ESP32-S3-Zero-M Mini Development Board (Pre-Soldered Header)

ESP32-S3-Zero-M Development Board – 4MB Flash 2MB PSRAM with Pre-Soldered Headers

Product Description

The ESP32-S3-Zero-M Development Board is an ultra-compact and high-performance development platform based on the ESP32-S3FH4R2 dual-core Xtensa LX7 processor. With a clock speed of up to 240MHz, integrated 2.4GHz Wi-Fi, Bluetooth 5 LE, and hardware support for AI acceleration, the board provides a powerful solution for modern IoT, embedded, robotics, and AIoT projects.

This version comes with pre-soldered headers, allowing the board to be used immediately with compatible breadboards and female headers without requiring additional soldering. Its small footprint makes it especially useful for portable electronics, wearable devices, compact sensors, and space-constrained robotic systems.

The ESP32-S3-Zero-M includes 4MB Flash and 2MB PSRAM, providing additional memory resources for firmware, data processing, graphics, sensor applications, and other embedded tasks. The ESP32-S3 platform also provides specialized instructions suitable for AI and signal-processing workloads.

The board features a USB Type-C native USB interface and does not require a separate external USB-to-UART converter chip for standard USB communication. It also includes an onboard WS2812 RGB LED connected to GPIO21, making it convenient for status indication, debugging, and lighting effects.

With 24 programmable GPIOs and support for interfaces such as SPI, I2C, UART, and I2S, the board can be connected to a wide range of sensors, displays, audio devices, actuators, and communication modules.

Features

• Based on ESP32-S3FH4R2 dual-core LX7 microcontroller
• Dual-core 32-bit Xtensa LX7 processor
• Clock speed up to 240MHz
• 4MB Flash memory
• 2MB PSRAM
• 2.4GHz Wi-Fi
• Bluetooth 5 LE
• Native USB Type-C interface
• 24 programmable GPIO pins
• Onboard WS2812 RGB LED
• RGB LED connected to GPIO21
• Onboard ceramic antenna
• Castellated / stamp-hole style board design
• Pre-soldered headers
• Supports SPI, I2C, UART, and I2S
• AI and signal-processing support
• Compact and lightweight form factor
• Suitable for wearable and portable applications
• Compatible with Arduino IDE, ESP-IDF, and MicroPython

Specifications

Parameter	Specification
Product Type	ESP32-S3-Zero-M Development Board
Main MCU	ESP32-S3FH4R2
Processor	Dual-Core Xtensa LX7
Clock Speed	Up to 240MHz
Flash Memory	4MB
PSRAM	2MB
Wireless	2.4GHz Wi-Fi & Bluetooth 5 LE
USB	USB Type-C / Native USB
GPIO	24 Programmable Pins
RGB LED	WS2812
RGB LED Pin	GPIO21
LDO Regulator	ME6217C33M5G
LDO Output	Up to 800mA
Antenna	Onboard Ceramic Antenna
Board Design	Castellated / Stamp Hole
Header Type	Pre-Soldered
Interfaces	SPI, I2C, UART, I2S
Dimensions	Approximately 23.5 × 18mm
Development Support	Arduino IDE, ESP-IDF, MicroPython

Design and Construction

The ESP32-S3-Zero-M is designed around an ultra-compact Zero-style PCB layout, making it suitable for applications where board size is an important consideration.

Its castellated edge design allows the board to be used not only as a development board but also as an embedded module in custom PCB designs. The onboard ceramic antenna provides wireless connectivity without requiring a separate external antenna for typical applications.

The pre-soldered headers make the development board convenient for immediate prototyping and breadboard-based projects.

The integrated RGB LED provides a simple visual output that can be used for debugging, status indication, wireless connection feedback, or custom lighting effects.

Working Principle

The ESP32-S3 acts as the main processing and connectivity controller for the project. Firmware can be uploaded through the USB Type-C interface using supported development environments such as Arduino IDE, ESP-IDF, or MicroPython.

The processor can receive data from connected sensors and peripherals through GPIO, I2C, SPI, UART, and I2S interfaces and can control external devices such as LEDs, motors, displays, and other actuators.

The integrated Wi-Fi and Bluetooth LE connectivity allows the board to communicate with wireless networks, smartphones, computers, IoT devices, and other connected systems.

The available Flash and PSRAM memory provide additional resources for more demanding applications such as graphical interfaces, data processing, AI-assisted applications, and larger embedded programs.

Onboard RGB LED

The board includes an WS2812 RGB LED connected to GPIO21.

The programmable RGB LED can be used for:

• System status indication
• Wi-Fi connection status
• Bluetooth status
• Sensor alerts
• Debugging
• User-interface effects
• Decorative lighting

Wireless Connectivity

The ESP32-S3-Zero-M supports 2.4GHz Wi-Fi and Bluetooth 5 LE, making it suitable for a wide range of wireless applications.

Wi-Fi can be used for:

• IoT cloud connectivity
• Web servers
• Remote monitoring
• Wireless data transfer
• Smart home devices
• Network-controlled robotics

Bluetooth LE can be used for:

• Smartphone communication
• BLE sensors
• Remote controls
• Wearable devices
• Short-range wireless configuration

Typical Application Scenarios

AIoT Applications

The ESP32-S3-Zero-M is suitable for edge-AI and AIoT projects involving sensor processing, voice-related applications, image processing, and intelligent automation.

Wearable Devices

Its compact size makes it suitable for smart wearables, portable controllers, fitness devices, and other small battery-powered electronics.

Smart Home

The board can be used for compact Wi-Fi/Bluetooth sensor nodes, smart switches, environmental monitoring devices, and home automation controllers.

DIY Robotics

The small form factor makes it suitable for micro-robots, small drones, robotic sensors, wireless controllers, and other compact robotic systems.

Applications

• IoT projects
• AIoT applications
• Smart home systems
• Wireless sensor nodes
• Wearable electronics
• Portable electronics
• Mini robotics
• Drones
• Embedded systems
• Bluetooth projects
• Wi-Fi projects
• Camera and image-processing projects
• Voice and audio projects
• Sensor monitoring
• Automation projects
• Arduino projects
• MicroPython projects
• ESP-IDF development
• Educational electronics
• Custom PCB development
• Compact product prototypes

Package Includes

• 1 × ESP32-S3-Zero-M Development Board
• Pre-Soldered Headers

Product Disclaimer

Product images are shown for illustrative and representational purposes only. The actual board may vary slightly in PCB colour, component placement, connector design, LED appearance, antenna arrangement, chip marking, or other visual details depending on the manufacturing batch.

USB Type-C cable, sensors, breadboards, jumper wires, batteries, and other accessories shown in product images are not included unless specifically mentioned in the package contents.

Specifications such as memory configuration, GPIO availability, regulator characteristics, and connector arrangement should be verified against the exact hardware version before use in a final or production application.

Important Notes

Pre-Soldered Version

This product is the pre-soldered header version, ready for direct use with compatible breadboards and female headers.

USB Interface

The board uses a native USB Type-C interface, allowing convenient programming and USB communication without requiring a separate external USB-to-UART converter chip for standard supported USB functions.

GPIO Availability

Although the board exposes 24 programmable GPIO pins according to the supplied specifications, not every ESP32-S3 GPIO may be freely available for every application because some pins can have dedicated board functions.

Power Supply

Use a suitable power source and ensure the connected peripherals do not exceed the capabilities of the onboard regulator and USB power source.

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