# ESP32-S3-WROOM-1-N16R8: a module-selection and Arduino setup checklist

**URL:** <https://forum.arduino.cc/t/esp32-s3-wroom-1-n16r8-a-module-selection-and-arduino-setup-checklist/1464162>\
**Category:** Products and Services\
**Created:** [October 18, 2026, 8:28am UTC](https://forum.arduino.cc/t/esp32-s3-wroom-1-n16r8-a-module-selection-and-arduino-setup-checklist/1464162 "2026-10-18T08:28:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![hongte\_components](https://dub1.discourse-cdn.com/arduino/user_avatar/forum.arduino.cc/hongte_components/32/1287372_2.png) [@hongte\_components](https://forum.arduino.cc/u/hongte_components)\
**Post date:** [October 18, 2026, 8:28am UTC](https://forum.arduino.cc/t/esp32-s3-wroom-1-n16r8-a-module-selection-and-arduino-setup-checklist/1464162/1 "2026-10-18T08:28:34Z")

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Hi everyone, I represent HONGTE, an electronic-component supplier in Shenzhen. We list the ESP32-S3-WROOM-1-N16R8, and I wanted to share a few checks for anyone choosing it for a custom board or Arduino-based project.

The important detail is the memory combination: **16 MB of Quad-SPI Flash and 8 MB of Octal-SPI PSRAM**. These serve different purposes; they do not add up to "24 MB RAM." Flash holds firmware and data, while PSRAM is volatile working memory.

Before ordering or configuring a project:

- **Check the complete N16R8 marking.** Other ESP32-S3-WROOM variants have different memory configurations.
- **Match the Arduino-ESP32 settings.** Select the correct board definition. Where the options are exposed, match the 16 MB Flash size and OPI PSRAM setting to this module. Octal PSRAM does not mean Octal Flash.
- **Check the partition scheme** against your application, filesystem and OTA requirements. Physical Flash capacity is not the same as the space allocated to one sketch.
- **Allow space for the antenna.** WROOM-1 uses a PCB antenna. Plan its antenna clearance using the module datasheet.
- **Plan the carrier board.** This is a surface-mount module, rather than a USB development board. A carrier must provide the required 3.0–3.6 V supply, programming connections and boot/reset circuitry.

Espressif's Arduino-ESP32 configuration reference:

> **[Troubleshooting - - — Arduino ESP32 latest documentation](https://docs.espressif.com/projects/arduino-esp32/en/latest/troubleshooting.html)**

For readers sourcing this exact part, our product listing is here:

> **[ESP32-S3-WROOM-1-N16R8 Wi-Fi BLE Module | HONGTE](https://hongte-ic.com/products/esp32-s3-wroom-1-n16r8)**
>
> Espressif ESP32-S3-WROOM-1-N16R8 module with 16 MB flash, 8 MB PSRAM and PCB antenna. US$4 each, 10,600 pcs listed. MOQ 1; request delivery details from HONGTE.