It is kind like the 1-wire of Dallas devices. They are active low with pull up resistors, so that collisions can be avoided.
Ioannis
|
It is kind like the 1-wire of Dallas devices. They are active low with pull up resistors, so that collisions can be avoided.
Ioannis
|
Actually, I had to use 10K resistor to GND.
Without it, PIR's internal resistor is not good enough (at least for my circuit), and pin takes a free walk.
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