M5Stack M5Stamp C3U Mate with Pin Headers

The M5Stamp C3U is a highly compact IoT development module powered by the ESPRESSIF ESP32-C3 RISC-V microcontroller with Wi-Fi 5 (802.11 b/g/n) and BLE connectivity. Designed for smart home devices, industrial automation, and a wide range of embedded applications, it delivers reliable wireless performance in a small footprint.

Equipped with RSA-3072 secure boot and AES-128-XTS flash encryption, the M5Stamp C3U ensures high-level security for connected environments. Its durable plastic enclosure offers excellent heat resistance, making it suitable for operation in high-temperature industrial settings.

Key Features:

• Microcontroller: 32-bit RISC-V ESP32-C3, up to 160 MHz

• Memory: 400 KB internal RAM, 4 MB Flash

• Connectivity: Wi-Fi 5 (802.11 b/g/n), BLE

• Security: RSA-3072 secure boot, AES-128-XTS flash encryption

• Form Factor: Ultra-compact, ideal for embedded IoT applications

• Durability: Heat-resistant plastic casing for industrial environments

Product Features

• MULTIPLE STYLE:
  • Three types of soldering options are available (SMT, DIP, flywire);
  • High-temperature resistant plastic enclosure, Peak temperature = 230℃;
• HIGH INTEGRATION:
  • M5Stamp C3 contains 5V->3.3V DC/DC design, GPIOx14;
  • USB Type C port;
  • Programmable RGB LED x1, Reset button x1, button x1;
  • 3D antenna, providing stable and reliable wireless communication.
• DEVELOPMENT PLATFORM:
  • Arduino, ESP32-IDF (UIFlow support coming soon)

Include

• M5Stamp C3U (5pcs):
  • 5 x M5Stamp C3U
  • 5 x Heat Resistant Sticker

Application

• DIY, Prototyping
• Industrial Automation
• Smart Home
• Wearable Devices
• Medical Devices
• Consumer Electronics

Note: The newly updated C3U shares the same features as the C3, but the difference is that the M5Stamp C3U without the USB download chip and the program download method is different（(The C3U uses the ESP32-C3's built-in USB Serial for program download)）. If you are looking for a more affordable project, you can add this to your shopping list!

Program Download/Notes

Enter the program download mode operation:
1. Long press the center button (G9) of STAMP C3U under power failure conditions.
2. Connect to the computer, after the port is successfully identified, program burning.
USB CDC enabled:
By default, USB CDC is not enabled, the serial port output started by C3U will be output through UART0, if you need to output through USB, please use IDE to make it USB CDC before downloading the program option enabled. (Arduino users can enable it through Tools->USB CDC on Boot-Enabled, IDF users please refer to ESP IDF official documentation.)

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Specifications