ESP32-S2-WROOM vs ESP8684-WROOM-03
ESP32-S2-WROOM
WROOM · ESP32-S2 · Active
Check price on AliExpress →
As an affiliate we may earn from qualifying purchases. Prices and availability are set by AliExpress.
ESP8684-WROOM-03
WROOM · ESP32-C2 · Active
Check price on AliExpress →
As an affiliate we may earn from qualifying purchases. Prices and availability are set by AliExpress.
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?
These run different SoCs (ESP32-S2 vs ESP32-C2), so they differ in CPU, wireless and peripherals — not just packaging.
Choose ESP32-S2-WROOM if you need
- faster CPU (240 MHz, Xtensa LX7)
- native USB-OTG — act as a USB device/host without a USB-UART chip
- more usable GPIO (37 vs 8)
Choose ESP8684-WROOM-03 if you need
- Bluetooth LE
- smaller footprint (15×17.3 mm)
Size, to scale
- ESP32-S2-WROOM — 18×31 mm
- ESP8684-WROOM-03 — 15×17.3 mm
Spec differences at a glance
- CPU: ESP32-S2-WROOM Xtensa LX7, 1-core · ESP8684-WROOM-03 RISC-V, 1-core
- Max clock: ESP32-S2-WROOM 240 MHz · ESP8684-WROOM-03 120 MHz
- SRAM: ESP32-S2-WROOM 320 KB · ESP8684-WROOM-03 272 KB
- ROM: ESP32-S2-WROOM 128 KB · ESP8684-WROOM-03 576 KB
- Flash options: ESP32-S2-WROOM 4 MB · ESP8684-WROOM-03 2 / 4 MB
- Co-processor: ESP32-S2-WROOM ULP-RISC-V · ESP8684-WROOM-03 none
- Bluetooth: ESP32-S2-WROOM — · ESP8684-WROOM-03 BLE 5.x
- Usable GPIO: ESP32-S2-WROOM 37 · ESP8684-WROOM-03 8
- ADC: ESP32-S2-WROOM 20× 12-bit · ESP8684-WROOM-03 5× 12-bit
- USB: ESP32-S2-WROOM USB-OTG · ESP8684-WROOM-03 USB-Serial(external)
- UART / SPI / I²C / I²S: ESP32-S2-WROOM 2 / 2 / 2 / 1 · ESP8684-WROOM-03 2 / 1 / 1 / 0
- TWAI (CAN): ESP32-S2-WROOM Yes · ESP8684-WROOM-03 No
- Touch: ESP32-S2-WROOM 14 · ESP8684-WROOM-03 0
- Deep sleep: ESP32-S2-WROOM — µA · ESP8684-WROOM-03 5 µA
- Dimensions: ESP32-S2-WROOM 18 × 31 × 3.3 mm · ESP8684-WROOM-03 15 × 17.3 × 2.8 mm
- Pin count: ESP32-S2-WROOM 42 · ESP8684-WROOM-03 11
- Temp range: ESP32-S2-WROOM -40 to 85 °C · ESP8684-WROOM-03 -40 to 105 °C
- Crypto: ESP32-S2-WROOM AES, SHA, RSA, HMAC, RNG · ESP8684-WROOM-03 ECC, SHA, RNG
- Digital signature: ESP32-S2-WROOM Yes · ESP8684-WROOM-03 No
Compute & memory
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-03 | |
|---|---|---|
| CPU≠ | Xtensa LX7, 1-core | RISC-V, 1-core |
| Max clock≠ | 240 MHz | 120 MHz |
| SRAM≠ | 320 KB | 272 KB |
| ROM≠ | 128 KB | 576 KB |
| Flash options≠ | 4 MB | 2 / 4 MB |
| PSRAM | None | None |
| Co-processor≠ | ULP-RISC-V | none |
Wireless
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-03 | |
|---|---|---|
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Wi-Fi bands | 2.4GHz | 2.4GHz |
| Bluetooth≠ | — | BLE 5.x |
| 802.15.4 (Thread/Zigbee) | No | No |
| Antenna | PCB | PCB |
Peripherals & I/O
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-03 | |
|---|---|---|
| Usable GPIO≠ | 37 | 8 |
| ADC≠ | 20× 12-bit | 5× 12-bit |
| USB≠ | USB-OTG | USB-Serial(external) |
| UART / SPI / I²C / I²S≠ | 2 / 2 / 2 / 1 | 2 / 1 / 1 / 0 |
| TWAI (CAN)≠ | Yes | No |
| SD/MMC | No | No |
| Ethernet MAC | No | No |
| Touch≠ | 14 | 0 |
Power
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-03 | |
|---|---|---|
| Operating voltage | 3.0-3.6 V | 3.0-3.6 V |
| Deep sleep≠ | — µA | 5 µA |
Physical
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-03 | |
|---|---|---|
| Dimensions≠ | 18 × 31 × 3.3 mm | 15 × 17.3 × 2.8 mm |
| Pin count≠ | 42 | 11 |
| Temp range≠ | -40 to 85 °C | -40 to 105 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-03 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, HMAC, RNG | ECC, SHA, RNG |
| Digital signature≠ | Yes | No |
| TRNG | Yes | Yes |