Stamp-C3U
SKU:C122-B
Description
Stamp-C3U is a cost-effective RISC-V minimum core board. It uses the ESP32-C3 main control chip from Espressif Systems. It has a built-in RISC-V 32-bit single-core processor, and the clock frequency can reach up to 160 MHz. It is equipped with a built-in 400 KB SRAM and 4MB FLASH, and also integrates 2.4 GHz Wi-Fi. This core board supports security mechanisms such as secure boot, Flash encryption, and digital signatures. Despite its small size, it is extremely powerful in functionality and can meet diverse application requirements of the Internet of Things.
Features
- Supports multiple application forms (SMT (Surface Mount Technology), DIP (Dual In-line Package), and jumper wires).
- Equipped with high-temperature plastic armor, and can withstand the SMT reflow soldering temperature of 230°C.
- Incorporates a 5V->3.3V DC/DC circuit and has 14 GPIO (General Purpose Input/Output) pins.
- Features a Type-C interface.
- Comes with one programmable RGB light, one reset button, and one button.
- Equipped with a high-performance 3D antenna, ensuring stable and reliable wireless communication quality.
- It is the minimum system board of ESP32.
Includes
- 5 x Stamp-C3U
- 5 x Heat Resistant Sticker
Applications
- DIY prototype production
- Industrial automation
- Smart home
Specifications
Specifications
| Specification | Parameter |
|---|---|
| ESP32-C3 | 32-bit RISC-V single-core processor with a maximum main frequency of 160 MHz |
| Storage | 384KB ROM, 400KB SRAM, 8KB RTC SRAM, 4MB FLASH |
| Wi-Fi | The 2.4 GHz frequency band supports bandwidths of 20 MHz and 40 MHz. It complies with the IEEE 802.11 b/g/n protocol, and the data rate can reach up to 150 Mbps |
| Input Voltage | 5V @ 500mA |
| Human-Machine Interaction | 1 programmable physical button, 1 reset and debugging button, 1 programmable RGB LED (SK6812) |
| USB Interface | 1 Type-C port |
| Antenna Type | 2.4G 3D antenna |
| Peripheral Interface Resources of the Module | ADC, GPIO, SPI, UART, I2C, I2S, PWM, RMT, DMA, USB serial port, TWAI |
| IO Interfaces (x14) | G0, G1, G3, G4, G5, G6, G7, G8, G9, G10, G18, G19, G21, G22 |
| Spacing of IO Interfaces | 2.54mm |
| Specification of Fixing Screws | M2 x 4 Countersunk Hex Socket Head Cap Screw with Machine Thread |
| Product Size | 34.0 x 20.0 x 4.6mm |
| Product Weight | 19.9g |
| Packaging Size | 138.0 x 93.0 x 5.6mm |
| Gross Weight | 22.8g |
Learn
1. Long-press the central button (G9) of the Stamp-C3U when the power is off.
2. Connect it to the computer. After the port is successfully recognized, perform the program burning.
Enabling USB CDC:
By default, the USB CDC is in the disabled state. The serial port output when the C3U starts will be output through UART0. If you need to output through USB, please enable the USB CDC option through the IDE before downloading the program. (Arduino users can enable it through Tools->USB CDC on Boot-Enabled, and IDF users please refer to the official documentation of ESP IDF.)
The shell supports the reflow soldering temperature curve.
Schematics
PinMap
SK6812，Button
| ESP32 | G2 | G9 |
|---|---|---|
| SK6812 | DI | / |
| Button | / | SW |
Model Size
PCB
Datasheets
Softwares
ESP-IDF
Video
Product Comparison
The differences between C3U and C3 are as follows: The Stamp-C3U has removed the USB download chip and instead uses the built-in USB Serial of the ESP32-C3 for program downloading.
| Model | Main Control | Number of IOs | Button IO | USB Download Chip | USB Interface Functions |
|---|---|---|---|---|---|
| Stamp-C3 | ESP32-C3 | 13 | G3 | CH9102 | Download / Serial |
| Stamp-C3U | ESP32-C3 | 14 | G9 | / | Download / JTAG / CDC Serial |
