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Arduino Nano ESP32

This board is an official Arduino board with the ESP32-S3 chip

This board can be bought from the Arduino Store. https://store.arduino.cc/products/nano-esp32.

Arduino Nano ESP32

The Arduino Nano ESP32 is a development board using the ESP32-S3 based module NORA-W106-10B from u-blox providing the Arduino Nano form factor.

It is a good board for development and fits good on top of a breadboard or the Nano Adapters.

This board is equipped with:

The board comes with its special bootloader that uses Arduino Upload procedure instead of the Standard espressif procedure. (see below)

The Arduino Nano ESP32 Cheat Sheet gives new details.

Arduino Bootloader

The board comes with a bootloader especially made for the Arduino environment that starts first before the sketch starts.

When pressing the Reseet Button the bootloader will create a rainbow light effect on the on-board RGB Led that takes about a second and then automatically starts the sketch.

While the rainbow light effect is running you can again press (effective a double-click) the Reset button to keep the bootloader in programming mode and wait for the new binary to be uploaded. This is illumnated by slowly pulsing green.

You can also upload sketches using the standard esptool to gain some additional space but the Arduino then will loose the bootloader.

To start the Native Boot mode (firmware download mode) you have to connect B1 to GND and press the Reset button.

It can be re-applied using following the steps of this Help Center article: Reset the Arduino bootloader on the Nano ESP32

Buttons

The Reset Button (RST) is the only button on the board that can be used to re-start the uploaded sketch and also can be used to start in programming mode.

On-Board LEDs

There is a green LED next to the USB connector that is permanently on while VCC is available.

The yellow LED on the opposite site can be switched on by providing HIGH on GPIO48. The LED_BUILTIN definition is available.

On-Board RGB LED

The RGB led on the board next to the Reset button can be switched on by pulling the GPIO lines to LOW:

Color pin Define
Red GPIO46 LED_RED
Green GPIO0 LED_GREEN
Blue GPIO45 LED_BLUE

ESP32 Pin Map

The board has the Arduino typical pin descriptions D0 - D13 and A0 - A7. Also B0 and B1 is available.

Pin GPIO available C Defines Usage
RX0 / D0 44 D0, RX
TX1 / D1 43 D1, TX
D2 5 D2,
D3 6 D3, CTS
D4 7 D4, DSR
D5 8 D5,
D6 9 D6,
D7 10 D7, PIN_I2S_SCK
D8 17 D8, PIN_I2S_FS
D9 18 D9, PIN_I2S_SD, PIN_I2S_SD_OUT
D10 21 D10, PIN_I2S_SD_IN, SS
D11 38 D11, MOSI SPI-COPI
D12 47 D12, MISO SPI-CIPO
D13 48 D13, SCK, LED_BUILTIN SPI-SCK
A0 1 A0, DTR DTR
A1 2 A1,
A2 3 A2,
A3 4 A3,
A4 11 A4, SDA I2C-SDA
A5 12 A5, SCL I2C-SCL
A6 13 A6,
A7 14 A7,
B0 46
B1 0 LED_GREEN RGB green color, ROM boot
46 LED_RED RGB red color
45 LED_BLUE, RTS RGB blue color

There is a board option to use the printed Arduino numbering or the native GPIO numbering.

Arduino Board Configuration

To compile for this board in Arduino using the esp32 implementation from espressif the following settings for the board can be used:

Board configuration

The following env.json configuration can be used for this board and contains settings for

{
  "device": {
    "0": {
      "name": "nano",
      "title": "Arduino Nano ESP32",
      "description": "Arduino Nano ESP32 Original board.",
      "loglevel": 2,
      "led": "13"
    }
  },

  "light": {
    "led": {
      "title": "rgb led",
      "loglevel": 0,
      "pin": "14,15,16",
      "value": "x203050"
    }
  }

}

See Also

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