ESP32 - Core board

The esp32-coreboard-v2 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	YES
USBDevice	NO	NO
WiFi	YES	YES
Bluetooth	YES	YES

Pins

Pin	Hardware pin	Alternative names
`CLK`	`GPIO6`
`CMD`	`GPIO11`
`IO0`	`GPIO0`	`PWM1_PIN`
`IO1`	`GPIO1`	`TXD`, `UART_TX_PIN`
`IO2`	`GPIO2`	`LED`, `PWM0_PIN`
`IO3`	`GPIO3`	`RXD`, `UART_RX_PIN`
`IO4`	`GPIO4`	`PWM2_PIN`
`IO5`	`GPIO5`	`SPI0_CS0_PIN`
`IO9`	`GPIO9`	`SD2`, `UART1_TX_PIN`
`IO10`	`GPIO10`	`SD3`, `UART1_RX_PIN`
`IO16`	`GPIO16`
`IO17`	`GPIO17`
`IO18`	`GPIO18`	`SPI0_SCK_PIN`
`IO19`	`GPIO19`	`SPI0_SDI_PIN`
`IO21`	`GPIO21`	`SDA_PIN`
`IO22`	`GPIO22`	`SCL_PIN`
`IO23`	`GPIO23`	`SPI0_SDO_PIN`
`IO25`	`GPIO25`
`IO26`	`GPIO26`
`IO27`	`GPIO27`
`IO32`	`GPIO32`
`IO33`	`GPIO33`
`IO34`	`GPIO34`	`ADC0`
`IO35`	`GPIO35`	`ADC1`
`IO36`	`GPIO36`	`SVP`, `ADC2`
`IO39`	`GPIO39`	`SVN`, `ADC3`
`SD0`	`GPIO7`
`SD1`	`GPIO8`
`TCK`	`GPIO13`
`TD0`	`GPIO15`
`TDI`	`GPIO12`
`TMS`	`GPIO14`

Machine Package Docs

Documentation for the machine package for the ESP32 Core board v2

Flashing

Flash your TinyGo program to the board using this command:

tinygo flash -target=esp32-coreboard-v2 [PATH TO YOUR PROGRAM]

The ESP32 board should restart and then begin running your program.

Troubleshooting

Goes here

Notes

WiFi

You can use the onboard wireless chip for WiFi using the espradio package.

For more information, see https://github.com/tinygo-org/espradio

Bluetooth

You can use the onboard wireless chip for Bluetooth Low Energy using the bluetooth package.

For more information, see https://github.com/tinygo-org/bluetooth

On the ESP32, Bluetooth needs 64KB of RAM. TinyGo only reserves it in programs that use Bluetooth.

Last modified October 28, 2026: docs: show WiFi and Bluetooth support for ESP32 boards (8cbe676)