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 single-core RISC-V processor, up to 160 MHz
Memory	384 KB ROM, 400 KB SRAM, 8 KB RTC SRAM, 4 MB Flash
Wi-Fi	2.4 GHz band, 20 MHz / 40 MHz bandwidth, IEEE 802.11 b/g/n, data rate up to 150 Mbps
Input Voltage	5 V @ 500 mA
HMI	1 × Programmable button, 1 × Reset button, 1 × Programmable RGB LED (SK6812)
USB Interface	1 × Type-C
Antenna Type	2.4 G 3D antenna
Peripheral Interface	ADC, GPIO, SPI, UART, I2C, I2S, PWM, RMT, DMA, USB CDC/Serial, TWAI
IO (14 pins)	G0, G1, G3, G4, G5, G6, G7, G8, G9, G10, G18, G19, G21, G22
IO Pitch	2.54 mm
Mounting Screws	M2 × 4 Countersunk Hex Socket Machine Screws
Product Size	34.0 × 20.0 × 4.6 mm
Product Weight	3.5 g
Package Size	138.0 × 93.0 × 5.6 mm
Gross Weight	9.8 g

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