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Clear guides, hands-on projects and practical knowledge to help you learn electronics and build with ESP32—even if you’re just getting started.

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Generated illustration of an ESP32, breadboard and OLED on a workbench; not verified wiring

Illustrative hardware · follow the tutorial for wiring

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Your ESP32 beginner journey

Follow these five steps, from first upload to your first display.

Parts, prerequisites and what you will learn

Follow this order with a classic ESP32 WROOM DevKit and Arduino-ESP32 3.x. Each guide explains its exact hardware assumptions. Finish each expected result before moving on.

Arduino IDE setup
Install the board package, select your board and port, then verify a Serial-only upload.
Parts: ESP32 DevKit, data-capable USB cable and computer.
Before you start: Start here; no circuit or onboard LED is required.
Blink LED
Wire an external LED and control a digital output.
Parts: Add an LED, 220 ohm resistor, breadboard and jumper wires.
Before you start: First confirm the Serial upload in step 1 works.
Button input
Read a button with INPUT_PULLUP and use it to control the LED.
Parts: Add a pushbutton; reuse the LED circuit and breadboard.
Before you start: First make the external LED blink in step 2.
DHT11 sensor
Install a sensor library and read temperature and humidity in Serial Monitor.
Parts: Add a DHT11; check the guide for bare-sensor versus module wiring and pull-up requirements.
Before you start: Keep the working upload setup and practise the button wiring before adding a sensor.
OLED display
Wire an SSD1306 I2C OLED and show text. Combining sensor values is a later exercise.
Parts: Add the guide’s 128×64 SSD1306 I2C OLED; verify its supply and signal requirements.
Before you start: Use the library-installation and Serial Monitor skills from step 4.

New to the board? Read What is ESP32?. For an ordered path, explore ESP32 basics.

Featured projects

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Put your new skills to work with a useful next build.

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Illustrative weather display concept; the linked build uses an SSD1306 OLED and BME280

Weather Clock

Show local time and BME280 readings on an OLED, with Wi-Fi time synchronization.

Generated illustration of an LED matrix; use the tutorial for MAX7219 wiring

LED Matrix

Scroll a message on a MAX7219 matrix, with power, logic buffering and library setup.

Generated concept illustration of an ESP32 robot and phone direction controls, not a tested build

Wi-Fi Robot Control

Send local browser commands to an ESP32 robot through a motor driver.

Generated project visuals are illustrative, not wiring instructions or evidence of tested builds.

Need a suggestion? Open the project finder

Project finder

Find a project for your next skill

Choose your interests for a three-project progression, from a first build to a further challenge.

Who is building?

What do you want to do?

Best First

ESP32 Learning Trainer Board

Classroom ESP32 trainer with a push button on GPIO12 and status LED on GPIO14.

Beginner45-60 minAges 10+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 Distance Monitoring System

Build an ESP32 HC-SR04 distance monitor with TRIG GPIO5, ECHO GPIO18 through a 10 kOhm / 20 kOhm divider, 5 V sensor…

Beginner60-75 minAges 11+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Advanced Upgrade

ESP32 OLED Weather Clock: BME280, Wi-Fi and Local Time

Build an ESP32 SSD1306 weather clock with BME280 readings, NTP time, timezone rules and Wi-Fi recovery.

Beginner90-150 minAges 12+

Wire an SSD1306 OLED and BME280 sensor on the ESP32 I2C pins.Match SDA and SCL wiring to Wire.begin(21, 22) in the sketch.Connect ESP32 Wi-Fi and sync time from NTP.Configure POSIX timezone rules for local time.

All recommendations

Student: First ESP32 Project

Best First

ESP32 Learning Trainer Board

Classroom ESP32 trainer with a push button on GPIO12 and status LED on GPIO14.

Beginner45-60 minAges 10+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 Distance Monitoring System

Build an ESP32 HC-SR04 distance monitor with TRIG GPIO5, ECHO GPIO18 through a 10 kOhm / 20 kOhm divider, 5 V sensor…

Beginner60-75 minAges 11+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Advanced Upgrade

ESP32 OLED Weather Clock: BME280, Wi-Fi and Local Time

Build an ESP32 SSD1306 weather clock with BME280 readings, NTP time, timezone rules and Wi-Fi recovery.

Beginner90-150 minAges 12+

Wire an SSD1306 OLED and BME280 sensor on the ESP32 I2C pins.Match SDA and SCL wiring to Wire.begin(21, 22) in the sketch.Connect ESP32 Wi-Fi and sync time from NTP.Configure POSIX timezone rules for local time.

Student: Sensors and Data

Best First

ESP32 Distance Monitoring System

Build an ESP32 HC-SR04 distance monitor with TRIG GPIO5, ECHO GPIO18 through a 10 kOhm / 20 kOhm divider, 5 V sensor…

Beginner60-75 minAges 11+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 Soil Moisture Monitor

A plant monitor that reads a capacitive soil sensor, converts raw ADC values into a moisture percentage, and uses LED…

Beginner60-90 minAges 12+

Read an analog soil moisture sensor with an ESP32 ADC pin.Calibrate dry and wet readings for your own sensor and soil.Convert raw ADC values into a useful percentage.Use LEDs or a buzzer as clear status outputs.

Advanced Upgrade

ESP32 IoT Weather Station: BME280 Arduino Code

Build an ESP32 BME280 weather station with I2C wiring on GPIO21/GPIO22, 3.3 V power, Arduino code, Serial Monitor out…

Beginner60-90 minAges 12+

Wire a BME280 sensor over I2C using common Arduino-ESP32 GPIO21/GPIO22 defaults.Detect whether the BME280 responds at 0x76 or 0x77.Read temperature, humidity, and pressure and print clear labeled Serial Monitor values.Interpret local pressure in hPa without confusing it with sea-level adjusted weather reports.

Student: Smart Home and IoT

Best First

ESP32 Water Leak Detector

Build an ESP32 water leak detector with resistive water sensor AOUT GPIO34, DOUT GPIO35, buzzer GPIO25, wet/dry thres…

Beginner50-80 minAges 12+

Detect water using analog and digital sensor outputs.Understand why resistive water probes corrode over time.Create a safe local buzzer/LED alarm.Choose sensor placement for real leaks.

Next Challenge

ESP32 Smart Irrigation System

Build a calibrated ESP32 soil-moisture controller with a documented active-HIGH relay, low-voltage pump wiring, hyste…

Beginner90-150 minAges 12+

Wire and test the soil moisture probe before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control relay-controlled pump using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Advanced Upgrade

ESP32 MQTT DHT22 Sensor Publisher

Publish DHT22 readings to a local MQTT broker, subscribe to a sample command, use unique client IDs and diagnose reco…

Intermediate90-120 minAges 12+

Wire and read a DHT22 sensor.Connect ESP32 to Wi-Fi safely in Arduino code.Publish readings to an MQTT topic.Understand broker, publisher, subscriber, and topic names.

Student: Robotics and Motion

Best First

ESP32 Line Following Robot

Build an ESP32 line following robot with two IR sensors, motor driver wiring, sensor calibration, steering logic, tro…

Intermediate90-150 minAges 12+

Wire analog IR sensor outputs to GPIO34 and GPIO35 and print raw ADC readings.Calibrate separate left and right thresholds from the actual track surface.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control a dual H-bridge motor driver on GPIO16-GPIO19 using simple two-sensor steering logic.

Next Challenge

ESP32 WiFi Robot Controller

Build a browser-controlled ESP32 robot that drives motors from Wi-Fi commands served by the board itself.

Intermediate90-150 minAges 12+

Wire and test the web control commands before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control dual motor driver using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Advanced Upgrade

ESP32 Educational Servo Arm Controller (3-DOF)

Build a small joystick-controlled 3-DOF servo arm on ESP32 with safe angle limits, incremental motion, and separate s…

Intermediate90-120 minAges 13+

Servo PWMJoystick ADCAngle constraintsSeparate power domains

Student: Cameras and Computer Vision

Best First

ESP32 Camera Capture Server

Build an ESP32-CAM capture server with AI-Thinker OV2640 pin mapping, FTDI upload wiring, stable 5 V power, local /ca…

Intermediate90-120 minAges 12+

Program an ESP32-CAM safely with an FTDI adapter.Understand boot mode using IO0.Capture a camera frame and serve or store it.Recognize power-related camera failures.

Next Challenge

ESP32-CAM QR Code Scanner

Build an ESP32-CAM QR code scanner with AI-Thinker wiring, OV2640 grayscale capture, on-device Quirc decoding, Serial…

Intermediate90-130 minAges 12+

Program and boot an ESP32-CAM correctly.Capture frames suitable for QR decoding.Understand why lighting and focus affect recognition.Print decoded text to Serial Monitor.

Advanced Upgrade

Build an ESP32-CAM Face Detection Privacy Demo

Build a local ESP32-CAM face detection demo that distinguishes detection from recognition, with privacy, lighting, me…

Advanced90-120 minAges 14+

ESP32-CAM pin mapLocal Wi-Fi cameraFace detection limitsPrivacy consent

Student: AI and Advanced Builds

Best First

Build an APDS-9960 Gesture Control Demo

Build a technically honest ESP32 gesture demo with APDS-9960 I2C wiring, interrupt handling, LED outputs, and false-t…

Intermediate60-75 minAges 12+

I2C wiringInterrupt inputLED outputsSensor limitations

Next Challenge

ESP32-CAM Color Object Detector Demo

Build an ESP32-CAM color object detector demo with AI-Thinker OV2640 wiring, RGB565 thresholding on the ESP32, LED ou…

Intermediate90-120 minAges 13+

ESP32-CAM setupRGB565 pixelsThreshold tuningAI claim limits

Advanced Upgrade

ESP32 Low-Voltage Energy Meter Demo

Build a low-voltage ESP32 energy-measurement demonstration using ADC readings and relative power calculations.

Intermediate90-120 minAges 13+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Parent: First ESP32 Project

Best First

ESP32 Learning Trainer Board

Classroom ESP32 trainer with a push button on GPIO12 and status LED on GPIO14.

Beginner45-60 minAges 10+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 Water Leak Detector

Build an ESP32 water leak detector with resistive water sensor AOUT GPIO34, DOUT GPIO35, buzzer GPIO25, wet/dry thres…

Beginner50-80 minAges 12+

Detect water using analog and digital sensor outputs.Understand why resistive water probes corrode over time.Create a safe local buzzer/LED alarm.Choose sensor placement for real leaks.

Advanced Upgrade

ESP32 Distance Monitoring System

Build an ESP32 HC-SR04 distance monitor with TRIG GPIO5, ECHO GPIO18 through a 10 kOhm / 20 kOhm divider, 5 V sensor…

Beginner60-75 minAges 11+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Parent: Sensors and Data

Best First

ESP32 Soil Moisture Monitor

A plant monitor that reads a capacitive soil sensor, converts raw ADC values into a moisture percentage, and uses LED…

Beginner60-90 minAges 12+

Read an analog soil moisture sensor with an ESP32 ADC pin.Calibrate dry and wet readings for your own sensor and soil.Convert raw ADC values into a useful percentage.Use LEDs or a buzzer as clear status outputs.

Next Challenge

ESP32 OLED Weather Clock: BME280, Wi-Fi and Local Time

Build an ESP32 SSD1306 weather clock with BME280 readings, NTP time, timezone rules and Wi-Fi recovery.

Beginner90-150 minAges 12+

Wire an SSD1306 OLED and BME280 sensor on the ESP32 I2C pins.Match SDA and SCL wiring to Wire.begin(21, 22) in the sketch.Connect ESP32 Wi-Fi and sync time from NTP.Configure POSIX timezone rules for local time.

Advanced Upgrade

ESP32 Air Quality Monitor

Build an ESP32 MQ135 air quality monitor with GPIO34 analog readings, warm-up and baseline testing, GPIO26 fan or rel…

Beginner75-100 minAges 12+

Read a gas sensor as an analog input.Create a fresh-air baseline before choosing an alert threshold.Drive a relay or fan control signal safely from an ESP32 GPIO.Understand why gas sensors need warm-up and calibration.

Parent: Smart Home and IoT

Best First

ESP32 Water Leak Detector

Build an ESP32 water leak detector with resistive water sensor AOUT GPIO34, DOUT GPIO35, buzzer GPIO25, wet/dry thres…

Beginner50-80 minAges 12+

Detect water using analog and digital sensor outputs.Understand why resistive water probes corrode over time.Create a safe local buzzer/LED alarm.Choose sensor placement for real leaks.

Next Challenge

ESP32 Smart Thermostat: Temperature Control and Code

Build a low-voltage ESP32 DHT22 fan thermostat with 27 C/25.5 C hysteresis, relay polarity settings, startup OFF and…

Intermediate90-120 minAges 12+

Wire and test the DHT22 temperature sensor on GPIO4 before connecting the relay circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control a relay module from GPIO26 using clear threshold and relay-polarity constants instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Advanced Upgrade

ESP32 Smart Irrigation System

Build a calibrated ESP32 soil-moisture controller with a documented active-HIGH relay, low-voltage pump wiring, hyste…

Beginner90-150 minAges 12+

Wire and test the soil moisture probe before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control relay-controlled pump using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Parent: Robotics and Motion

Best First

ESP32 Line Following Robot

Build an ESP32 line following robot with two IR sensors, motor driver wiring, sensor calibration, steering logic, tro…

Intermediate90-150 minAges 12+

Wire analog IR sensor outputs to GPIO34 and GPIO35 and print raw ADC readings.Calibrate separate left and right thresholds from the actual track surface.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control a dual H-bridge motor driver on GPIO16-GPIO19 using simple two-sensor steering logic.

Next Challenge

ESP32 Smart Parking Sensor

Build an ESP32 smart parking sensor with HC-SR04 TRIG GPIO5, protected ECHO GPIO18, 5 V sensor power, LED status, dis…

Beginner60-90 minAges 12+

Trigger an HC-SR04 sensor from an ESP32.Protect the ESP32 input from a 5 V echo signal.Convert echo time into distance in centimeters.Choose a parking threshold from measured data.

Advanced Upgrade

ESP32 WiFi Robot Controller

Build a browser-controlled ESP32 robot that drives motors from Wi-Fi commands served by the board itself.

Intermediate90-150 minAges 12+

Wire and test the web control commands before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control dual motor driver using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Parent: Cameras and Computer Vision

Best First

ESP32 Camera Capture Server

Build an ESP32-CAM capture server with AI-Thinker OV2640 pin mapping, FTDI upload wiring, stable 5 V power, local /ca…

Intermediate90-120 minAges 12+

Program an ESP32-CAM safely with an FTDI adapter.Understand boot mode using IO0.Capture a camera frame and serve or store it.Recognize power-related camera failures.

Next Challenge

ESP32-CAM QR Code Scanner

Build an ESP32-CAM QR code scanner with AI-Thinker wiring, OV2640 grayscale capture, on-device Quirc decoding, Serial…

Intermediate90-130 minAges 12+

Program and boot an ESP32-CAM correctly.Capture frames suitable for QR decoding.Understand why lighting and focus affect recognition.Print decoded text to Serial Monitor.

Advanced Upgrade

ESP32-CAM Local Network Camera Demo

Build an ESP32-CAM local network snapshot page with AI-Thinker OV2640 pin map, stable 5 V power, FTDI upload steps, W…

Intermediate60-75 minAges 13+

ESP32-CAM pin mappingLocal web serverWi-Fi setupPrivacy boundaries

Parent: AI and Advanced Builds

Best First

Build an APDS-9960 Gesture Control Demo

Build a technically honest ESP32 gesture demo with APDS-9960 I2C wiring, interrupt handling, LED outputs, and false-t…

Intermediate60-75 minAges 12+

I2C wiringInterrupt inputLED outputsSensor limitations

Next Challenge

ESP32 LoRa Remote Sensor Node (Point-to-Point)

Build a two-node ESP32 LoRa sensor link with real point-to-point radio, legal frequency checks, antenna safety, and p…

Intermediate90-120 minAges 12+

SPI wiringRF packet validationDHT22 readingsLegal radio awareness

Advanced Upgrade

ESP32 Low-Voltage Energy Meter Demo

Build a low-voltage ESP32 energy-measurement demonstration using ADC readings and relative power calculations.

Intermediate90-120 minAges 13+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Teacher: First ESP32 Project

Best First

ESP32 Learning Trainer Board

Classroom ESP32 trainer with a push button on GPIO12 and status LED on GPIO14.

Beginner45-60 minAges 10+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 Distance Monitoring System

Build an ESP32 HC-SR04 distance monitor with TRIG GPIO5, ECHO GPIO18 through a 10 kOhm / 20 kOhm divider, 5 V sensor…

Beginner60-75 minAges 11+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Advanced Upgrade

ESP32 RGB LED Pattern Controller

Learn PWM color mixing with a single common-cathode RGB LED and a button-driven non-blocking pattern state machine on…

Beginner45-60 minAges 10+

PWMButton debouncingState machinesAdditive color

Teacher: Sensors and Data

Best First

ESP32 Distance Monitoring System

Build an ESP32 HC-SR04 distance monitor with TRIG GPIO5, ECHO GPIO18 through a 10 kOhm / 20 kOhm divider, 5 V sensor…

Beginner60-75 minAges 11+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 IoT Weather Station: BME280 Arduino Code

Build an ESP32 BME280 weather station with I2C wiring on GPIO21/GPIO22, 3.3 V power, Arduino code, Serial Monitor out…

Beginner60-90 minAges 12+

Wire a BME280 sensor over I2C using common Arduino-ESP32 GPIO21/GPIO22 defaults.Detect whether the BME280 responds at 0x76 or 0x77.Read temperature, humidity, and pressure and print clear labeled Serial Monitor values.Interpret local pressure in hPa without confusing it with sea-level adjusted weather reports.

Advanced Upgrade

ESP32 Air Quality Monitor

Build an ESP32 MQ135 air quality monitor with GPIO34 analog readings, warm-up and baseline testing, GPIO26 fan or rel…

Beginner75-100 minAges 12+

Read a gas sensor as an analog input.Create a fresh-air baseline before choosing an alert threshold.Drive a relay or fan control signal safely from an ESP32 GPIO.Understand why gas sensors need warm-up and calibration.

Teacher: Smart Home and IoT

Best First

ESP32 Smart Irrigation System

Build a calibrated ESP32 soil-moisture controller with a documented active-HIGH relay, low-voltage pump wiring, hyste…

Beginner90-150 minAges 12+

Wire and test the soil moisture probe before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control relay-controlled pump using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Next Challenge

ESP32 MQTT DHT22 Sensor Publisher

Publish DHT22 readings to a local MQTT broker, subscribe to a sample command, use unique client IDs and diagnose reco…

Intermediate90-120 minAges 12+

Wire and read a DHT22 sensor.Connect ESP32 to Wi-Fi safely in Arduino code.Publish readings to an MQTT topic.Understand broker, publisher, subscriber, and topic names.

Advanced Upgrade

ESP32 Smart Street Light

Build an ESP32 smart street light with LDR analog input on GPIO33, relay or low-voltage lamp control on GPIO25, thres…

Beginner70-100 minAges 12+

Read an LDR voltage divider with ESP32 analog input.Use a threshold and hysteresis for stable day/night control.Drive a relay or transistor-controlled lamp output safely.Understand why sensor placement matters outdoors.

Teacher: Robotics and Motion

Best First

ESP32 Line Following Robot

Build an ESP32 line following robot with two IR sensors, motor driver wiring, sensor calibration, steering logic, tro…

Intermediate90-150 minAges 12+

Wire analog IR sensor outputs to GPIO34 and GPIO35 and print raw ADC readings.Calibrate separate left and right thresholds from the actual track surface.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control a dual H-bridge motor driver on GPIO16-GPIO19 using simple two-sensor steering logic.

Next Challenge

ESP32 Educational Servo Arm Controller (3-DOF)

Build a small joystick-controlled 3-DOF servo arm on ESP32 with safe angle limits, incremental motion, and separate s…

Intermediate90-120 minAges 13+

Servo PWMJoystick ADCAngle constraintsSeparate power domains

Advanced Upgrade

ESP32 Smart Parking Sensor

Build an ESP32 smart parking sensor with HC-SR04 TRIG GPIO5, protected ECHO GPIO18, 5 V sensor power, LED status, dis…

Beginner60-90 minAges 12+

Trigger an HC-SR04 sensor from an ESP32.Protect the ESP32 input from a 5 V echo signal.Convert echo time into distance in centimeters.Choose a parking threshold from measured data.

Teacher: Cameras and Computer Vision

Best First

ESP32 Camera Capture Server

Build an ESP32-CAM capture server with AI-Thinker OV2640 pin mapping, FTDI upload wiring, stable 5 V power, local /ca…

Intermediate90-120 minAges 12+

Program an ESP32-CAM safely with an FTDI adapter.Understand boot mode using IO0.Capture a camera frame and serve or store it.Recognize power-related camera failures.

Next Challenge

ESP32-CAM QR Code Scanner

Build an ESP32-CAM QR code scanner with AI-Thinker wiring, OV2640 grayscale capture, on-device Quirc decoding, Serial…

Intermediate90-130 minAges 12+

Program and boot an ESP32-CAM correctly.Capture frames suitable for QR decoding.Understand why lighting and focus affect recognition.Print decoded text to Serial Monitor.

Advanced Upgrade

ESP32-CAM Color Object Detector Demo

Build an ESP32-CAM color object detector demo with AI-Thinker OV2640 wiring, RGB565 thresholding on the ESP32, LED ou…

Intermediate90-120 minAges 13+

ESP32-CAM setupRGB565 pixelsThreshold tuningAI claim limits

Teacher: AI and Advanced Builds

Best First

Build an APDS-9960 Gesture Control Demo

Build a technically honest ESP32 gesture demo with APDS-9960 I2C wiring, interrupt handling, LED outputs, and false-t…

Intermediate60-75 minAges 12+

I2C wiringInterrupt inputLED outputsSensor limitations

Next Challenge

ESP32-CAM Color Object Detector Demo

Build an ESP32-CAM color object detector demo with AI-Thinker OV2640 wiring, RGB565 thresholding on the ESP32, LED ou…

Intermediate90-120 minAges 13+

ESP32-CAM setupRGB565 pixelsThreshold tuningAI claim limits

Advanced Upgrade

ESP32 Lightning Detector: AS3935 Sensor Demo

Build an ESP32 AS3935 lightning sensor demo with SPI wiring, interrupt handling, OLED output, noise/disturber classif…

Advanced75-90 minAges 14+

SPI wiringInterrupt handlingNoise classificationSafety limitations

Maker: First ESP32 Project

Best First

ESP32 Learning Trainer Board

Classroom ESP32 trainer with a push button on GPIO12 and status LED on GPIO14.

Beginner45-60 minAges 10+

Wire the exact GPIO pins used by the sketch.Run the starter code and compare output with the wiring table.Explain the main sensor or input signal in plain language.Troubleshoot one wiring mistake using Serial Monitor evidence.

Next Challenge

ESP32 IoT Weather Station: BME280 Arduino Code

Build an ESP32 BME280 weather station with I2C wiring on GPIO21/GPIO22, 3.3 V power, Arduino code, Serial Monitor out…

Beginner60-90 minAges 12+

Wire a BME280 sensor over I2C using common Arduino-ESP32 GPIO21/GPIO22 defaults.Detect whether the BME280 responds at 0x76 or 0x77.Read temperature, humidity, and pressure and print clear labeled Serial Monitor values.Interpret local pressure in hPa without confusing it with sea-level adjusted weather reports.

Advanced Upgrade

ESP32 MQTT DHT22 Sensor Publisher

Publish DHT22 readings to a local MQTT broker, subscribe to a sample command, use unique client IDs and diagnose reco…

Intermediate90-120 minAges 12+

Wire and read a DHT22 sensor.Connect ESP32 to Wi-Fi safely in Arduino code.Publish readings to an MQTT topic.Understand broker, publisher, subscriber, and topic names.

Maker: Sensors and Data

Best First

ESP32 Vibration Monitor

Build an ESP32 vibration monitor with MPU6050 accelerometer. From threshold alerts to FFT spectrum analysis and MQTT…

Intermediate75-90 minAges 13+

I2C sensor wiringAcceleration magnitudeThreshold calibrationFalse-trigger analysis

Next Challenge

ESP32 Lightning Detector: AS3935 Sensor Demo

Build an ESP32 AS3935 lightning sensor demo with SPI wiring, interrupt handling, OLED output, noise/disturber classif…

Advanced75-90 minAges 14+

SPI wiringInterrupt handlingNoise classificationSafety limitations

Advanced Upgrade

Build an Isolated AC Current Monitor Prototype

Build a bounded ESP32 AC current monitor prototype with an SCT-013 clamp, ADC biasing, calibration limits, and strict…

Advanced90-120 minAges 14+

Isolated sensingADC biasingRMS estimateCalibration limits

Maker: Smart Home and IoT

Best First

ESP32 MQTT DHT22 Sensor Publisher

Publish DHT22 readings to a local MQTT broker, subscribe to a sample command, use unique client IDs and diagnose reco…

Intermediate90-120 minAges 12+

Wire and read a DHT22 sensor.Connect ESP32 to Wi-Fi safely in Arduino code.Publish readings to an MQTT topic.Understand broker, publisher, subscriber, and topic names.

Next Challenge

Build a Low-Voltage Smart Power Strip Simulator

Build a low-voltage ESP32 smart power strip simulator with MOSFET outputs on GPIO25, GPIO26, GPIO27, GPIO33 and no ma…

Intermediate60-75 minAges 12+

MOSFET low-side switchingFail-safe startupLocal web controlsShared-ground wiring

Advanced Upgrade

ESP32 Home Climate Automation

Build a room climate controller that reads environmental data and automatically controls a fan, vent, or humidifier i…

Beginner90-150 minAges 12+

Wire and test the DHT22 or BME280 climate sensor before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control relay output using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Maker: Robotics and Motion

Best First

ESP32 WiFi Robot Controller

Build a browser-controlled ESP32 robot that drives motors from Wi-Fi commands served by the board itself.

Intermediate90-150 minAges 12+

Wire and test the web control commands before connecting the rest of the circuit.Map each signal to a named ESP32 GPIO and keep the code constants readable.Control dual motor driver using a clear threshold or command instead of hidden magic numbers.Use Serial Monitor as an engineering tool, not only as a success message.

Next Challenge

ESP32 Educational Servo Arm Controller (3-DOF)

Build a small joystick-controlled 3-DOF servo arm on ESP32 with safe angle limits, incremental motion, and separate s…

Intermediate90-120 minAges 13+

Servo PWMJoystick ADCAngle constraintsSeparate power domains

Advanced Upgrade

Build a Low-Voltage CNC Motion Controller Demo

Build a bounded ESP32 CNC motion-control demo with A4988 STEP/DIR wiring, separate motor power, current-limit setup…

Advanced90-120 minAges 14+

STEP/DIR signalingExternal motor driverCurrent limitingMotion safety

Maker: Cameras and Computer Vision

Best First

ESP32 Camera Capture Server

Build an ESP32-CAM capture server with AI-Thinker OV2640 pin mapping, FTDI upload wiring, stable 5 V power, local /ca…

Intermediate90-120 minAges 12+

Program an ESP32-CAM safely with an FTDI adapter.Understand boot mode using IO0.Capture a camera frame and serve or store it.Recognize power-related camera failures.

Next Challenge

Build an ESP32-CAM Face Detection Privacy Demo

Build a local ESP32-CAM face detection demo that distinguishes detection from recognition, with privacy, lighting, me…

Advanced90-120 minAges 14+

ESP32-CAM pin mapLocal Wi-Fi cameraFace detection limitsPrivacy consent

Advanced Upgrade

ESP32-CAM Color Object Detector Demo

Build an ESP32-CAM color object detector demo with AI-Thinker OV2640 wiring, RGB565 thresholding on the ESP32, LED ou…

Intermediate90-120 minAges 13+

ESP32-CAM setupRGB565 pixelsThreshold tuningAI claim limits

Maker: AI and Advanced Builds

Best First

ESP32-CAM Color Object Detector Demo

Build an ESP32-CAM color object detector demo with AI-Thinker OV2640 wiring, RGB565 thresholding on the ESP32, LED ou…

Intermediate90-120 minAges 13+

ESP32-CAM setupRGB565 pixelsThreshold tuningAI claim limits

Next Challenge

Build an APDS-9960 Gesture Control Demo

Build a technically honest ESP32 gesture demo with APDS-9960 I2C wiring, interrupt handling, LED outputs, and false-t…

Intermediate60-75 minAges 12+

I2C wiringInterrupt inputLED outputsSensor limitations

Advanced Upgrade

ESP32 LoRa Remote Sensor Node (Point-to-Point)

Build a two-node ESP32 LoRa sensor link with real point-to-point radio, legal frequency checks, antenna safety, and p…

Intermediate90-120 minAges 12+

SPI wiringRF packet validationDHT22 readingsLegal radio awareness

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