ESP32-S3-WROOM-1 vs ESP32-S3-WROOM-2
ESP32-S3-WROOM-1
WROOM · ESP32-S3 · Active
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ESP32-S3-WROOM-2
WROOM · ESP32-S3 · Active
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Every figure here is checked against Espressif’s official datasheets. We’ve taken every care to keep it accurate — but datasheets are dense and mistakes happen, so if something looks off, please report it.
Which should you choose?
Both are built on the same ESP32-S3 SoC, so CPU and radios are identical — the choice is about memory, form factor and antenna.
These two are closely matched on the spec sheet — decide on price, availability and which footprint fits your board.
Size, to scale
Same footprint — both are 18×25.5 mm.
Spec differences at a glance
- Flash options: ESP32-S3-WROOM-1 4 / 8 / 16 MB · ESP32-S3-WROOM-2 16 / 32 MB
- PSRAM: ESP32-S3-WROOM-1 2 / 8 / 16 MB · ESP32-S3-WROOM-2 8 / 16 MB (octal)
- Usable GPIO: ESP32-S3-WROOM-1 36 · ESP32-S3-WROOM-2 33
- Temp range: ESP32-S3-WROOM-1 -40 to 85 °C · ESP32-S3-WROOM-2 -40 to 65 °C
Compute & memory
⚑ flag an error| ESP32-S3-WROOM-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| CPU | Xtensa LX7, 2-core | Xtensa LX7, 2-core |
| Max clock | 240 MHz | 240 MHz |
| SRAM | 512 KB | 512 KB |
| ROM | 384 KB | 384 KB |
| Flash options≠ | 4 / 8 / 16 MB | 16 / 32 MB |
| PSRAM≠ | 2 / 8 / 16 MB | 8 / 16 MB (octal) |
| Co-processor | ULP-RISC-V | ULP-RISC-V |
Wireless
⚑ flag an error| ESP32-S3-WROOM-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Wi-Fi bands | 2.4GHz | 2.4GHz |
| Bluetooth | BLE 5.x | BLE 5.x |
| 802.15.4 (Thread/Zigbee) | No | No |
| Antenna | PCB | PCB |
Peripherals & I/O
⚑ flag an error| ESP32-S3-WROOM-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Usable GPIO≠ | 36 | 33 |
| ADC | 20× 12-bit | 20× 12-bit |
| USB | USB-OTG | USB-OTG |
| UART / SPI / I²C / I²S | 3 / 2 / 2 / 2 | 3 / 2 / 2 / 2 |
| TWAI (CAN) | Yes | Yes |
| SD/MMC | Yes | Yes |
| Ethernet MAC | No | No |
| Touch | 14 | 14 |
Power
⚑ flag an error| ESP32-S3-WROOM-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Operating voltage | 3.0-3.6 V | 3.0-3.6 V |
| Deep sleep | 7 µA | 7 µA |
Physical
⚑ flag an error| ESP32-S3-WROOM-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Dimensions | 18 × 25.5 × 3.1 mm | 18 × 25.5 × 3.1 mm |
| Pin count | 41 | 41 |
| Temp range≠ | -40 to 85 °C | -40 to 65 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP32-S3-WROOM-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto | AES, SHA, RSA, HMAC, RNG | AES, SHA, RSA, HMAC, RNG |
| Digital signature | Yes | Yes |
| TRNG | Yes | Yes |