ESP32-MINI-1 vs ESP32-S3-WROOM-2
ESP32-MINI-1
MINI · ESP32 · Active
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ESP32-S3-WROOM-2
WROOM · ESP32-S3 · Active
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Figures here are compiled from Espressif's official datasheets, with the source linked on each page. Mistakes are possible, so if something looks off, please report it.
Which should you choose?
These run different SoCs (ESP32 vs ESP32-S3), so they differ in CPU, wireless and peripherals, not just packaging.
Choose ESP32-MINI-1 if you need
- Bluetooth Classic (BR/EDR) for legacy SPP / A2DP audio
- Ethernet MAC for wired networking (add an external PHY)
- smaller footprint (13.2×19 mm)
Choose ESP32-S3-WROOM-2 if you need
- vector / AI acceleration for on-device ML and DSP
- PSRAM for camera frames, audio buffers and LVGL/large displays
- larger flash option (up to 32 MB) for bigger firmware and OTA
- native USB-OTG: act as a USB device/host without a USB-UART chip
- more usable GPIO (33 vs 28)
Size, to scale
- ESP32-MINI-1: 13.2×19 mm
- ESP32-S3-WROOM-2: 18×25.5 mm
Spec differences at a glance
- CPU: ESP32-MINI-1 Xtensa LX6, 2-core · ESP32-S3-WROOM-2 Xtensa LX7, 2-core
- SRAM: ESP32-MINI-1 520 KB · ESP32-S3-WROOM-2 512 KB
- ROM: ESP32-MINI-1 448 KB · ESP32-S3-WROOM-2 384 KB
- Flash options: ESP32-MINI-1 4 MB · ESP32-S3-WROOM-2 16 / 32 MB
- PSRAM: ESP32-MINI-1 None · ESP32-S3-WROOM-2 8 / 16 MB (octal)
- Co-processor: ESP32-MINI-1 ULP-FSM · ESP32-S3-WROOM-2 ULP-RISC-V
- Bluetooth: ESP32-MINI-1 BT Classic + BLE · ESP32-S3-WROOM-2 BLE 5.x
- Usable GPIO: ESP32-MINI-1 28 · ESP32-S3-WROOM-2 33
- ADC: ESP32-MINI-1 18× 12-bit · ESP32-S3-WROOM-2 20× 12-bit
- USB: ESP32-MINI-1 USB-Serial(external) · ESP32-S3-WROOM-2 USB-OTG
- Ethernet MAC: ESP32-MINI-1 Yes · ESP32-S3-WROOM-2 No
- Touch: ESP32-MINI-1 10 · ESP32-S3-WROOM-2 14
- Deep sleep: ESP32-MINI-1 10 µA · ESP32-S3-WROOM-2 7 µA
- Dimensions: ESP32-MINI-1 13.2 × 19 × 2.4 mm · ESP32-S3-WROOM-2 18 × 25.5 × 3.1 mm
- Pin count: ESP32-MINI-1 34 · ESP32-S3-WROOM-2 41
- Temp range: ESP32-MINI-1 -40 to 85 °C · ESP32-S3-WROOM-2 -40 to 65 °C
- Crypto: ESP32-MINI-1 AES, SHA, RSA, RNG · ESP32-S3-WROOM-2 AES, SHA, RSA, HMAC, RNG
- Digital signature: ESP32-MINI-1 No · ESP32-S3-WROOM-2 Yes
Compute & memory
⚑ flag an error| ESP32-MINI-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| CPU≠ | Xtensa LX6, 2-core | Xtensa LX7, 2-core |
| Max clock | 240 MHz | 240 MHz |
| SRAM≠ | 520 KB | 512 KB |
| ROM≠ | 448 KB | 384 KB |
| Flash options≠ | 4 MB | 16 / 32 MB |
| PSRAM≠ | None | 8 / 16 MB (octal) |
| Co-processor≠ | ULP-FSM | ULP-RISC-V |
Wireless
⚑ flag an error| ESP32-MINI-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Wi-Fi bands | 2.4GHz | 2.4GHz |
| Bluetooth≠ | BT Classic + BLE | BLE 5.x |
| 802.15.4 (Thread/Zigbee) | No | No |
| Antenna | PCB | PCB |
Peripherals & I/O
⚑ flag an error| ESP32-MINI-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Usable GPIO≠ | 28 | 33 |
| ADC≠ | 18× 12-bit | 20× 12-bit |
| USB≠ | USB-Serial(external) | USB-OTG |
| UART / SPI / I²C / I²S | 3 / 2 / 2 / 2 | 3 / 2 / 2 / 2 |
| TWAI (CAN) | Yes | Yes |
| SD/MMC | Yes | Yes |
| Ethernet MAC≠ | Yes | No |
| Touch≠ | 10 | 14 |
Power
⚑ flag an error| ESP32-MINI-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Operating voltage | 3.0-3.6 V | 3.0-3.6 V |
| Deep sleep≠ | 10 µA | 7 µA |
Physical
⚑ flag an error| ESP32-MINI-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Dimensions≠ | 13.2 × 19 × 2.4 mm | 18 × 25.5 × 3.1 mm |
| Pin count≠ | 34 | 41 |
| Temp range≠ | -40 to 85 °C | -40 to 65 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP32-MINI-1 | ESP32-S3-WROOM-2 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, RNG | AES, SHA, RSA, HMAC, RNG |
| Digital signature≠ | No | Yes |
| TRNG | Yes | Yes |