Learn by doing
ESP32 Learning Guides
Start with Mission Journeys — fun step-by-step builds for kids and beginners. Reference Guides are here when you want extra background.
Mission Journeys
16 hands-on missions with stories, safety tips, wiring, code, and practical challenges — start here if you're new.
Blink an LED with ESP32
Your first real ESP32 project — one LED, a few wires, and code you write yourself. Let's make it blink!
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Button Controls LED with ESP32
Make your ESP32 react to your hand. In this mission a push button becomes an input, an LED becomes the output, and yo…
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Read Temperature with DHT22
Build a real ESP32 room sensor with the DHT22. You will wire power, ground, and one data pin, then read temperature a…
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Connect OLED Display with ESP32
Serial Monitor is great for debugging — but a real screen on your project looks amazing. This mission adds a tiny OLE…
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Understanding Digital Inputs and Floating Pins
Your button worked in Mission 02. Now you will learn the electronics behind it: why an input pin needs a clear HIGH o…
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Pull-up vs Pull-down Resistors
You saw in Mission 03 that a floating input can behave randomly. Now you will learn the two simple resistor patterns…
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Button Debouncing
Your button now has a stable default state. The next problem is speed: the ESP32 can see tiny mechanical bounces that…
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Multiple Buttons & State Detection
One debounced button is useful. Real projects often need several buttons, and each one needs its own clean state, tim…
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PWM Fundamentals
Digital pins can switch fully ON or fully OFF. PWM teaches the ESP32 to create useful in-between effects such as dim…
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Analog Inputs
Buttons teach the ESP32 yes or no. Analog inputs teach it how much: how bright, how loud, how wet, how far, or where…
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Analog Inputs: Reading the Real World
Buttons teach the ESP32 yes or no. Analog inputs teach it how much: how bright, how loud, how wet, how far, or where…
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OLED Display with ESP32
This ESP32 OLED display tutorial shows how to wire an SSD1306 screen to GPIO21 and GPIO22, upload Arduino code, and s…
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Reading Analog Sensors
A potentiometer is a dial you control by hand. Analog sensors use the same ADC idea, but the real world turns the dia…
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I2C Communication
I2C is the reason one ESP32 can talk to a display, a sensor, and other smart modules using the same two signal wires.
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Reading Environmental Sensors
Embedded systems become useful when they observe the physical world. In this mission, your ESP32 reads air conditions…
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Smart Environment Monitor
This final Foundation mission combines sensors, displays, buttons, GPIO, decisions, and debugging into one complete e…
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2 background articles for deeper reading after your first missions.
Reference GuideBeginnerWhat Is ESP32? Complete Beginner's Guide
ESP32 is a low-cost, Wi-Fi and Bluetooth capable microcontroller that lets you build connected sensors, automation, and IoT devices without a separate comput…
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Reference GuideBeginnerInstalling Arduino IDE for ESP32: Complete Setup Guide
Before you wire sensors or publish Wi-Fi dashboards, your computer must recognize the ESP32 DevKit and compile firmware with the correct board package. This…
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