CommentStreams:67fecdd95ea8c152b1b7a5d694759e5c

pi@RasPi4:~/x729-script $ sudo python3 sample/read_fan_speed.py

Traceback (most recent call last): 
   File "/home/pi/x729-script/sample/read_fan_speed.py", line 28, in <module> 
       GPIO.add_event_detect(TACH, GPIO.FALLING, fell)

RuntimeError: Failed to add edge detection