Hello.
This is Pepper Papa from the Coding Rescue Team.
When practicing embedded systems, you often encounter situations where the same code works in one environment but not in another.
In such cases, it is better to check the following items before looking at the code.
- Whether the power and wiring are correct
- Whether the GPIO numbers are being used based on BCM
- Whether I2C / SPI / UART settings are enabled
- Whether the Python virtual environment and packages are properly installed
- Whether there are any device access permission issues
In embedded practice, you often get stuck due to power, wiring, settings, or permission issues rather than the code itself.
If a problem occurs, it is good to check them one by one in the following order:
Power → Wiring → Pin Number → Interface Settings → Permissions → Code.
If you get stuck during practice, feel free to leave a question at any time.
I can provide a more accurate answer if you include the error message, the command you executed, and the pin numbers you connected.
Thank you.
Sincerely, Coding Rescue TeamThân ái, Đội cứu hộ Corini.