SunFounder ESP32 Starter Kit
1.21 5.5 Detect Human Movement
Passive infrared sensor (PIR sensor) is a common sensor that can measure infrared (IR) light emitted by objects in its
field of view. Simply put, it will receive infrared radiation emitted from the body, thereby detecting the movement of
people and other animals. More specifically, it tells the main control board that someone has entered your room.
Required Components
In this project, we need the following components.
It’s definitely convenient to buy a whole kit, here’s the link:
Name ITEMS IN THIS KIT LINK
ESP32 Starter Kit 320+
You can also buy them separately from the links below.
COMPONENT INTRODUCTION PURCHASE LINK
ESP32 WROOM 32E
ESP32 Camera Extension -
Breadboard
Jumper Wires
Resistor
LED
PIR Motion Sensor Module
Available Pins
• Available Pins
Here is a list of available pins on the ESP32 board for this project.
For Input IO13, IO14, IO27, IO26, IO25, IO33, I35, I34, I39, I36, IO4, IO18, IO19,
IO21, IO22, IO23
For Output IO13, IO12, IO14, IO27, IO26, IO25, IO33, IO32, IO15, IO2, IO0, IO4, IO5,
IO18, IO19, IO21, IO22, IO23
Note: IO32 cannot be used as input pin in this project because it is internally connected to a 1K pull-down resistor,
which sets its default value to 0.
• Strapping Pins (Input)
Strapping pins are a special set of pins that are used to determine specific boot modes during device
startup (i.e., power-on reset).
Strapping Pins IO5, IO0, IO2, IO12, IO15
74 Chapter 1. For Arduino User
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