The M5Stamp C3U is a refreshed version of the M5Stamp C3 which removes the CH9102 USB to UART converter, instead relying on the ESP32-C3’s onboard USB functionality. The rest of the M5Stamp C3U features the same functionality and components as the original M5Stamp C3.
The specifications of the M5 Stamp C3U are as follows:
- ESP32-C3FH4 32-bit single-core RISC-V processor @160 MHz, with 384KB ROM, 400KB SRAM, 8KB RTC SRAM, 4MB embedded flash
- 2.4 GHz WiFi 4, 20 MHz and 40 MHz bandwidth, IEEE 802.11 b/g/n protocol, up to 150 Mbps
- Bluetooth 5, Bluetooth mesh, with supports for 125 Kbps, 500 Kbps, 1 Mbps, 2 Mbps bitrate, long-range
- USB -C port for power and programming
- Expansion – 2.54mm pitch headers with ADC, 13x GPIO, SPI, UART, I2C, I2S, PWM, RMT, DMA, USB Serial
- 1x user button, 1x reset button, RGB Neo-Pixel
- Power: 5V @ 500mA via USB-C port
- Dimensions: 34 x 20 x 4.5mm
- Weight: 3.8 grams
If you are interested in a review of this board, take a look at our review of the M5Stamp C3! The M5Stamp C3U is available from M5Stack in individual units or packs of 5 here: https://shop.m5stack.com/products/m5stamp-c3u-5pcs