nodemcu-motion_detector's Introduction

Notes on HC-SR501 PIR motion sensor

Sample Code

motion.lua

Connect output of sensor to D6. If sensor is in 'hold HIGH' mode, a line will be logged while motion is being detected. If sensor is in 'motion event' mode, a line will be logged for every motion event.

Specs

power: 5v
jumper on middle and inside: holds output pin HIGH when motion detected.
jumper on outside and middle: output is raised HIGH once / "motion event". No motion for X interval ends a motion event.
with jumper on the left, left-most dial is sensitivity (3m-7m), right dial is 'time delay before triggering' (300ms - 5s).

Notes

attempting to run off < 5v results in the output flapping. HC-SR501 includes a 5v -> 3v regulator that could be bypassed if 3.3v supply is required.

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nodemcu-motion_detector's Issues

sensor will send a signal With or without movement

connections:
pir501 VCC-vin(5v) nodemcu
pir501 OUT-D4 nodemcu
pir501 GND-GND nodemcu

console print out:
ESP8266 Started
Compile File:motion_test.lua
Remove File:motion_test.lua

Motion detected!
[DEBUG] start: 5, last: 0, break: 5
motion ended after 4 seconds.
[DEBUG] start: 5, duration: 4
Motion detected!
[DEBUG] start: 14, last: 9, break: 5
motion ended after 4 seconds.
[DEBUG] start: 14, duration: 4
Motion detected!
[DEBUG] start: 24, last: 18, break: 6
motion ended after 5 seconds.
[DEBUG] start: 24, duration: 5
Motion detected!
[DEBUG] start: 34, last: 29, break: 5
motion ended after 5 seconds.
[DEBUG] start: 34, duration: 5
Motion detected!
[DEBUG] start: 44, last: 39, break: 5
motion ended after 5 seconds.
[DEBUG] start: 44, duration: 5
Motion detected!
[DEBUG] start: 55, last: 49, break: 6
motion ended after 4 seconds.
[DEBUG] start: 55, duration: 4
Motion detected!
[DEBUG] start: 65, last: 59, break: 6
motion ended after 5 seconds.
[DEBUG] start: 65, duration: 5
Motion detected!
[DEBUG] start: 76, last: 70, break: 6
motion ended after 4 seconds.
[DEBUG] start: 76, duration: 4
Motion detected!
[DEBUG] start: 86, last: 80, break: 6
motion ended after 5 seconds.
[DEBUG] start: 86, duration: 5
Motion detected!
[DEBUG] start: 96, last: 91, break: 5
motion ended after 5 seconds.
[DEBUG] start: 96, duration: 5
Motion detected!
[DEBUG] start: 108, last: 101, break: 7
motion ended after 4 seconds.
[DEBUG] start: 108, duration: 4
Motion detected!
[DEBUG] start: 117, last: 112, break: 5
motion ended after 6 seconds.
[DEBUG] start: 117, duration: 6
Motion detected!
[DEBUG] start: 129, last: 123, break: 6
motion ended after 3 seconds.
[DEBUG] start: 129, duration: 3
Motion detected!
[DEBUG] start: 138, last: 132, break: 6
motion ended after 5 seconds.
[DEBUG] start: 138, duration: 5
Motion detected!
[DEBUG] start: 148, last: 143, break: 5
motion ended after 5 seconds.
[DEBUG] start: 148, duration: 5
Motion detected!
[DEBUG] start: 159, last: 153, break: 6
motion ended after 4 seconds.
[DEBUG] start: 159, duration: 4
Motion detected!
[DEBUG] start: 169, last: 163, break: 6
motion ended after 4 seconds.
[DEBUG] start: 169, duration: 4
Motion detected!
[DEBUG] start: 181, last: 173, break: 8
motion ended after 4 seconds.
[DEBUG] start: 181, duration: 4
Motion detected!
[DEBUG] start: 190, last: 185, break: 5
motion ended after 6 seconds.
[DEBUG] start: 190, duration: 6
Motion detected!
[DEBUG] start: 201, last: 196, break: 5
motion ended after 4 seconds.
[DEBUG] start: 201, duration: 4
Motion detected!
[DEBUG] start: 211, last: 205, break: 6
[DEBUG] start: 169, last: 163, break: 6
motion ended after 4 seconds.
[DEBUG] start: 169, duration: 4

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