The best way to start with ESP32 is to build three small projects in sequence: blink an LED, switch it from a web page on your local Wi-Fi network, then read a sensor and make its value available over the network. Each project adds one main idea, so you can practice GPIO first, then HTTP and networking, before combining a sensor with connectivity.
What you need before starting
For Espressif’s ESP-IDF v5.5 setup flow, the listed hardware is an ESP32 development board, a USB cable and a computer running Windows, Linux or macOS. Espressif names the ESP32-DevKitC among its official boards. See the ESP-IDF v5.5 getting-started guide for the setup instructions for that version.
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A suitable search term when choosing hardware is “ESP32 development board.” Check the particular board’s USB connector and pinout, whether it has an onboard LED, and whether it includes the sensor you intend to use. ESP32 boards do not all have the same components. If the board lacks an LED, you can use an external LED, a suitable current-limiting resistor and a GPIO documented for that board.
The Tool Desk
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1. Blink an LED
Make the board’s onboard LED turn on and off, or wire an external LED to a documented GPIO through a current-limiting resistor. This first project teaches the basic workflow: edit a program, compile it, flash it to the board and use a GPIO pin as an output.
Start with Espressif’s blink example or the corresponding exercise in the workshop. If the LED does not respond, check that the example targets the GPIO connected to your board’s LED; onboard LED pins are not universal. For an external LED, check its orientation and wiring, and confirm that the pin number in the program matches the connection.
Rank #2
- ESP32 camera board: Dual-core 32-bit microprocessor up to 240 MHz, 4 MB flash, 8 MB PSRAM, onboard 2.4 GHz Wi-Fi and Bluetooth 4.2 (LE), USB code uploader, camera, memory card slot (Comes with 1GB memory card and card reader)
- 3 sets of code: MicroPython, C and Processing (Java). Python is one of the most popular languages, and C is one of the most classic languages. Processing code needs to run on computers to provide graphical interfaces
- Detailed tutorial: Can be downloaded (in English, 795-page in total) or viewed online (original in English, can be translated into other languages by browsers) (The tutorial link can be found on the product box, no paper tutorial)
- 122 projects from simple to complex: Provides step-by-step guide with electronics and components knowledge, each project has schematics, wiring diagrams, complete code and detailed explanations
- 240 items in total: This ultimate kit includes the most commonly used electronic components, modules, sensors, wires and other compatible items
2. Switch the LED from a local web page
Next, connect the ESP32 to your local Wi-Fi network and have it serve a simple web page or HTTP endpoints. A phone or computer on the same network can then send a request to turn the LED on or off. Espressif’s workshop uses GET routes for those actions and offers blinking as an optional route.
This adds Wi-Fi and HTTP to the GPIO work from the first project. If you use Arduino-ESP32, its WebServer HelloServer example demonstrates a server for a local network, HTTP requests and JSON responses. The example is on the repository’s moving master branch, so its code may change.
Rank #3
- Perfect choice for beginners to learn, electronics and program.
- The Basic Starter Kit is easy to use and you can learn to program at an introductory level.
- You can use ESP32 modules to control other modules, such as LED,DHT11,OLED module, etc
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Keep this demonstration on your local network. A beginner web server should not be treated as hardened for public internet access. Espressif’s Wi-Fi soft-AP tutorial warns that its simple provisioning technique is “inherently less secure” and points real-world applications toward Unified Provisioning with security schemes.
3. Read a sensor and share its value
For the third project, read an onboard or external sensor and return its reading in a simple HTTP response. This combines the network work from the web-page project with a new peripheral interface. Espressif’s workshop includes GPIO and I2C exercises and culminates in a sensor gateway that combines connectivity and peripheral control.
Rank #4
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- INPUTS, OUTPUTS, AND CONTROL: Features an I2C OLED display for showing data, a 2-channel 5V relay module for controlling high-power devices (rated 10A 250VAC / 15A 125VAC), active and passive buzzers for audio feedback, various color LEDs, push buttons, and a potentiometer for precise analog input.
- PROTOTYPING ESSENTIALS INCLUDED: Get building right away with an 830-tie-point solderless breadboard, a bundle of male-to-male jumper wires, a USB cable for power and programming the ESP32 board, and a variety of common resistors. The kit is perfect for both beginners and experienced makers.
First verify that your board actually has the sensor you plan to read. If it does not, select a compatible external sensor and follow the documentation for that sensor and your board. The workshop’s onboard environmental-sensor examples are specific to its hardware; they do not mean every ESP32 development board includes an environmental sensor.
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- ESP32-S3 camera board: Dual-core 32-bit microprocessor up to 240 MHz, 8 MB flash, 8 MB PSRAM, onboard 2.4 GHz Wi-Fi and Bluetooth 5 (LE), USB-OTG, USB code uploader, camera, memory card slot (Comes with 1GB memory card and card reader)
- 3 sets of code: MicroPython, C and Processing (Java). Python is one of the most popular languages, and C is one of the most classic languages. Processing code needs to run on computers to provide graphical interfaces
- Detailed tutorial: Can be downloaded (in English, 828-page in total) or viewed online (original in English, can be translated into other languages by browsers) (The tutorial link can be found on the product box, no paper tutorial)
- 121 projects from simple to complex: Provides step-by-step guide with electronics and components knowledge, each project has schematics, wiring diagrams, complete code and detailed explanations
- 243 items in total: This ultimate kit includes the most commonly used electronic components, modules, sensors, wires and other compatible items
How the three projects build on one another
| Project | New concepts | Extra hardware | Main debugging scope |
|---|---|---|---|
| Blink an LED | GPIO output | Possibly none if the board exposes an onboard LED; otherwise an LED and current-limiting resistor | One output peripheral |
| Control an LED over local Wi-Fi | Wi-Fi and HTTP, alongside GPIO | No additional component is inherent to the project; the board must be able to join the chosen network | Network connection and LED output |
| Read a sensor over the network | Sensor interface and integration with connectivity | Depends on whether the selected board includes a suitable sensor | Network connection and sensor |
This is a practical learning progression, not an objective ranking. It follows the progression in Espressif’s workshop from blink, to HTTP LED control, to a sensor gateway.
Choose a software path and keep it consistent
Two useful starting points are Espressif’s ESP-IDF setup guide and the Arduino-ESP32 WebServer example. The sources establish both options, but do not establish that one is universally easier. Choose based on the environment you want to learn, then follow the setup and example instructions for that environment rather than mixing steps from different toolchains.
The ESP-IDF guide linked above documents stable v5.5. The Arduino example is on the moving master branch. Check the current installation guidance and the documentation for your exact board before following version-specific steps.
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