M5Stack Stamp-C3 ESP32-C3 RISC-V IoT Module (5pcs)

Description

M5Stack Stamp-C3 is a compact ESP32-C3 development module for cost-sensitive IoT products, small controllers, and embedded wireless devices. Built around the Espressif ESP32-C3 SoC, this ESP32-C3 RISC-V module integrates a 32-bit single-core RISC-V processor running up to 160MHz, 400KB SRAM, 4MB Flash, and 2.4GHz Wi-Fi connectivity. The Stamp-C3 IoT module is delivered as a 5-piece pack, making it suitable for prototyping, pilot builds, and small production batches.

M5Stack Stamp-C3 supports multiple installation methods, including SMT, DIP, and flying-lead mounting. Its high-temperature plastic enclosure is compatible with reflow at 230 degrees C, and the board provides a 5V to 3.3V DC/DC circuit, USB Type-C, 13 GPIOs, one programmable RGB LED, one reset/debug button, and one programmable physical button. For wireless IoT designs, the ESP32-C3 RISC-V module also supports security features such as secure boot, Flash encryption, and digital signature.

Compared with larger ESP32 development boards, the Stamp-C3 IoT module focuses on a tiny footprint, easy mounting, and reliable 2.4GHz communication through its 3D antenna. M5Stack Stamp-C3 is a practical choice when a project needs Wi-Fi, GPIO expansion, USB serial programming, and ESP32-C3 RISC-V performance in a very small module format. For carrier boards and compact fixtures, the Stamp-C3 IoT module keeps the official 13-GPIO layout accessible on a 2.54mm pitch.

Features

• M5Stack Stamp-C3 compact module: tiny ESP32-C3 system board for space-constrained IoT products and embedded controllers.
• ESP32-C3 RISC-V module: 32-bit single-core RISC-V processor with main frequency up to 160MHz.
• Wireless connectivity: 2.4GHz Wi-Fi with 802.11 b/g/n support and up to 150Mbps data rate.
• Flexible mounting: supports SMT, DIP, and flying-lead installation methods.
• Reflow-compatible enclosure: high-temperature plastic shield supports reflow at 230 degrees C.
• Onboard interfaces: USB Type-C, 13 GPIOs, programmable RGB LED, reset/debug button, and user button.
• Development support: the Stamp-C3 IoT module supports Arduino IDE, ESP-IDF, and PlatformIO workflows.
• Security features: supports secure boot, Flash encryption, digital signature, and other ESP32-C3 security functions.

Specifications

Applications

• DIY prototyping: use M5Stack Stamp-C3 as a compact Wi-Fi controller for breadboard, carrier-board, and enclosure experiments.
• Industrial automation: the ESP32-C3 RISC-V module is suitable for small status nodes, sensor interfaces, and control modules.
• Smart home devices: the Stamp-C3 IoT module can power compact Wi-Fi endpoints for switches, sensors, and appliance control.
• Small production batches: the 5-piece pack is useful for repeat prototypes, fixture builds, and field test devices based on the Stamp-C3 IoT module.
• Wireless embedded systems: use M5Stack Stamp-C3 where a tiny ESP32-C3 RISC-V board with USB-C and GPIO resources is required.

Product List

Other Content

PinMap

The ESP32-C3 RISC-V module exposes 13 IO interfaces with 2.54mm pitch. The official PinMap helps map GPIOs before designing a carrier board or wiring harness.

SK6812 and Button Mapping

Schematic and Model Size

The official schematic and mechanical size drawings are useful when integrating M5Stack Stamp-C3 into a custom PCB, fixture, or enclosure.

Reflow Note

The high-temperature enclosure supports reflow at 230 degrees C, helping the Stamp-C3 IoT module fit SMT production workflows.

Resources

• M5Stack Stamp-C3 Official Documentation
• Stamp-C3 Arduino Quick Start
• Stamp-C3 Arduino Test Program
• Stamp-C3 ESP-IDF RGB LED Control Example
• ESP32-C3 Datasheet
• Stamp-C3 KiCad Library
• Stamp-C3 PcbDoc Footprint
• CH9102 Windows USB Driver
• CH9102 macOS USB Driver

FAQ

What is included with M5Stack Stamp-C3 C056-B?

The official package includes 5 x Stamp-C3 modules and 5 x high-temperature labels.

Which processor does Stamp-C3 use?

M5Stack Stamp-C3 uses the ESP32-C3 SoC with a 32-bit single-core RISC-V processor running up to 160MHz.

Does this module support Wi-Fi?

Yes. The ESP32-C3 RISC-V module supports 2.4GHz Wi-Fi with 802.11 b/g/n and up to 150Mbps data rate.

Which development platforms are supported?

The official resources cover Arduino IDE, ESP-IDF, and PlatformIO. The Stamp-C3 IoT module also has Arduino and ESP-IDF examples from M5Stack.

Can Stamp-C3 be used in reflow production?

Yes. The high-temperature plastic shield is compatible with SMT reflow at 230 degrees C, making M5Stack Stamp-C3 suitable for compact production-oriented designs.

How many GPIOs are available?

The module exposes 13 IO interfaces: G21, G20, G9, G18, G19, G1, G0, G10, G8, G7, G6, G5, and G4.