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Seeed Studio XIAO ESP32C3 is an IoT mini development board based on the Espressif ESP32-C3 WiFi/Bluetooth dual-mode chip, featuring a 32-bit RISC-V CPU that delivers powerful computing performance with its efficient architecture. It has excellent radio frequency performance, supporting IEEE 802.11 b/g/n WiFi, and Bluetooth 5 (BLE) protocols. This board comes included with an external antenna to increase the signal strength for your wireless applications. It also has a small and exquisite form-factor combined with a single-sided surface-mountable design. It is equipped with rich interfaces and has 11 digital I/O that can be used as PWM pins and 3 analog I/O that can be used as ADC pins. It supports four serial interfaces such as UART, I2C and SPI. There is also a small reset button and a bootloader mode button on the board. XIAO ESP32C3 is fully compatible with the Grove Shield for Seeeduino XIAO and Seeeduino XIAO Expansion board except for the Seeeduino XIAO Expansion board, the SWD spring contacts on the board will not be compatible.
Processor
ESP32-C3 32-bit RISC-V @160MHz
SAMD21 M0+@48MHz
RP2040 Dual-core M0+@133Mhz
nRF52840 M4F@64MHz
nRF52840 M4F@64MHz
Wireless Connectivity
WiFi and Bluetooth 5 (BLE)
N/A
N/A
Bluetooth 5.0/BLE/NFC
Bluetooth 5.0/BLE/NFC
Memory
400KB SRAM, 4MB onboard Flash
32KB SRAM 256KB FLASH
264KB SRAM 2MB onboard Flash
256KB RAM, 1MB Flash 2MB onboard Flash
256KB RAM,1MB Flash 2MB onboard Flash
Built-in Sensors
N/A
N/A
N/A
N/A
6 DOF IMU (LSM6DS3TR-C), PDM Microphone
Interfaces
I2C/UART/SPI
I2C/UART/SPI
I2C/UART/SPI
I2C/UART/SPI
I2C/UART/SPI
PWM/Analog Pins
11/4
11/11
11/4
11/6
11/6
Onboard Buttons
Reset/ Boot Button
N/A
Reset/ Boot Button
Reset Button
Reset Button
Onboard LEDs
Charge LED
N/A
Full-color RGB/ 3-in-one LED
3-in-one LED/ Charge LED
3-in-one LED/ Charge LED
Battery Charge Chip
ETA4054S2F
N/A
N/A
BQ25101
BQ25101
Programming Languages
Arduino/ MicroPython
Arduino/ CircuitPython
Arduino/ MicroPython/ CircuitPython
5V - This is 5v out from the USB port. You can also use this as a voltage input but you must have some sort of diode (schottky, signal, power) between your external power source and this pin with anode to battery, cathode to 5V pin.
3V3 - This is the regulated output from the onboard regulator. You can draw 700mA
GND - Power/data/signal ground
According to the chip manual of ESP32C3, GPIO2, GPIO8 and GPIO9 in the chip are Strapping Pins, the high and low level configurations of these pins may allow the chip to enter into different Boot modes, please pay attention to this point when you use these pins, otherwise it may prevent your XIAO from uploading or executing the program all the time.
With regard to the features highlighted above, XIAO ESP32C3 is positioned as a high-performance, low-power, cost-effective IoT mini development board, suitable for low-power IoT applications and wireless wearable applications.
