ESP32-WROOM-32E vs ESP8684-WROOM-03
ESP32-WROOM-32E
WROOM · ESP32 · Active
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ESP8684-WROOM-03
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 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-03 if you need
- smaller footprint (15×17.3 mm)
Size, to scale
- ESP32-WROOM-32E: 18×25.5 mm
- ESP8684-WROOM-03: 15×17.3 mm
Spec differences at a glance
- CPU: ESP32-WROOM-32E Xtensa LX6, 2-core · ESP8684-WROOM-03 RISC-V, 1-core
- Max clock: ESP32-WROOM-32E 240 MHz · ESP8684-WROOM-03 120 MHz
- SRAM: ESP32-WROOM-32E 520 KB · ESP8684-WROOM-03 272 KB
- ROM: ESP32-WROOM-32E 448 KB · ESP8684-WROOM-03 576 KB
- Flash options: ESP32-WROOM-32E 4 / 8 / 16 MB · ESP8684-WROOM-03 2 / 4 MB
- PSRAM: ESP32-WROOM-32E 2 MB (quad) · ESP8684-WROOM-03 None
- Co-processor: ESP32-WROOM-32E ULP-FSM · ESP8684-WROOM-03 none
- Bluetooth: ESP32-WROOM-32E BT Classic + BLE · ESP8684-WROOM-03 BLE 5.x
- Usable GPIO: ESP32-WROOM-32E 26 · ESP8684-WROOM-03 8
- ADC: ESP32-WROOM-32E 18× 12-bit · ESP8684-WROOM-03 5× 12-bit
- UART / SPI / I²C / I²S: ESP32-WROOM-32E 3 / 2 / 2 / 2 · ESP8684-WROOM-03 2 / 1 / 1 / 0
- TWAI (CAN): ESP32-WROOM-32E Yes · ESP8684-WROOM-03 No
- SD/MMC: ESP32-WROOM-32E Yes · ESP8684-WROOM-03 No
- Ethernet MAC: ESP32-WROOM-32E Yes · ESP8684-WROOM-03 No
- Touch: ESP32-WROOM-32E 10 · ESP8684-WROOM-03 0
- Deep sleep: ESP32-WROOM-32E 10 µA · ESP8684-WROOM-03 5 µA
- Dimensions: ESP32-WROOM-32E 18 × 25.5 × 3.1 mm · ESP8684-WROOM-03 15 × 17.3 × 2.8 mm
- Pin count: ESP32-WROOM-32E 38 · ESP8684-WROOM-03 11
- Temp range: ESP32-WROOM-32E -40 to 85 °C · ESP8684-WROOM-03 -40 to 105 °C
- Crypto: ESP32-WROOM-32E AES, SHA, RSA, RNG · ESP8684-WROOM-03 ECC, SHA, RNG
Compute & memory
⚑ flag an error| ESP32-WROOM-32E | ESP8684-WROOM-03 | |
|---|---|---|
| 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-03 | |
|---|---|---|
| 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-03 | |
|---|---|---|
| Usable GPIO≠ | 26 | 8 |
| 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-03 | |
|---|---|---|
| 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-03 | |
|---|---|---|
| Dimensions≠ | 18 × 25.5 × 3.1 mm | 15 × 17.3 × 2.8 mm |
| Pin count≠ | 38 | 11 |
| 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-03 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, RNG | ECC, SHA, RNG |
| Digital signature | No | No |
| TRNG | Yes | Yes |