Hi,

When using a Raspberry Pi 5 and PiEEG and running the script 'python 1.8_ch_Pi5_gpiod_1_5_4.py https://github.com/pieeg-club/PiEEG/blob/main/1.GUI/1.8_ch_Pi5_gpiod_1_5_4.py
Could you please offer some debugging suggestions？

1. The following exception occurred.

Traceback (most recent call last):
File "/home/zhangxing/Documents/my-pieeg-app-1/1.8_ch_Pi5_gpiod_1_5_4.py", line 9, in
chip = gpiod.chip("/dev/gpiochip4") #chip = gpiod.chip("/dev/gpiochip0")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/zhangxing/Documents/my-pieeg-app-1/venv/lib/python3.11/site-packages/gpiod/libgpiodcxx/init.py", line 105, in init
self.open(device, how)
File "/home/zhangxing/Documents/my-pieeg-app-1/venv/lib/python3.11/site-packages/gpiod/libgpiodcxx/init.py", line 132, in open
chip_struct = func(device)
^^^^^^^^^^^^
File "/home/zhangxing/Documents/my-pieeg-app-1/venv/lib/python3.11/site-packages/gpiod/libgpiod/init.py", line 1098, in gpiod_chip_open_lookup
chip = gpiod_chip_open_by_label(descr)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/zhangxing/Documents/my-pieeg-app-1/venv/lib/python3.11/site-packages/gpiod/libgpiod/init.py", line 1065, in gpiod_chip_open_by_label
chip_iter = iter(gpiod_chip_iter())
^^^^^^^^^^^^^^^^^^^^^^^
TypeError: iter() returned non-iterator of type 'NoneType'

2. The output of the 'pip list' command is as follows：

asttokens 3.0.0
colorzero 2.0
contourpy 1.3.1
cycler 0.12.1
decorator 5.1.1
executing 2.2.0
fonttools 4.55.5
gpiod 1.5.4
ipython 8.31.0
jedi 0.19.2
kiwisolver 1.4.8
matplotlib 3.10.0
matplotlib-inline 0.1.7
numpy 2.2.2
packaging 24.2
parso 0.8.4
pexpect 4.9.0
pillow 11.1.0
pip 23.0.1
prompt_toolkit 3.0.50
ptyprocess 0.7.0
pure_eval 0.2.3
Pygments 2.19.1
pyparsing 3.2.1
python-dateutil 2.9.0.post0
RPi.GPIO 0.7.1
scipy 1.15.1
setuptools 66.1.1
six 1.17.0
spidev 3.6
stack-data 0.6.3
traitlets 5.14.3
typing_extensions 4.12.2
wcwidth 0.2.13

3 gpiodetect

gpiochip0 [pinctrl-rp1] (54 lines)
gpiochip10 [gpio-brcmstb@107d508500] (32 lines)
gpiochip11 [gpio-brcmstb@107d508520] (4 lines)
gpiochip12 [gpio-brcmstb@107d517c00] (17 lines)
gpiochip13 [gpio-brcmstb@107d517c20] (6 lines)
gpiochip0 [pinctrl-rp1] (54 lines)