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)

Asymmetric Multiprocessing (AMP)

ESP32S3-DevKitM allows 2 different applications to be executed in ESP32-S3 SoC. Due to its dual-core architecture, each core can be enabled to execute customized tasks in stand-alone mode and/or exchanging data over OpenAMP framework. See IPC Samples folder as code reference.

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

TWAI/CAN

on-chip

can

ADC

on-chip

adc

Timers

on-chip

counter

Watchdog

on-chip

watchdog

TRNG

on-chip

entropy

LEDC

on-chip

pwm

MCPWM

on-chip

pwm

PCNT

on-chip

qdec

GDMA

on-chip

dma

USB-CDC

on-chip

serial

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

Simple boot

The board could be loaded using the single binary image, without 2nd stage bootloader. It is the default option when building the application without additional configuration.

Note

Simple boot does not provide any security features nor OTA updates.

MCUboot bootloader

User may choose to use MCUboot bootloader instead. In that case the bootloader must be build (and flash) at least once.

There are two options to be used when building an application:

  1. Sysbuild

  2. Manual build

Note

User can select the MCUboot bootloader by adding the following line to the board default configuration file. ` CONFIG_BOOTLOADER_MCUBOOT=y `

Sysbuild

The sysbuild makes possible to build and flash all necessary images needed to bootstrap the board with the ESP32 SoC.

To build the sample application using sysbuild use the command:

west build -b esp32s3_devkitm --sysbuild samples/hello_world

By default, the ESP32 sysbuild creates bootloader (MCUboot) and application images. But it can be configured to create other kind of images.

Build directory structure created by sysbuild is different from traditional Zephyr build. Output is structured by the domain subdirectories:

build/
├── hello_world
│   └── zephyr
│       ├── zephyr.elf
│       └── zephyr.bin
├── mcuboot
│    └── zephyr
│       ├── zephyr.elf
│       └── zephyr.bin
└── domains.yaml

Note

With --sysbuild option the bootloader will be re-build and re-flash every time the pristine build is used.

For more information about the system build please read the Sysbuild (System build) documentation.

Manual build

During the development cycle, it is intended to build & flash as quickly possible. For that reason, images can be build one at a time using traditional build.

The instructions following are relevant for both manual build and sysbuild. The only difference is the structure of the build directory.

Note

Remember that bootloader (MCUboot) needs to be flash at least once.

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/esp32s3/procpu 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/esp32s3/procpu 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

ESP32-S3 support on OpenOCD is available upstream as of version 0.12.0. Download and install OpenOCD from OpenOCD.

ESP32-S3 has a built-in JTAG circuitry and can be debugged without any additional chip. Only an USB cable connected to the D+/D- pins is necessary.

Further documentation can be obtained from the SoC vendor in JTAG debugging for ESP32-S3.

Here is an example for building the Hello World application.

# From the root of the zephyr repository
west build -b esp32s3_devkitm/esp32s3/procpu samples/hello_world
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/esp32s3/procpu samples/hello_world
west debug

References