Stamp-C3U
SKU:C122-B, K122
Quick-Start
Description
The newly M5Stamp C3U featuring ESPRESSIF ESP32-C3 RISC-V MCU, with Wi-Fi 5 (LE) connectivity, applicable for home appliances and Industrial Automation. By combining RSA-3072-based secure boot and the AES-128-XTS-based flash encryption. The compact size and powerful functions, make it applicable for multiple IoT scenarios.
The M5Stamp C3U is based on 32-bit RISC-V micro controller, and operates at a maximum clock frequency of 160 MHz. With 400 KB of internal RAM and 4 MB Flash, it can facilitate many different use cases, involving connected devices. The M5Stamp C3U provides, Furthermore, the exceptional heat resistance plastic enclosure is sustained at a higher operating temperature.
Features
MULTIPLE STYLE:
- Three types soldering options are available (SMT, DIP, fly wire);
- 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)
Applications
- DIY, Prototyping
- Industrial Automation
- Smart Home
- Wearable Devices
- Medical Devices
- Consumer Electronics
Note: The newly updated C3U shares the same features as C3, but the difference is that 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
1. Long press the center button (G9) of STAMP C3U under power failure condition.
2. Connect to the computer while holding the button, 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.)product comparison
| Model | Master | IO quantity | Button IO | USB chip | USB interface function |
|---|---|---|---|---|---|
| STAMP-C3 | ESP32-C3 | 13 | G3 | CH9102 | Download / Serial |
| STAMP-C3U | ESP32-C3 | 14 | G9 | / | Download / JTAG / CDC Serial |
Specifications
| Specifications | Parameters |
|---|---|
| ESP32-C3 | 32bit RISC-V single-core processor, clocked at 160 MHz |
| Storage | 384KB ROM, 400KB SRAM, 8KB RTC SRAM, 4MB FLASH |
| Wi-Fi | 2.4 GHz band supports 20 MHz and 40 MHz bandwidth, IEEE 802.11 b/g/n protocol, data rate up to 150 Mbps |
| Input voltage | 5V @ 500mA |
| HMI | Programmable physical button x 1, reset debugging button x 1, programmable RGB LED (SK6812) x 1 |
| USB interface | TypeC x1 |
| Antenna Type | 2.4G 3D Antenna |
| Module peripheral interface resources | ADC, GPIO, SPI, UART, I2C, I2S, PWM, RMT, DMA, USB serial port, TWAI |
| IO interface x14 | G0, G1, G3, G4, G5, G6, G7, G8, G9, G10, G18, G19, G21, G22 |
| IO interface spacing | 2.54mm |
| Fixing screw specifications | M2*4 countersunk head hexagon socket mechanical teeth |
| Net weight | 3.8g |
| Product size | 34 * 20 * 4.6mm |
| Packing size | 85*55mm sealing bag (translucent) |
Include
- Purchase link
- M5Stamp C3U (5pcs):
- 5 x M5Stamp C3U
- 5 x Heat Resistant Sticker
- Purchase link
- M5Stamp C3U Mate:
- 1 x M5Stamp C3U
- 1 x Heat Resistant Sticker
- 2 x 2.54-12P female headers
- 2 x 2.54-10P pin headers
- 2 x 90° HY2.0-4P terminals
- 1 x 1.5mm hex key
PinMap
SK6812 (RGB LED) and Button
| ESP32 | GPIO2 | GPIO9 |
|---|---|---|
| SK6812 | DI | / |
| Button | / | SW |
Schematic
Module size
- C3&C3U
The shell supports Reflow Profile
Related Links
Datasheet
PCB
Example
ESP-IDF
Video
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