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Arduino Nano ESP32

The Arduino Nano ESP32 puts a full ESP32-S3 with dual-core Xtensa LX7, 16MB flash, 8MB PSRAM, WiFi, and BLE 5.0 into the classic Arduino Nano form factor with USB-C. Unlike the Uno R4 WiFi, the S3 is the main processor — you get direct access to all ESP32-S3 capabilities through the Arduino IDE.

★★★★☆ 4.3/5.0

Best for getting full ESP32-S3 power in an Arduino-native package, skip if you need more GPIO pins or lower cost.

Best for: Arduino users upgrading to ESP32-S3compact WiFi/BLE projects in Arduino IDEAI/ML prototyping with Arduino libraries
Not for: projects needing many GPIO pinscost-sensitive deployments

Where to Buy

Check Price on Amazon (paid link) Check Price on arduino (paid link)

Pros

  • Full ESP32-S3 as main processor — dual-core LX7 at 240MHz with AI vector instructions
  • 16MB flash and 8MB PSRAM — highest flash of any Nano-format board
  • Arduino IDE native support with ESP32 Arduino Core
  • USB-C with native USB-OTG for HID devices

Cons

  • Only 14 GPIO pins exposed — fewer than the XIAO ESP32S3's comparable spec
  • Higher price than third-party ESP32-S3 boards like the XIAO
  • Arduino Nano form factor is not breadboard-friendly on both sides simultaneously

Full ESP32-S3 Access

Unlike the Uno R4 WiFi where the ESP32-S3 is a locked-down coprocessor, the Nano ESP32 gives you the full ESP32-S3 as your main processor. Your Arduino sketch runs directly on the dual-core Xtensa LX7 at 240MHz. You get access to the AI vector instructions, 8MB PSRAM, USB-OTG, and all ESP32-S3 peripherals.

This makes the Nano ESP32 functionally equivalent to the ESP32-S3-DevKitC or XIAO ESP32S3 in terms of processing capability. The difference is the Arduino Nano pinout and the Arduino brand's IDE integration and documentation.

Nano Form Factor Trade-offs

The 45x18mm Nano form factor is compact but exposes only 14 GPIO pins — the ESP32-S3 chip has 45 GPIO, but most are consumed by the WiFi/BLE radio and internal peripherals. The XIAO ESP32S3 is even smaller at 21x17.5mm but exposes 11 GPIO. The full DevKitC exposes 45 GPIO at 69x25.4mm.

For projects with 1-2 SPI devices and an I2C bus, 14 GPIO is sufficient. For projects connecting many independent peripherals, you will need the DevKitC's full pin breakout.

Full Specifications

Processor

Specification Value
Architecture Xtensa LX7
CPU Cores 2
Clock Speed 240 MHz

Memory

Specification Value
Flash 16 MB
SRAM 512 KB
PSRAM 8 MB

Connectivity

Specification Value
WiFi 802.11 b/g/n
Bluetooth 5.0

I/O & Interfaces

Specification Value
GPIO Pins 14
ADC Channels 8
SPI 1
I2C 1
UART 1
USB USB-C (native)

Power

Specification Value
Input Voltage 5-18 V
operating_voltage 3.3 V

Physical

Specification Value
Dimensions 45 x 18 mm
Form Factor Arduino Nano

Who Should Buy This

Buy Arduino user wanting ESP32-S3 performance

The only official Arduino with the full ESP32-S3 as main processor. 240MHz dual-core, 8MB PSRAM, AI vectors — all programmable through Arduino IDE with full library support.

Buy Compact ML inference project

16MB flash stores models. 8MB PSRAM holds inference buffers. Arduino IDE simplifies deployment. 45x18mm fits in small enclosures.

Consider Budget compact ESP32-S3 project

The XIAO ESP32S3 has the same chip and PSRAM in a smaller package at a lower price, plus battery charging. Choose the Nano ESP32 for Arduino brand support and wider pin header.

Better alternative: Seeed Studio XIAO ESP32S3

Frequently Asked Questions

Arduino Nano ESP32 vs XIAO ESP32S3: which is better?

Same chip, same PSRAM. The XIAO is smaller (21mm vs 45mm) and cheaper with battery charging. The Nano ESP32 has 16MB flash (vs 8MB), wider pin headers, and official Arduino brand support. Choose based on size needs and ecosystem preference.

Can the Nano ESP32 run ESP-IDF code?

Yes. Since it uses the ESP32-S3 as its main processor, you can flash ESP-IDF firmware directly. You are not locked into the Arduino IDE — PlatformIO and ESP-IDF toolchains both work.

Does the Nano ESP32 have camera support?

The ESP32-S3 chip supports cameras, but the Nano ESP32 does not break out the DVP camera pins. For camera projects, use the ESP32-S3-DevKitC or XIAO ESP32S3 Sense.

Is the Nano ESP32 compatible with Nano shields?

Yes, if the shield works with 3.3V logic. The Nano ESP32 runs at 3.3V, while older Arduino Nanos run at 5V. Shields designed for 5V logic may not work correctly without level shifting.

Why choose the Nano ESP32 over the regular DevKitC?

The Arduino brand, Arduino IDE integration, and Nano form factor. If you are already in the Arduino ecosystem and want an easy upgrade to ESP32-S3 performance, the Nano ESP32 reduces friction. The DevKitC offers more GPIO and lower cost.

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