ESP32-S3 N16R8 Dual Type-C Development Board - 16MB Flash, 8MB PSRAM

Specifications

• Microcontroller: Espressif ESP32-S3 (Dual-core 32-bit Xtensa LX7)

• Clock Speed: Up to 240 MHz

• Flash Memory: 16 MB (Quad SPI)

• PSRAM: 8 MB (Octal SPI)

• Wireless: 2.4 GHz Wi-Fi (802.11 b/g/n) & Bluetooth 5 (LE / Mesh)

• USB Interfaces: 2x USB Type-C (1x UART, 1x Native USB/OTG)

• GPIO Pins: Up to 34 available (Supports PWM, ADC, I2C, SPI, UART, I2S)

• Operating Voltage: 3.3V logic (Powered via 5V from USB or VIN)

• Onboard Features: RGB LED (WS2812B/Neopixel compatible), Reset & Boot Buttons, PCB Antenna.

Downloads: 

• ESP32-S3-WROOM-1-N16R8_Datasheet

Unlock New Capabilities (Project Evolution)

The Ultimate Smart Home Dashboard: Because of the massive 16MB Flash and 8MB Octal PSRAM, this board is the absolute perfect candidate for driving graphical user interfaces. Pair this board with a large capacitive touch TFT display. You can use LVGL (Light and Versatile Graphics Library) to build a stunning, fluid, 60fps graphical dashboard. The 8MB of PSRAM easily handles the large frame buffers required for smooth animations and high-resolution background images, while the 16MB Flash holds all your custom fonts and UI assets. Connect it to Home Assistant via Wi-Fi to control your entire house from a sleek, custom-built touchscreen!

PACKAGE INCLUDED

• 1 x ESP32-S3-WROOM-1 (N16R8) Dual Type-C Development Board

• Note: The board comes with male header pins non soldered for immediate breadboard compatibility.

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What does the "N16R8" stand for?

It dictates the memory configuration of the module. "N16" stands for 16 Megabytes of Flash memory, and "R8" stands for 8 Megabytes of PSRAM.

2. What is the difference between the ESP32 and the ESP32-S3?

The ESP32-S3 is a newer generation. While both are dual-core, the S3 uses a faster LX7 architecture, adds vector instructions for AI/Machine Learning acceleration, upgrades to Bluetooth 5 (LE only, dropping older Bluetooth Classic), and includes a native USB OTG interface.

3. Why are there two USB Type-C ports?

One port (usually labeled COM or UART) is routed through a USB-to-serial chip for standard serial console monitoring and flashing. The other port (labeled USB) connects directly to the ESP32-S3's native USB pins, allowing it to emulate USB devices (keyboards, mice, MIDI) or be debugged via native JTAG.

4. Do I need to hold the "BOOT" button to upload code?

Usually, no. The board features an auto-reset circuit (using DTR/RTS lines via the UART port) that automatically puts the chip into flashing mode. However, if your native USB port crashes or you put the board in deep sleep, you may occasionally need to hold BOOT, tap RESET, and then release BOOT to force it into download mode.

5. Which USB port should I use to program the board in the Arduino IDE?

You can actually use either! However, for beginners, using the "COM / UART" port is recommended because the serial monitor will stay connected consistently, even if your code crashes the main processor.

6. Does this board support 5GHz Wi-Fi?

No. Like almost all microcontrollers in this class, the ESP32-S3 only supports 2.4 GHz Wi-Fi (802.11 b/g/n) to maintain low power consumption and longer range.

7. Can I program this board using MicroPython or CircuitPython?

Absolutely. The massive 16MB of Flash and 8MB of PSRAM make this specific board arguably the best ESP32 variant for MicroPython and CircuitPython, as it provides immense space for your scripts and dynamic memory allocation.

8. Is the PSRAM on this board Quad SPI or Octal SPI?

The 8MB PSRAM on the N16R8 module utilizes the high-speed Octal SPI (OPI) interface, which is significantly faster than the older Quad SPI PSRAM found on standard ESP32 boards.

9. What voltage do the GPIO pins operate at?

The GPIO pins operate strictly at 3.3V. Applying 5V directly to any GPIO pin will permanently damage the ESP32-S3 chip.

10. Can I power this board with a 3.7V LiPo battery?

You can connect a 3.7V battery to the 5V pin (it will drop through the regulator), but it is not highly efficient, and there is no built-in battery charging circuit on this specific barebones dev board. You would need an external charging module (like a TP4056) and a 3.3V LDO for safe, long-term battery operation.

11. What is the onboard RGB LED connected to?

Most of these boards feature an onboard WS2812B (Neopixel-compatible) addressable RGB LED. It is typically wired to GPIO 48, though you should verify the exact pin in your specific board's documentation.

12. Does this board support Bluetooth Classic?

No. The ESP32-S3 dropped support for legacy Bluetooth Classic (BR/EDR). It supports Bluetooth 5 (Low Energy) and Bluetooth Mesh exclusively. If you absolutely need Bluetooth Classic for legacy audio streaming, you need the original ESP32.

13. What happens if I plug cables into both USB ports at the same time?

The board is designed with diode protection on the 5V lines from the USB ports. It is generally safe to have both plugged in simultaneously (e.g., using one for power/serial monitoring and the other to test USB host functionality).

14. Are all the pins on the board usable?

Mostly, yes. However, some pins are used internally to communicate with the integrated Flash and PSRAM (typically GPIO 26-32, though it varies by module). Do not use the pins labeled specifically for internal flash.

15. Does this board support JTAG debugging?

Yes! Because of the native USB interface on the S3, you can perform full JTAG debugging (breakpoints, step-through code, memory inspection) directly over the "USB" Type-C port without needing an expensive external JTAG debugger hardware.

16. I am getting an "Out of Memory" error even though I have 8MB of PSRAM. Why?

By default, the Arduino IDE does not automatically utilize the PSRAM. You must go to Tools > PSRAM and select OPI PSRAM (or enabled) to tell the compiler to utilize the extra memory.

17. Can I attach an external Wi-Fi antenna to this board?

No. The ESP32-S3-WROOM-1 module has a PCB trace antenna printed directly onto the module. If you require an external antenna, you need to purchase a board utilizing the ESP32-S3-WROOM-1U module, which features a U.FL connector.

18. What is the maximum current output of the 3.3V pin?

The onboard 3.3V voltage regulator (usually an AMS1117-3.3 or similar) can typically provide up to 700mA to 800mA. However, the ESP32-S3 itself can draw significant current (up to 350mA during Wi-Fi transmission), so you should not draw more than ~300mA for external components.

19. Is this board breadboard compatible?

Yes, the board features two rows of standard 2.54mm (0.1") pitch header pins that will slot directly into a standard breadboard, though it is quite wide and may only leave one row of tie-points exposed on one side.

20. Does the ESP32-S3 have a built-in DAC for audio?

No, a major architectural change in the ESP32-S3 is the removal of the internal hardware DACs (Digital-to-Analog Converters) found in the original ESP32. To output high-quality audio, you must use the I2S interface connected to an external DAC chip (like a MAX98357A).