ESP32-S3-EYE

The ESP32-S3-EYE is a small-sized AI development board from Espressif featuring the ESP32-S3 CPU with a 2-Megapixel camera, an LCD display, a microphone, an 8 MB Octal PSRAM and an 8 MB flash.

Features

ESP32-S3 WROOM-1 Module

USB micro USB port (it uses internal USB JTAG SERIAL device for flashing)

Power LED

LCD Display

2-MP Camera

MEMS Microphone

8MB Octal PSRAM

8MB SPI Flash

RST and BOOT buttons (BOOT accessible to user)

Configurations

All of the configurations presented below can be tested by running the following commands:

$ ./tools/configure.sh esp32s3-eye:<config_name>
$ make flash ESPTOOL_PORT=/dev/ttyUSB0 -j

Where <config_name> is the name of board configuration you want to use, i.e.: nsh, buttons, wifi… Then use a serial console terminal like picocom configured to 115200 8N1.

nsh

Basic NuttShell configuration (console enabled in USB JTAG SERIAL Device, exposed via USB connection at 9600 bps).

usbnsh

Basic NuttShell configuration console enabled over USB Device (USB CDC/ACM).

Before using this configuration, please confirm that your computer detected that USB JTAG/serial interface used to flash the board:

usb 3-5.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 3-5.2.3: Product: USB JTAG/serial debug unit
usb 3-5.2.3: Manufacturer: Espressif
usb 3-5.2.3: SerialNumber: XX:XX:XX:XX:XX:XX
cdc_acm 3-5.2.3:1.0: ttyACM0: USB ACM device

Then you can run the configuration and compilation procedure:

$ ./tools/configure.sh esp32s3-eye:usbnsh
$ make flash ESPTOOL_PORT=/dev/ttyACM0 -j8

Then run the minicom configured to /dev/ttyACM0 115200 8n1 and press <ENTER> three times to force the nsh to show up:

NuttShell (NSH) NuttX-12.1.0
nsh> ?
help usage:  help [-v] [<cmd>]

    .         break     dd        exit      ls        ps        source    umount
    [         cat       df        false     mkdir     pwd       test      unset
    ?         cd        dmesg     free      mkrd      rm        time      uptime
    alias     cp        echo      help      mount     rmdir     true      usleep
    unalias   cmp       env       hexdump   mv        set       truncate  xd
    basename  dirname   exec      kill      printf    sleep     uname

Builtin Apps:
    nsh  sh
nsh> uname -a
NuttX 12.1.0 38a73cd970 Jun 18 2023 16:58:46 xtensa esp32s3-eye
nsh>

Flashing

Because ESP32-S3 doesn’t use an external USB/Serial chip like others ESP32 boards you should put it in programming mode this way:

Press and hold BOOT and RESET (RST) buttons at same time;

Release the RESET button and keep BOOT button pressed;

After one or more seconds release the BOOT button;

Run the flashing command: make flash ESPTOOL_PORT=/dev/ttyACM0

Serial Console

The internal USB JTAG SERIAL Device, by default, is used as serial console. It is normally detected by Linux host as a USB CDC/ACM serial device.

It will show up as /dev/ttyACM[n] where [n] will probably be 0.

You can use minicom with /dev/ttyACM0 port at 9600 8n1 or picocom this way:

$ picocom -b9600 /dev/ttyACM0

Buttons and LEDs

Board Buttons

There are two buttons labeled BOOT and RST. The RST button is not available to software. It pulls the chip enable line that doubles as a reset line.

The BOOT button is connected to IO0. On reset it is used as a strapping pin to determine whether the chip boots normally or into the serial bootloader. After reset, however, the BOOT button can be used for software input.

Board LEDs

There are several on-board LEDs for that indicate the presence of power and USB activity. None of these are available for use by software.

Pin Mapping

Todo

To be updated

Pin	Signal	Notes
?	?	?