ESP32-S2-WROOM vs ESP8684-WROOM-01C
ESP32-S2-WROOM
WROOM · ESP32-S2 · Active
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ESP8684-WROOM-01C
WROOM · ESP32-C2 · 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-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 14)
Choose ESP8684-WROOM-01C if you need
- Bluetooth LE
- smaller footprint (16×24 mm)
Size, to scale
- ESP32-S2-WROOM: 18×31 mm
- ESP8684-WROOM-01C: 16×24 mm
Spec differences at a glance
- CPU: ESP32-S2-WROOM Xtensa LX7, 1-core · ESP8684-WROOM-01C RISC-V, 1-core
- Max clock: ESP32-S2-WROOM 240 MHz · ESP8684-WROOM-01C 120 MHz
- SRAM: ESP32-S2-WROOM 320 KB · ESP8684-WROOM-01C 272 KB
- ROM: ESP32-S2-WROOM 128 KB · ESP8684-WROOM-01C 576 KB
- Flash options: ESP32-S2-WROOM 4 MB · ESP8684-WROOM-01C 2 / 4 MB
- Co-processor: ESP32-S2-WROOM ULP-RISC-V · ESP8684-WROOM-01C none
- Bluetooth: ESP32-S2-WROOM — · ESP8684-WROOM-01C BLE 5.x
- Usable GPIO: ESP32-S2-WROOM 37 · ESP8684-WROOM-01C 14
- ADC: ESP32-S2-WROOM 20× 12-bit · ESP8684-WROOM-01C 5× 12-bit
- USB: ESP32-S2-WROOM USB-OTG · ESP8684-WROOM-01C USB-Serial(external)
- UART / SPI / I²C / I²S: ESP32-S2-WROOM 2 / 2 / 2 / 1 · ESP8684-WROOM-01C 2 / 1 / 1 / 0
- TWAI (CAN): ESP32-S2-WROOM Yes · ESP8684-WROOM-01C No
- Touch: ESP32-S2-WROOM 14 · ESP8684-WROOM-01C 0
- Deep sleep: ESP32-S2-WROOM — µA · ESP8684-WROOM-01C 5 µA
- Dimensions: ESP32-S2-WROOM 18 × 31 × 3.3 mm · ESP8684-WROOM-01C 16 × 24 × 3.1 mm
- Pin count: ESP32-S2-WROOM 42 · ESP8684-WROOM-01C 23
- Temp range: ESP32-S2-WROOM -40 to 85 °C · ESP8684-WROOM-01C -40 to 105 °C
- Crypto: ESP32-S2-WROOM AES, SHA, RSA, HMAC, RNG · ESP8684-WROOM-01C ECC, SHA, RNG
- Digital signature: ESP32-S2-WROOM Yes · ESP8684-WROOM-01C No
Compute & memory
⚑ flag an error| ESP32-S2-WROOM | ESP8684-WROOM-01C | |
|---|---|---|
| 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-01C | |
|---|---|---|
| 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-01C | |
|---|---|---|
| Usable GPIO≠ | 37 | 14 |
| 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-01C | |
|---|---|---|
| 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-01C | |
|---|---|---|
| Dimensions≠ | 18 × 31 × 3.3 mm | 16 × 24 × 3.1 mm |
| Pin count≠ | 42 | 23 |
| 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-01C | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, HMAC, RNG | ECC, SHA, RNG |
| Digital signature≠ | Yes | No |
| TRNG | Yes | Yes |