This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

ESP32S3-DevKitM

Overview

The ESP32-S3-DevKitM is an entry-level development board equipped with either ESP32-S3-MINI-1 or ESP32-S3-MINI-1U, a module named for its small size. This board integrates complete Wi-Fi and Bluetooth Low Energy functions. For more information, check ESP32-S3 DevKitM

Hardware

ESP32-S3 is a low-power MCU-based system on a chip (SoC) with integrated 2.4 GHz Wi-Fi and Bluetooth® Low Energy (Bluetooth LE). It consists of high-performance dual-core microprocessor (Xtensa® 32-bit LX7), a low power coprocessor, a Wi-Fi baseband, a Bluetooth LE baseband, RF module, and numerous peripherals.

ESP32-S3 DevKitM includes the following features:

  • Dual core 32-bit Xtensa Microprocessor (Tensilica LX7), running up to 240MHz

  • Additional vector instructions support for AI acceleration

  • 512KB of SRAM

  • 384KB of ROM

  • Wi-Fi 802.11b/g/n

  • Bluetooth LE 5.0 with long-range support and up to 2Mbps data rate

Digital interfaces:

  • 45 programmable GPIOs

  • 4x SPI

  • 1x LCD interface (8-bit ~16-bit parallel RGB, I8080 and MOTO6800), supporting conversion between RGB565, YUV422, YUV420 and YUV411

  • 1x DVP 8-bit ~16-bit camera interface

  • 3x UART

  • 2x I2C

  • 2x I2S

  • 1x RMT (TX/RX)

  • 1x pulse counter

  • LED PWM controller, up to 8 channels

  • 1x full-speed USB OTG

  • 1x USB Serial/JTAG controller

  • 2x MCPWM

  • 1x SDIO host controller with 2 slots

  • General DMA controller (GDMA), with 5 transmit channels and 5 receive channels

  • 1x TWAI® controller, compatible with ISO 11898-1 (CAN Specification 2.0)

  • Addressable RGB LED, driven by GPIO48.

Analog interfaces:

  • 2x 12-bit SAR ADCs, up to 20 channels

  • 1x temperature sensor

  • 14x touch sensing IOs

Timers:

  • 4x 54-bit general-purpose timers

  • 1x 52-bit system timer

  • 3x watchdog timers

Low Power:

  • Power Management Unit with five power modes

  • Ultra-Low-Power (ULP) coprocessors: ULP-RISC-V and ULP-FSM

Security:

  • Secure boot

  • Flash encryption

  • 4-Kbit OTP, up to 1792 bits for users

  • Cryptographic hardware acceleration: (AES-128/256, Hash, RSA, RNG, HMAC, Digital signature)

For more information, check the datasheet at ESP32-S3 Datasheet.

Supported Features

Current Zephyr’s ESP32-S3-DevKitM board supports the following features:

Interface

Controller

Driver/Component

UART

on-chip

serial port

GPIO

on-chip

gpio

PINMUX

on-chip

pinmux

USB-JTAG

on-chip

hardware interface

SPI Master

on-chip

spi

Timers

on-chip

counter

Watchdog

on-chip

watchdog

TRNG

on-chip

entropy

LEDC

on-chip

pwm

Prerequisites

Espressif HAL requires WiFi and Bluetooth binary blobs in order work. Run the command below to retrieve those files.

west blobs fetch hal_espressif

Note

It is recommended running the command above after west update.

Building & Flashing

Build and flash applications as usual (see Building an Application and Run an Application for more details).

# From the root of the zephyr repository
west build -b esp32s3_devkitm samples/hello_world

The usual flash target will work with the esp32s3_devkitm board configuration. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b esp32s3_devkitm samples/hello_world
west flash

Open the serial monitor using the following command:

west espressif monitor

After the board has automatically reset and booted, you should see the following message in the monitor:

***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
Hello World! esp32s3_devkitm

Debugging

As with much custom hardware, the ESP32 modules require patches to OpenOCD that are not upstreamed yet. Espressif maintains their own fork of the project. The custom OpenOCD can be obtained at OpenOCD ESP32

The Zephyr SDK uses a bundled version of OpenOCD by default. You can overwrite that behavior by adding the -DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts> parameter when building.

Here is an example for building the Hello World application.

# From the root of the zephyr repository
west build -b esp32s3_devkitm samples/hello_world -- -DOPENOCD=<path/to/bin/openocd> -DOPENOCD_DEFAULT_PATH=<path/to/openocd/share/openocd/scripts>
west flash

You can debug an application in the usual way. Here is an example for the Hello World application.

# From the root of the zephyr repository
west build -b esp32s3_devkitm samples/hello_world
west debug

References