Sugar PIR Sensor
Detects the movement of people or animals, and changes the digital level when triggered.
It can be simply understood that the PIR sensor is a special type of "button" whose trigger condition is the presence of a living creature moving in front of it.
Parameters
| Size | 24 x 24 x 19 mm |
|---|---|
| Weight | 5.6 g |
| Signal | Digital Input (with blue indicator light) 1 (High level): Detects someone approaching 0 (Low level): No person detected |
| Range | 5m |
Wiring
Connect using a 3-pin terminal cable to P1 on the Robotbit Edu.
(Any of the eight white terminals can be used for connection. Note that the actual wiring must correspond to the program written.)
After turning on the Robotbit power, you can see the red light at the bottom of the LED module illuminate (indicating the module is powered normally).
Programming
Implement sound alert when human motion is detected by Micro:bit
The working status of the PIR sensor (motion sensor) is indicated by a blue LED indicator.
The PIR sensor has a 3-second lockout period. When human motion is detected, it maintains the triggered state for 3 seconds before returning to its normal state.
#PIR Alarm System
When someone passes by the PIR sensor, the Micro:bit is triggered to emit a sound.
The Digital Read block must be used, and the pull-up/pull-down resistor must be initialized during setup. Otherwise, detection may be abnormal.
