I have a question about GPIO of Jetson Xavier.
I wanted to make a Python program like “when an input is detected on 15pin, another process runs,” but the problems below occurred.
Once voltage is applied, voltage remains high.
A small noise like touching by a finger applies voltage, and a Python program detects it as an input.
Could you tell me these are specification defects or Xavier’s defects which I used by chance? And are similar cases reported?
You need a pulldown resistor on the pin for it to go low after voltage is disconnected. CMOS inputs (MOSFET gates) are capacitors, and stay “on” if they aren’t explicitly discharged.