ESP32-S2 Human Machine Interface Dev Kit

by Espressif

Image of Board

Espressif’s ESP32-S2 Human Machine Interface Dev Kit 1 (ESP32-S2-HMI-DevKit-1) has been specifically designed for human-machine interfaces in smart-home automation controllers, smart speakers with display, smart alarm clocks, etc.

ESP32-S2-HMI-DevKit-1 is powered by the ESP32-S2-WROVER module, which supports a 4.3” LCD screen. The development board can have an optional 1,950mAh rechargeable lithium battery installed. There’s lots of peripheral interfaces such as an extra USB serial programming/UART port, SPI, TWAI, I2C, and an SD card. It supports various sensors and functions such as audio playback and recording. Additionally, this development kit supports rapid secondary development, allowing developers to take advantage of the kit’s various onboard resources and expansion interfaces.

Please note this is an advanced development kit, for use with the ‘raw’ Espressif ESP IDF. For example, there isn’t CircuitPython or Arduino support for the display at this time. We’re stocking this because we think its a great dev board if you want to implement support for this hardware or play with display interfaces and the ESP32-S2

ESP32-S2-HMI-DevKit-1 Specifications:

  • Wireless microcontoller module: ESP32-S2-WROVER module with ESP32-S2 Xtensa single-core 32-bit LX7 microprocessor, up to 240 MHz with 128 KB ROM, 320 KB SRAM, WiFi 4 connectivity, 4MB flash, 2MB PSRAM
  • Storage: MicroSD card slot
  • Display: 4.3” display with 800×480 resolution connected with 16-bit interface plus I2C capacitive touch panel overlay
  • Display interface: 16-bit, 20 MHz, 8080 parallel communication
  • Audio: Audio amplifier, built-in microphone, speaker connector
  • USB: 1x USB-C OTG (DFU/CDC) port, 1x USB-C debug port
  • Expansion: SPI header, TWAI (2-wire automotive interface)/CAN header, I2C header, UART/Prog header
  • Sensors: 3-axis accelerometer, 3-axis gyroscope, ambient light sensor, temperature and humidity sensors
  • Miscellaneous: Programmable RGB LEDs, wakeup and reset buttons, IR transmitter
  • Power Supply: 5V and 3.3V power headers
  • Optional Rechargeable Battery: 1,950 mAh Li-ion battery cutout and connector

Please note, Espressif is not shipping this product with a battery installed. An off-the-shelf iPhone 5-compatible battery can be purchased and installed by the end user.

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CircuitPython 7.0.0-rc.3

This is the latest unstable release of CircuitPython that will work with the ESP32-S2 Human Machine Interface Dev Kit.

Unstable builds have the latest features but are more likely to have critical bugs.

Release Notes for 7.0.0-rc.3

Built-in modules available: _bleio, adafruit_bus_device, adafruit_pixelbuf, aesio, alarm, analogio, atexit, audiobusio, audiocore, audiomixer, binascii, bitbangio, bitmaptools, board, busio, canio, countio, digitalio, displayio, dualbank, errno, fontio, framebufferio, frequencyio, getpass, imagecapture, ipaddress, json, keypad, math, microcontroller, msgpack, neopixel_write, nvm, onewireio, os, paralleldisplay, ps2io, pulseio, pwmio, qrio, rainbowio, random, re, rgbmatrix, rotaryio, rtc, sdcardio, sharpdisplay, socketpool, ssl, storage, struct, supervisor, synthio, terminalio, time, touchio, traceback, ulab, usb_cdc, usb_hid, usb_midi, vectorio, watchdog, wifi

Absolute Newest

Every time we commit new code to CircuitPython we automatically build binaries for each board and language. The binaries are stored on Amazon S3, organized by board, and then by language. Try them if you want the absolute latest and are feeling daring or want to see if a problem has been fixed.

Past Releases

All previous releases are listed on GitHub, with release notes, and are available for download from Amazon S3. They are handy for testing, but otherwise we recommend using the latest stable release. Some older GitHub release pages include the same binaries for downloading. But we have discontinued including binaries as assets on newer release pages because of the large number of files for each release.

BROWSE GITHUB

Install/Repair UF2 Bootloader

Latest version: 0.5.2

The bootloader allows you to load CircuitPython, Makecode, and Arduino programs. The bootloader is not CircuitPython.

It is not necessary to reinstall the bootloader unless a BOOT drive is not visible when in UF2 bootloader mode (FTHRS2BOOT, MAGTAGBOOT, HOUSEBOOT, etc.), in which case the UF2 bootloader may need to be repaired.

If a UF2 bootloader has never been installed on the board, or the UF2 bootloader was removed by erasing or overwriting the flash, the UF2 bootloader should be installed in order to flash .uf2 files onto the board.

Important: this will erase previously flashed firmware & sketches from the board, but needs to be perfomed only once.

  • Unzip to find the file combined.bin.
  • Place board in bootloader mode:
    • Plug board into a USB port on your computer using a data/sync cable. Make sure it is the only board plugged in, and that a charge-only cable is not being used.
    • Press and hold down the BOOT or 0 button.
    • Press and release the RESET or RST button.
    • Release the BOOT button.
  • Upload combined.bin (Google Chrome 89 or newer):
    • Open Adafruit WebSerial ESPTool in a new window/tab.
    • Select 460800 Baud from the pull-down menu (top-right).
    • Click Connect (top-right).
    • Select the COM or Serial port from the pop-up window.
    • After successful connection, click Erase.
    • After successful erase, click any Choose a file..., then locate and select the combined.bin file unzipped earlier.
    • After successfully choosing combined.bin, click Program.
    • After the TinyUF2 firmware update is complete, press the RESET button on the board. A new drive BOARDBOOT (where BOARD is an abbreviation of your board's name) should be visible in your file browser.

After you update, check INFO_UF2.TXT to verify that the bootloader version has been updated. Then you will need to load or reload CircuitPython using the .uf2 file.

Update UF2 Bootloader

Latest version: 0.5.2

The bootloader allows you to load CircuitPython, Makecode, and Arduino programs. The bootloader is not CircuitPython. You can check the current version of your bootloader by looking in the INFO_UF2.TXT file when the BOOT drive is visible (FEATHERBOOT, CPLAYBOOT, etc.).

update.uf2 files are not currently working on ESP32-S2 boards.

  • Save the contents of CIRCUITPY, just in case.
  • Follow instructions in the Install/Repair UF2 Bootloader section above.
  • Check INFO_UF2.TXT to verify that the bootloader version has been updated.
  • Reload CircuitPython.