Stamp-C3U Mate

SKU:K122

Description

Stamp-C3U Mate is an accessory kit for the Stamp-C3U minimum core board.
The kit includes a Stamp-C3U along with female headers, male headers, a HY2.0-4P female socket and other practical accessories, making it easy to integrate the Stamp-C3U into your circuit quickly.

Stamp-C3U is a cost-effective RISC-V minimum core board powered by the ESP32-C3 SoC, which integrates a 32-bit single-core RISC-V processor running at up to 160 MHz. It comes with 400 KB SRAM + 4 MB Flash and built-in 2.4 GHz Wi-Fi. The module supports secure boot, flash encryption and digital signature. Despite its small size, it offers powerful features to meet a wide range of IoT application requirements.

Features

Supports multiple mounting methods (SMT, DIP, flying leads)
High-temperature plastic armor, SMT reflow up to 230 °C
On-board 5 V → 3.3 V DC/DC circuit, 14 × GPIO
USB Type-C connector
1 × Programmable RGB LED, 1 × Reset button, 1 × User button
High-performance 3D antenna for stable and reliable wireless communication
ESP32 minimum system board
Development Platform
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 × Stamp-C3U
1 × High-temperature Sticker
2 × 2.54-12P Female Header
2 × 2.54-10P Male Header
2 × HY2.0-4P Female Socket (90°)
1 × Hex Key L-Shape 1.5 mm (For M2 Screw)

Applications

DIY & prototyping
Industrial automation
Smart home

Specifications

Specification	Parameter
SoC	ESP32-C3@32-bit RISC-V Single-Core Processor, Main Frequency up to 160MHz
Flash	4MB
SRAM	400KB
ROM	384KB
RTC SRAM	8KB
Wi-Fi	2.4 GHz Wi-Fi (supports 20/40MHz bandwidth, 802.11 b/g/n, up to 150Mbps)
Input Voltage	5V@500mA
Human-Machine Interaction	Programmable Physical Button x 1, Reset/Debug Button x 1, Programmable RGB LED (SK6812) x 1
USB Interface	USB Type-C x 1
Antenna Type	2.4G 3D Antenna
Module Peripheral Interface Resources	ADC, GPIO, SPI, UART, I2C, I2S, PWM, RMT, DMA, USB Serial, TWAI
IO Interfaces x14	G0, G1, G3, G4, G5, G6, G7, G8, G9, G10, G18, G19, G21, G22
IO Interface Pitch	2.54mm
Mounting Screw Specification	M2 x 4 Countersunk Hex Socket Machine Screw
Product Size	34.0 x 20.0 x 4.6mm
Product Weight	3.5g
Package Size	138.0 x 93.0 x 5.6mm
Gross Weight	9.8g

Learn

Enter Download Mode Operation

1. While powered off, press and hold the center button (G9) on the Stamp-C3U. 2. Connect to the PC; once the port is recognized, flash the firmware.
USB CDC Enable: By default, USB CDC is disabled. Serial output on boot is provided via UART0. To output via USB, enable USB CDC in the IDE before flashing. (Arduino users: Tools → USB CDC on Boot → Enabled. For IDF users, please refer to the official ESP-IDF documentation.)

Reflow Soldering Temperature Curve for the Shell

Schematics

PinMap

SK6812, Button

ESP32-C3	G2	G9
SK6812	DI	/
Button	/	SW

Model Size

PCB

LCEDA Stamp-C3U Component

Datasheets

ESP32-C3

Softwares

ESP-IDF

Stamp-C3U RGB LED Example

Video

Product Comparison

The difference between C3U and C3 is that STAMP-C3U removes the USB download chip and uses the ESP32-C3’s built-in USB Serial for programming.

Model	SoC	IO Count	Button IO	USB Download Chip	USB Interface Function
STAMP-C3	ESP32-C3	13	G3	CH9102	Download / Serial
STAMP-C3U	ESP32-C3	14	G9	/	Download / JTAG / CDC Serial