I'm trying to figure out why a LED I connected to GPIO #15 and GND on an Adafruit's ESP32 board is turning on (but dimmed) when I launch the deepsleep() mode via machine.deepsleep() (board running on MicroPython).
The LED pin is instantiated in the code like this: MY_LED = Pin(15, Pin.OUT)
The last operation done on the pin is pin.value(0).
Here's a partial circuit diagram:
Has anyone seen such a thing? Why does it turn on when it's off right before the machine.deepsleep() command line?
Best Answer
As pointed out in the comments, the issue was coming from a "weak pull-down syndrome": I simply changed the pin declaration to
MY_LED = Pin(15, Pin.OUT, Pin.PULL_DOWN)and the problem went away.