I’m connecting a NO reed sensor to 3.3v and GPIO17. In my code I defined GPIO17 as input and set the internal resistor to pulldown.
When the door is closed, GPIO 17 reads 1 and 0 when the door is open.
The code works flawless and does what I want it to do, but since the door is closed 99% of the time I’m concerned about safety and power draw.
Is this circuit safe, or is there a risk of damaging the pi? Since there is not any resistor in the circuit, how much power does it draw?