M5Stack Core2

The m5stack-core2 is a development board based on the Espressif ESP32 a powerful chip that is used on many different board mostly because of the built-in radio that can be used for WiFi or Bluetooth wireless connections.

Interfaces

Interface	Hardware Supported	TinyGo Support
GPIO	YES	YES
UART	YES	YES
SPI	YES	YES
I2C	YES	YES
ADC	YES	YES
PWM	YES	Not yet
USBDevice	NO	NO
WiFi	YES	Not Yet
Bluetooth	YES	Not yet

Pins

Pin	Hardware pin	Alternative names
`IO0`	`GPIO0`
`IO1`	`GPIO1`	`UART0_TX_PIN`, `UART_TX_PIN`
`IO2`	`GPIO2`
`IO3`	`GPIO3`	`UART0_RX_PIN`, `UART_RX_PIN`
`IO4`	`GPIO4`	`SDCARD_SS_PIN`
`IO5`	`GPIO5`	`SPI0_CS0_PIN`, `LCD_SS_PIN`
`IO6`	`GPIO6`
`IO7`	`GPIO7`
`IO8`	`GPIO8`
`IO9`	`GPIO9`
`IO10`	`GPIO10`
`IO11`	`GPIO11`
`IO12`	`GPIO12`
`IO13`	`GPIO13`	`UART1_RX_PIN`
`IO14`	`GPIO14`	`UART1_TX_PIN`
`IO15`	`GPIO15`	`LCD_DC_PIN`
`IO16`	`GPIO16`
`IO17`	`GPIO17`
`IO18`	`GPIO18`	`SPI0_SCK_PIN`, `LCD_SCK_PIN`, `SDCARD_SCK_PIN`
`IO19`	`GPIO19`
`IO21`	`GPIO21`	`SDA0_PIN`
`IO22`	`GPIO22`	`SCL0_PIN`
`IO23`	`GPIO23`	`SPI0_SDO_PIN`, `LCD_SDO_PIN`, `SDCARD_SDO_PIN`
`IO25`	`GPIO25`	`DAC1`
`IO26`	`GPIO26`	`DAC2`
`IO27`	`GPIO27`
`IO32`	`GPIO32`	`SDA1_PIN`, `SDA_PIN`
`IO33`	`GPIO33`	`SCL1_PIN`, `SCL_PIN`
`IO34`	`GPIO34`
`IO35`	`GPIO35`	`ADC1`
`IO36`	`GPIO36`	`ADC2`
`IO38`	`GPIO38`	`SPI0_SDI_PIN`, `LCD_SDI_PIN`, `SDCARD_SDI_PIN`
`IO39`	`GPIO39`

Pins

Pin	Hardware pin	Alternative names
`IO0`	`GPIO0`
`IO1`	`GPIO1`	`UART0_TX_PIN`, `UART_TX_PIN`
`IO2`	`GPIO2`
`IO3`	`GPIO3`	`UART0_RX_PIN`, `UART_RX_PIN`
`IO4`	`GPIO4`	`SDCARD_SS_PIN`
`IO5`	`GPIO5`	`SPI0_CS0_PIN`, `LCD_SS_PIN`
`IO6`	`GPIO6`
`IO7`	`GPIO7`
`IO8`	`GPIO8`
`IO9`	`GPIO9`
`IO10`	`GPIO10`
`IO11`	`GPIO11`
`IO12`	`GPIO12`
`IO13`	`GPIO13`	`UART1_RX_PIN`
`IO14`	`GPIO14`	`UART1_TX_PIN`
`IO15`	`GPIO15`	`LCD_DC_PIN`
`IO16`	`GPIO16`
`IO17`	`GPIO17`
`IO18`	`GPIO18`	`SPI0_SCK_PIN`, `LCD_SCK_PIN`, `SDCARD_SCK_PIN`
`IO19`	`GPIO19`
`IO21`	`GPIO21`	`SDA0_PIN`
`IO22`	`GPIO22`	`SCL0_PIN`
`IO23`	`GPIO23`	`SPI0_SDO_PIN`, `LCD_SDO_PIN`, `SDCARD_SDO_PIN`
`IO25`	`GPIO25`	`DAC1`
`IO26`	`GPIO26`	`DAC2`
`IO27`	`GPIO27`
`IO32`	`GPIO32`	`SDA1_PIN`, `SDA_PIN`
`IO33`	`GPIO33`	`SCL1_PIN`, `SCL_PIN`
`IO34`	`GPIO34`
`IO35`	`GPIO35`	`ADC1`
`IO36`	`GPIO36`	`ADC2`
`IO38`	`GPIO38`	`SPI0_SDI_PIN`, `LCD_SDI_PIN`, `SDCARD_SDI_PIN`
`IO39`	`GPIO39`

Machine Package Docs

Documentation for the machine package for the M5Stack Core2

Flashing

CLI Flashing on Linux

You need to install the esptool flashing tool:

https://github.com/espressif/esptool#easy-installation

Now you should be able to flash your board as follows:

Plug your ESP32 board into your computer’s USB port.
Build and flash your TinyGo code using the tinygo flash command. This command flashes the ESP32 with the serial example:
```
tinygo flash -target=m5stack-core2 -port=/dev/ttyUSB0 examples/serial
```
The ESP32 board should restart and then begin running your program.

CLI Flashing on macOS

You need to install the esptool flashing tool:

https://github.com/espressif/esptool#easy-installation

Now you should be able to flash your board as follows:

Plug your ESP32 board into your computer’s USB port.
Build and flash your TinyGo code using the tinygo flash command. This command flashes the ESP32 with the serial example:
```
tinygo flash -target=m5stack-core2 examples/serial
```
The ESP32 board should restart and then begin running your program.

CLI Flashing on Windows

You need to install the esptool flashing tool:

https://github.com/espressif/esptool#easy-installation

Now you should be able to flash your board as follows:

Plug your ESP32 board into your computer’s USB port.
Build and flash your TinyGo code using the tinygo flash command. This command flashes the ESP32 with the serial example:
```
tinygo flash -target=m5stack-core2 examples/serial
```
The ESP32 board should restart and then begin running your program.

Troubleshooting

Goes here

Notes

Goes here

Last modified March 19, 2025: content: regenerate reference docs for v0.37.0 (c29510c)