Seeed XIAO ESP32C3

The Seeed XIAO ESP32C3 is an IoT mini development board based on the Espressif ESP32-C3 WiFi/Bluetooth dual-mode chip.

Interfaces

Pins

Machine Package Docs

Documentation for the machine package for the Seeed XIAO ESP32C3

Flashing

CLI Flashing

• Flash your TinyGo program to the board using this command:

  tinygo flash -target=xiao-esp32c3 [PATH TO YOUR PROGRAM]
  

• The XIAO ESP32C3 board should restart and then begin running your program.

Flashing and Building

CLI Building

To build your TinyGo program without flashing it to the board, you can use the following command:

tinygo build -o blinky.elf -size=short -gc=leaking --panic=trap -target=xiao-esp32c3 [PATH TO YOUR PROGRAM]

This command compiles your program and creates an ELF file.

CLI Flashing

To compile and flash your program to the board in one step, use:

tinygo flash -port /dev/ttyUSB0 -target=xiao-esp32c3 [PATH TO YOUR PROGRAM]

This command is similar to the build command, but it also flashes the program to the board.

Notes

• The XIAO ESP32C3 supports both WiFi and Bluetooth functionality. However, TinyGo’s support for Bluetooth on this board may be limited or in development.
• The USB port on the XIAO ESP32C3 can be used as a serial port for debugging and communication.
• When using WiFi functionality, be mindful of power consumption as it can significantly affect battery life in portable projects.
• The board uses the build tag xiao_esp32c3 for conditional compilation.
• UART: UART_TX_PIN is GPIO21 (D6) and UART_RX_PIN is GPIO20 (D7).
• I2C: SDA_PIN is GPIO6 (D4) and SCL_PIN is GPIO7 (D5).
• SPI: SPI_SCK_PIN is GPIO8 (D8), SPI_SDI_PIN is GPIO9 (D9), and SPI_SDO_PIN is GPIO10 (D10).
• Analog pins (ADC): A0-A3 correspond to D0-D3 respectively.

Example Usage

Here’s a simple example that demonstrates how to use the UART (serial communication) on the XIAO ESP32C3

package main

import (
    "machine"
    "time"
    "fmt"
)

func main() {
    uart := machine.UART0
    uart.Configure(machine.UARTConfig{
        BaudRate: 115200,
        TX:       machine.D6, // UART_TX_PIN for XIAO ESP32C3
        RX:       machine.D7, // UART_RX_PIN for XIAO ESP32C3
    })

    for {
        fmt.Fprintln(uart, "Hello from Seeedstudio")
        time.Sleep(time.Second)
    }
}

To compile and flash this program:

tinygo flash -port /dev/ttyUSB0 -target=xiao-esp32c3 uart.go