ESP32-S3-WROOM-1
Generic Wi-Fi + BLE MCU module on a PCB antenna, based on ESP32-S3.
Espressif’s generic Wi-Fi + BLE module built on the ESP32-S3, with an on-board PCB antenna and the storage variants listed below. In MCUID’s hardware chain — chip → module → board — this page holds the module facts: variants, module-level pin conditions and board compatibility. Chip capabilities live on the ESP32-S3 chip page; headers, revisions and connectors on the board page.
Start from the board: ESP32-S3-DevKitC-1 — see the first-flash guide for the bring-up path.
What the module decides
- The variant suffix encodes memory (N = flash, R = PSRAM). Whether GPIO 35–37 are occupied by internal flash/PSRAM communication depends on the variant — the decision table lives in the GPIO 35/36/37 guide. The module record below states the official condition verbatim.
- Storage variants — the table below lists the official variants with their official source; flash/PSRAM capacity is this module’s fact, not the chip’s.
- Compatible boards — the list below is generated from the same data as the board pages.
Variants
| Variant | Summary | Source |
|---|---|---|
| N8 | 8 MB SPI flash, no PSRAM | DevKitC-1 guide v1.1 |
| N8R2 | 8 MB SPI flash, 2 MB PSRAM | DevKitC-1 guide v1.1 |
| N8R8 | 8 MB quad SPI flash, 8 MB octal SPI PSRAM (interface types per the v1.0 guide ordering table) | DevKitC-1 guide v1.0 |
| N16R8 | 16 MB SPI flash, 8 MB PSRAM | DevKitC-1 guide v1.1 |
Published fields
| Field | Value | Applies to | Status | Source | Notes |
|---|---|---|---|---|---|
gpio.occupied_by_internal_storage | 35, 36, 37 | Condition: variants with Octal SPI flash or PSRAM (not all WROOM-1 variants) | verified · cc40 · 2026-11-08 | DevKitC-1 guide v1.1 | Official guide note: for boards with Octal SPI flash/PSRAM embedded ESP32-S3-WROOM-1/1U modules, GPIO35-37 are used for internal communication between ESP32-S3 and SPI flash/PSRAM and are not available for external use. The restriction is NOT valid for all WROOM-1 configurations; variant-level storage interface types are not listed for every ordering code in the guide. |