Keyestudio ESP32 Manual page 110

ESP32 Starter Kit
3. Wiring Diagram
4. Test Code
From the working principle, we can read the level of the sensor pin to judge whether there are people nearby.
/*
keyestudio ESP32 Inventor Learning Kit
Project 17.1 Invasion Alarm
http://www.keyestudio.com
*/
int
pir = 5; //Define IO5 as PIR sensor pin
void
setup() {
pinMode(pir,INPUT);
Serial.begin(9600);
}
void loop() {
int pir_val = digitalRead(pir);
Serial.print("pir_val:");
Serial.println(pir_val);
delay(500);
106
//Set IO5 pin to input
//Read the PIR result and assign it to pir_val
//Print "pir_val"
(continues on next page)
Chapter 8. Arduino Tutorial