ESP32-C3-Zero Development Board Waveshare - castellated module with onboard antenna

ESP32-C3-Zero Development Board Waveshare

ESP32-C3-Zero Development Board Waveshare

Name: ESP32-C3-Zero Development Board Waveshare
Brand: Αντωνιάδης | antoniadis.com.cy
SKU: ESP024
Price: 8.95 EUR
Availability: InStock

ESP32/ESP8266 Boards

Reference: ESP024

Part.No: ESP32-C3-Zero

€8.95

In Stock

Immediate Dispatch

The ESP32-C3-Zero Development Board by Waveshare is a compact board built around the ESP32-C3 (RISC-V), with Wi-Fi 802.11 b/g/n and Bluetooth 5 (LE). It features castellated pads and an onboard antenna, allowing direct soldering onto a custom PCB.

4MB Flash, 400KB SRAM
15 GPIO pins (3xSPI, 1xI2C, 2xUART, 1xI2S, 2xADC)
Native USB serial controller (no separate chip needed)
Compact 18 x 23.5 mm footprint
Castellated module - can be soldered directly onto a carrier board

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Description
Product Details

ESP32-C3-Zero: From breadboard prototyping to production PCB

The ESP32-C3-Zero by Waveshare is a very compact development board built around the ESP32-C3 chip (RISC-V, low power), with Wi-Fi 802.11 b/g/n and Bluetooth 5 (LE). What sets it apart from other compact boards in this category are the castellated pads along its edge: beyond use with pin headers on a breadboard, it can be soldered directly (SMD reflow) onto your own custom PCB — ideal when moving from prototyping to a small production run.

Technical Specifications

Feature	Value
Chip	ESP32-C3 (RISC-V 32-bit, single-core, up to 160MHz)
RAM / ROM	400KB SRAM, 384KB ROM
Flash	4MB onboard
Wi-Fi	802.11 b/g/n, 2.4GHz
Bluetooth	Bluetooth 5 (LE)
GPIO	15 pins (flexibly configurable)
Interfaces	3xSPI, 1xI2C, 2xUART, 1xI2S, 2xADC
Antenna	Onboard ceramic antenna
Module	Castellated edges - supports direct soldering onto a carrier board
USB	Native USB serial full-speed controller (no separate USB-to-Serial chip)
Dimensions	18 x 23.5 mm

⚠️ Note: Because of the native USB controller, certain GPIO pins (strapping pins) determine the boot mode. Check Waveshare's pinout before wiring external circuits to these pins.

Comparison with other compact ESP32-C3 boards

Board	Distinguishing feature	GPIO	USB
ESP32-C3-Zero (Waveshare)	Castellated module - solders directly onto a PCB	15	Native, USB-C (typical)
ESP32-C3 SuperMini	Smaller footprint, breadboard-friendly	11	Native USB
ESP32-C3 Mini Dual Type-C	Two Type-C ports	22	Native USB, dual port
Seeed XIAO ESP32-C3	Seeed ecosystem, expansion boards	11 usable	Native USB-C

Who is this for

Product Designers & Hardware Engineers: The castellated format allows direct integration into your own PCB for a finished product, without needing a separate connector module.

Makers & Experimenters: Use with pin headers on a breadboard for fast prototyping, with the option to move to production later.

Students: An affordable entry point into Espressif's RISC-V ecosystem.

Frequently Asked Questions

What does "castellated module" mean?
It's a module with half-circle metal contacts along the edge, designed to be soldered directly (SMD reflow) onto another PCB — useful when you want to integrate the ESP32-C3 into your own finished product.

Do I need an external programmer?
No — it has a native USB serial controller, so it connects directly via USB without a separate chip like CH340 or CP2102.

Can I use it on a breadboard like other boards?
Yes — while it also supports direct soldering, it's typically supplied with pin headers for breadboard use, just like the ESP32-C3 SuperMini and XIAO C3.

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