Home Automation with ESP32 Vocabulary

Word Bank

Fill In the Blanks

1. A is a tiny computer on a single chip that runs one program.
2. The is the microcontroller we use in this workshop.
3. A lets you build a circuit by pushing parts in — no soldering.
4. A measures something about the world, like temperature or humidity.
5. The sensor reads temperature and humidity.
6. A limits current so an LED isn’t damaged.
7. rapidly switches a pin on and off to mix LED colors.
8. The window shows text the ESP32 prints over USB.

Quick Checks

• Circle the pin that powers the DHT22 in this project:
  5V / 3V3 / GND

• Circle the LED type we use:
  common cathode / common anode / single color

• The bare DHT22 needs an extra resistor on its DATA line. Its value is:
  220 Ω / 10 kΩ / 100 Ω

• True or False:
  • The ESP32 has WiFi built in:
  • Breathing on the sensor raises the humidity reading:
  • GPIO pins on the ESP32 are safe to feed 5 V into:
• Match the wire color to its job:
  • Power rail (+):
  • Ground rail (−):