GND
STB	7	8	-
-	9	10	-
CLK	11	12	OE
G1	13	14	-
A	15	16	B
-	17	18	C
B2	19	20	-
G2	21	22	NC
R1	23	24	R2
-	25	26	B1

I also set isolcpus=3 in cmdline.txt and dtparam=audio=off in config.txt. I am using Raspberry Pi 3B and 5V/2A Power Supply for the Matrix.

Is there anything I can do to fix this?

EDIT: It happens only on the left side of the panel

[MichalLinde]

I have the exactly same problem