SeeedStudio XIAO ESP32-C3 Module (External Antenna)

Another module from the SeeedStudio XIAO series in our offer. This time it’s a module based on the ESP32-C3.

As usual for the XIAO series, the dimensions are tiny — just 21 × 17.8 mm. The module also includes a LiPo battery charging circuit and a USB-C connector.

The processor itself is the ESP32-C3, based on the RISC-V architecture: 32-bit, 160 MHz, with 400 kB RAM and 4 MB Flash.

The board provides a connector for an external WiFi/Bluetooth antenna and does not include a PCB antenna.

Do not start Bluetooth or WiFi on the module without a connected antenna. Doing so may damage the RF circuitry.

Pinout:

The module offers the following interfaces: 1 × UART, 1 × IIC, 1 × SPI, 11 × GPIO (PWM), 4 × ADC.

WARNING
All pins operate with 3.3 V logic. Applying a higher voltage to any pin may permanently damage the module.

Like most modules in the XIAO series, this board is designed for surface mounting. The bottom side of the PCB has no components and features castellated edges for easy soldering onto another board.

Specification:

• Size: 21 × 17.8 mm
• Processor: ESP32-C3, 400 kB RAM, 4 MB Flash, 160 MHz
• Interfaces: 1 × UART, 1 × IIC, 1 × SPI, 11 × GPIO (PWM), 4 × ADC
• Power supply:
  • via USB: 5 V
  • via BAT pads - max 4.2V

Procesor specification as read by esptool

esptool v5.1.0
Connected to ESP32-C3 on /dev/ttyACM0:
Chip type:          ESP32-C3 (QFN32) (revision v0.4)
Features:           Wi-Fi, BT 5 (LE), Single Core, 160MHz, Embedded Flash 4MB (XMC)
Crystal frequency:  40MHz
USB mode:           USB-Serial/JTAG