Keyestudio KS0436 Kit Manual page 224

224
PIR sensor.
If the LCD shows "Somebody is in this area!" and LED lights up, it is
reminding of you that somebody is here.
Otherwise, it will tell you by displaying "No one!"on LCD and LED off.
Troubleshooting:
 LED Not Lighting?
Double-check that you have plugged them in correctly. Make sure the
connection no wrong.