ESP32-WROOM-32E vs ESP8684-WROOM-01C
ESP32-WROOM-32E
WROOM · ESP32 · Active
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ESP8684-WROOM-01C
WROOM · ESP32-C2 · 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?
These run different SoCs (ESP32 vs ESP32-C2), so they differ in CPU, wireless and peripherals — not just packaging.
Choose ESP32-WROOM-32E if you need
- Bluetooth Classic (BR/EDR) for legacy SPP / A2DP audio
- 2 CPU cores vs 1 — more headroom for RTOS / parallel work
- faster CPU (240 MHz, Xtensa LX6)
- PSRAM for camera frames, audio buffers and LVGL/large displays
- larger flash option (up to 16 MB) for bigger firmware and OTA
Choose ESP8684-WROOM-01C if you need
- smaller footprint (16×24 mm)
Size, to scale
- ESP32-WROOM-32E — 18×25.5 mm
- ESP8684-WROOM-01C — 16×24 mm
Spec differences at a glance
- CPU: ESP32-WROOM-32E Xtensa LX6, 2-core · ESP8684-WROOM-01C RISC-V, 1-core
- Max clock: ESP32-WROOM-32E 240 MHz · ESP8684-WROOM-01C 120 MHz
- SRAM: ESP32-WROOM-32E 520 KB · ESP8684-WROOM-01C 272 KB
- ROM: ESP32-WROOM-32E 448 KB · ESP8684-WROOM-01C 576 KB
- Flash options: ESP32-WROOM-32E 4 / 8 / 16 MB · ESP8684-WROOM-01C 2 / 4 MB
- PSRAM: ESP32-WROOM-32E 2 MB (quad) · ESP8684-WROOM-01C None
- Co-processor: ESP32-WROOM-32E ULP-FSM · ESP8684-WROOM-01C none
- Bluetooth: ESP32-WROOM-32E BT Classic + BLE · ESP8684-WROOM-01C BLE 5.x
- Usable GPIO: ESP32-WROOM-32E 26 · ESP8684-WROOM-01C 14
- ADC: ESP32-WROOM-32E 18× 12-bit · ESP8684-WROOM-01C 5× 12-bit
- UART / SPI / I²C / I²S: ESP32-WROOM-32E 3 / 2 / 2 / 2 · ESP8684-WROOM-01C 2 / 1 / 1 / 0
- TWAI (CAN): ESP32-WROOM-32E Yes · ESP8684-WROOM-01C No
- SD/MMC: ESP32-WROOM-32E Yes · ESP8684-WROOM-01C No
- Ethernet MAC: ESP32-WROOM-32E Yes · ESP8684-WROOM-01C No
- Touch: ESP32-WROOM-32E 10 · ESP8684-WROOM-01C 0
- Deep sleep: ESP32-WROOM-32E 10 µA · ESP8684-WROOM-01C 5 µA
- Dimensions: ESP32-WROOM-32E 18 × 25.5 × 3.1 mm · ESP8684-WROOM-01C 16 × 24 × 3.1 mm
- Pin count: ESP32-WROOM-32E 38 · ESP8684-WROOM-01C 23
- Temp range: ESP32-WROOM-32E -40 to 85 °C · ESP8684-WROOM-01C -40 to 105 °C
- Crypto: ESP32-WROOM-32E AES, SHA, RSA, RNG · ESP8684-WROOM-01C ECC, SHA, RNG
Compute & memory
⚑ flag an error| ESP32-WROOM-32E | ESP8684-WROOM-01C | |
|---|---|---|
| CPU≠ | Xtensa LX6, 2-core | RISC-V, 1-core |
| Max clock≠ | 240 MHz | 120 MHz |
| SRAM≠ | 520 KB | 272 KB |
| ROM≠ | 448 KB | 576 KB |
| Flash options≠ | 4 / 8 / 16 MB | 2 / 4 MB |
| PSRAM≠ | 2 MB (quad) | None |
| Co-processor≠ | ULP-FSM | none |
Wireless
⚑ flag an error| ESP32-WROOM-32E | ESP8684-WROOM-01C | |
|---|---|---|
| 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-WROOM-32E | ESP8684-WROOM-01C | |
|---|---|---|
| Usable GPIO≠ | 26 | 14 |
| ADC≠ | 18× 12-bit | 5× 12-bit |
| USB | USB-Serial(external) | USB-Serial(external) |
| UART / SPI / I²C / I²S≠ | 3 / 2 / 2 / 2 | 2 / 1 / 1 / 0 |
| TWAI (CAN)≠ | Yes | No |
| SD/MMC≠ | Yes | No |
| Ethernet MAC≠ | Yes | No |
| Touch≠ | 10 | 0 |
Power
⚑ flag an error| ESP32-WROOM-32E | ESP8684-WROOM-01C | |
|---|---|---|
| Operating voltage | 3.0-3.6 V | 3.0-3.6 V |
| Deep sleep≠ | 10 µA | 5 µA |
Physical
⚑ flag an error| ESP32-WROOM-32E | ESP8684-WROOM-01C | |
|---|---|---|
| Dimensions≠ | 18 × 25.5 × 3.1 mm | 16 × 24 × 3.1 mm |
| Pin count≠ | 38 | 23 |
| Temp range≠ | -40 to 85 °C | -40 to 105 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP32-WROOM-32E | ESP8684-WROOM-01C | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, RNG | ECC, SHA, RNG |
| Digital signature | No | No |
| TRNG | Yes | Yes |