ESP32-S3 Zero - Dual-Core, 2MB PSRAM, WiFi + BLE 5

Name: ESP32-S3 Zero Dev Board - Dual-Core, 2MB PSRAM, WiFi + BLE 5, RGB LED
Brand: NZN Electronics
SKU: ESP32-S3-ZERO-1PK
Price: 9.99 NZD
Availability: InStock

ESP32-S3 Zero development board with two loose 2.54mm male header strips

ESP32-S3 Zero Dev Board - Dual-Core, 2MB PSRAM, WiFi + BLE 5, RGB LED

$9.99 NZD

ESP32-S3 Zero Dev Board - Dual-Core, 2MB PSRAM, WiFi + BLE 5, RGB LED

$9.99 NZD

Rated 4.9/5 by 20 NZN customers Verified

Shipping from $5.99 urban / $9.99 rural.

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The ESP32-S3 Zero fits a full dual-core ESP32-S3 into 23.5 x 18 mm. Two Xtensa LX7 cores at up to 240MHz with vector instructions for on-device ML, 4MB of flash alongside 2MB of PSRAM, 2.4GHz WiFi and Bluetooth 5 (LE), and a USB-C port the chip drives natively so there is no driver to chase. The edges are castellated with plated through-holes, so you can fit the supplied headers and breadboard it today, then reflow the same board straight onto your own carrier later.

ESP32-S3 dual-core Xtensa LX7, up to 240MHz
4MB flash plus 2MB PSRAM, 512KB SRAM
2.4GHz WiFi (802.11 b/g/n) and Bluetooth 5 (LE)
Vector (SIMD) instructions for TinyML and edge AI
Native USB OTG over USB-C, no driver to install
26 GPIO broken out, 8 of them on the underside
Castellated edges plus through-holes for reflow or headers
Addressable WS2812 RGB LED on GPIO21

Specifications

ChipEspressif ESP32-S3FH4R2

CPUDual-core Xtensa LX7, up to 240MHz

Flash4MB, in package

PSRAM2MB, in package

SRAM512KB, plus 384KB ROM

WiFi2.4GHz 802.11 b/g/n

BluetoothBluetooth 5 (LE)

USBUSB-C, native USB Serial/JTAG and OTG

GPIO26 broken out, all PWM capable

Onboard LEDWS2812 addressable RGB on GPIO21

ButtonsBOOT and RESET

AntennaOnboard ceramic antenna

Logic voltage3.3V, not 5V tolerant

Dimensions23.5 x 18mm, 2.54mm pin pitch

MountingCastellated edges + plated through-holes

Full technical datasheet, pin map and boot notes PDF

What's in the box

1×

ESP32-S3 Zero board

Tested and powered up before it leaves us.

2×

2.54mm male header strips

Supplied loose, not fitted. Solder them straight, right-angle or low-profile to suit your build, or leave them off and reflow the board by its castellated edges.

Great for

Edge AI and TinyML on a tiny footprint

USB HID devices (keyboard and mouse emulation)

Reflowing onto your own PCB as a module

ESPHome and Home Assistant nodes

WiFi web servers, MQTT and REST devices

Addressable-LED and wearable projects

Good to know: Logic is 3.3V and the GPIO are not 5V tolerant, so level shift anything running at 5V. Program it through the free Arduino IDE (install the Espressif esp32 board package, select ESP32S3 Dev Module, set USB CDC On Boot to Enabled and PSRAM to QSPI PSRAM), or use PlatformIO, MicroPython, CircuitPython or ESPHome. Plug in with a USB-C data cable; if no port appears, hold BOOT, tap RESET, then release BOOT.

Got questions?

Frequently asked questions

What is the Zero form factor?

A very small board with castellated edges plus plated through-holes. That means you can fit the supplied headers and use it on a breadboard, or reflow the whole board onto your own PCB like a module. At 23.5 x 18mm it is one of the smallest boards in the ESP32 family.

Does it really have PSRAM?

Yes. The chip is an ESP32-S3FH4R2, which carries 4MB of flash and 2MB of PSRAM in the same package, on top of the 512KB of SRAM in the silicon. The PSRAM is what makes camera buffers, larger TinyML models and bigger display framebuffers practical on a board this size.

Are the header pins fitted?

No. Two 2.54mm male header strips are supplied loose in the bag so you can choose straight, right-angle or low-profile, or skip them entirely and reflow the board by its castellated edges.

Can it act as a USB keyboard or mouse?

Yes. The ESP32-S3 has native USB OTG, so it can present as a USB HID device (keyboard, mouse, gamepad) as well as a serial port, without any bridge chip.

Does it need a driver?

No. The chip drives USB itself and enumerates as a native USB Serial/JTAG device, so Windows, macOS and Linux all see it with the driver already in the operating system. There is no CH340 or CP2102 on this board. Use a USB-C data cable, not a charge-only one.

How does it compare to the ESP32-C3 SuperMini?

The C3 SuperMini is a single-core RISC-V board with 13 GPIO and no PSRAM, and it is the cheaper option for simple WiFi and BLE jobs. The S3 Zero is dual-core, adds 2MB of PSRAM and vector instructions for ML, and breaks out 26 GPIO including eight pads on the underside. Pick the S3 Zero when you need the GPIO count, the memory or the USB HID support.

Which board do I select in the Arduino IDE?

Install the Espressif esp32 board package, then choose ESP32S3 Dev Module and set USB CDC On Boot to Enabled. Without that setting the Serial Monitor stays blank because the console is routed to the UART pins instead of USB.

How do I drive the onboard RGB LED?

It is a single WS2812 addressable LED on GPIO21. Use the Adafruit NeoPixel or FastLED library with one pixel on pin 21. There is no plain on/off LED on this board.

Why buy from NZN

International prices. None of the international wait.

We're a small Kiwi-owned shop, and we stock the same boards and parts you'd usually order from overseas, for about the same price. The only real difference is they ship from Te Awamutu, so you get them in a few days instead of waiting weeks.

Run by Kiwis, here in Te Awamutu

We're NZ owned and operated, and every order is picked, packed and sent from our place in Te Awamutu, Waikato.

Get it in days, not weeks

Order before 8am and it ships the same day, otherwise within 24 hours guaranteed. No waiting three to six weeks for a parcel to crawl over from overseas.

Low prices are the goal

As a maker myself, I want New Zealand to have a genuine low-price local option for electronics, not overpriced shelves or a long wait on an international parcel.