Hi everyone,
I’m trying to run the GPT script from the SunFounder documentation:
AI Interaction Using GPT-4O
I’m using a Raspberry Pi 5 (8GB), and other Python scripts are working fine.
I’ve successfully completed the “Installing Required Packages and Dependencies” section.
However, I’m stuck on step 4: Running the Example
Here’s what happens when I try to run the example:
bash
(my_venv) hayoon@hayoon:~/picar-x/my_venv $ cd ~/picar-x/gpt_examples/
(my_venv) hayoon@hayoon:~/picar-x/gpt_examples $ sudo ~/my_venv/bin/python3 gpt_car.py --keyboard
Traceback (most recent call last):
File "/home/hayoon/picar-x/gpt_examples/gpt_car.py", line 10, in <module>
from picarx import Picarx
File "/home/hayoon/my_venv/lib/python3.11/site-packages/picarx-2.0.5-py3.11.egg/picarx/__init__.py", line 2, in <module>
from .picarx import Picarx
File "/home/hayoon/my_venv/lib/python3.11/site-packages/picarx-2.0.5-py3.11.egg/picarx/picarx.py", line 1, in <module>
from robot_hat import Pin, ADC, PWM, Servo, fileDB
ModuleNotFoundError: No module named 'robot_hat'
It says the robot_hat module is not found.
How can I fix this?
Any help would be greatly appreciated!
Thanks in advance.
tried chat gpt to solve this problem. But failed. I don’t know anthying about programming.
Title: Can’t Load GPIO Pin Factory (robot_hat + gpiozero + virtualenv + PiCar-X + Raspberry Pi 5)
Hi everyone,
I’m trying to build a ChatGPT-powered voice robot using PiCar-X (Sunfounder) and a Raspberry Pi 5 with a virtual environment (venv). However, I’ve been struggling for days with GPIO access errors when using the picarx and robot_hat libraries, specifically around GPIO pin factory failures.
Here is a summary of my setup, the problem, and what I’ve tried so far.
Environment
- Raspberry Pi 5 (64-bit OS)
- Python 3.11
virtualenv located at ~/my_venv- Installed packages:
picarx, robot_hat, gpiozero, RPi.GPIO, pigpio, openai, speechrecognition
- Using
gpt_car.py (from Sunfounder’s GPT + PiCar-X sample)
The Problem
When I try to run:
bash
복사편집
sudo PYTHONPATH=/usr/local/lib/python3.11/dist-packages:$PYTHONPATH ~/my_venv/bin/python3 gpt_car.py
I get the following error:
plaintext
복사편집
gpiozero.exc.BadPinFactory: Unable to load any default pin factory!
RuntimeError: Unable to load any default pin factory!
In the logs, I see:
plaintext
복사편집
Falling back from pigpio: failed to connect to localhost:8888
Falling back from native: unable to determine gpio base
What I Have Tried So Far
- Installed
robot_hat system-wide using:
bash
복사편집
sudo python3 install.py
- Installed required libraries in the virtual environment:
bash
복사편집
pip install gpiozero RPi.GPIO pigpio
- Installed system-wide as well:
bash
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sudo pip3 install RPi.GPIO pigpio
- Confirmed that pigpiod is running:
bash
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sudo systemctl start pigpiod
sudo systemctl enable pigpiod
sudo pigpiod
Checked port 8888:
bash
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sudo lsof -i :8888
- Tried forcing
gpiozero to use different pin factories:
bash
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sudo GPIOZERO_PIN_FACTORY=rpigpio PYTHONPATH=... ~/my_venv/bin/python3 gpt_car.py
sudo GPIOZERO_PIN_FACTORY=pigpio PYTHONPATH=... ~/my_venv/bin/python3 gpt_car.py
- Also tried copying
robot_hat into the virtualenv site-packages directly.
- Verified
RPi.GPIO can be imported:
bash
복사편집
sudo python3 -c "import RPi.GPIO as GPIO; print(GPIO.VERSION)"
What I Want to Know
- Is there a clean way to get
robot_hat + gpiozero working inside a virtualenv, while still using sudo (for hardware access)?
- How do I correctly configure
gpiozero to use a specific pin factory in this environment?
- Am I missing a required configuration for Raspberry Pi 5 compatibility?
Any help or suggestions would be greatly appreciated 
Thanks in advance!
The issue occurs because your Python virtual environment doesn’t include system packages. Did you use the --system-site-packages flag when creating the virtual environment to include system packages? Please delete the current virtual environment and recreate it.AI Interaction Using GPT-4O — SunFounder PiCar-X Kit documentation