ESP32-C3-MINI-1 vs ESP8684-WROOM-03
ESP32-C3-MINI-1
MINI · ESP32-C3 · 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-C3 vs ESP32-C2), so they differ in CPU, wireless and peripherals, not just packaging.
Choose ESP32-C3-MINI-1 if you need
- higher clock (160 MHz)
- more usable GPIO (15 vs 8)
- smaller footprint (13.2×16.6 mm)
Choose ESP8684-WROOM-03 if you need
no standout advantage over ESP32-C3-MINI-1; it trades on the points opposite.
Size, to scale
- ESP32-C3-MINI-1: 13.2×16.6 mm
- ESP8684-WROOM-03: 15×17.3 mm
Spec differences at a glance
- Max clock: ESP32-C3-MINI-1 160 MHz · ESP8684-WROOM-03 120 MHz
- SRAM: ESP32-C3-MINI-1 400 KB · ESP8684-WROOM-03 272 KB
- ROM: ESP32-C3-MINI-1 384 KB · ESP8684-WROOM-03 576 KB
- Flash options: ESP32-C3-MINI-1 4 MB · ESP8684-WROOM-03 2 / 4 MB
- Usable GPIO: ESP32-C3-MINI-1 15 · ESP8684-WROOM-03 8
- ADC: ESP32-C3-MINI-1 6× 12-bit · ESP8684-WROOM-03 5× 12-bit
- USB: ESP32-C3-MINI-1 USB-Serial-JTAG · ESP8684-WROOM-03 USB-Serial(external)
- UART / SPI / I²C / I²S: ESP32-C3-MINI-1 2 / 1 / 1 / 1 · ESP8684-WROOM-03 2 / 1 / 1 / 0
- TWAI (CAN): ESP32-C3-MINI-1 Yes · ESP8684-WROOM-03 No
- Dimensions: ESP32-C3-MINI-1 13.2 × 16.6 × 2.4 mm · ESP8684-WROOM-03 15 × 17.3 × 2.8 mm
- Pin count: ESP32-C3-MINI-1 53 · ESP8684-WROOM-03 11
- Temp range: ESP32-C3-MINI-1 -40 to 85 °C · ESP8684-WROOM-03 -40 to 105 °C
- Crypto: ESP32-C3-MINI-1 AES, SHA, RSA, HMAC, RNG · ESP8684-WROOM-03 ECC, SHA, RNG
- Digital signature: ESP32-C3-MINI-1 Yes · ESP8684-WROOM-03 No
Compute & memory
⚑ flag an error| ESP32-C3-MINI-1 | ESP8684-WROOM-03 | |
|---|---|---|
| CPU | RISC-V, 1-core | RISC-V, 1-core |
| Max clock≠ | 160 MHz | 120 MHz |
| SRAM≠ | 400 KB | 272 KB |
| ROM≠ | 384 KB | 576 KB |
| Flash options≠ | 4 MB | 2 / 4 MB |
| PSRAM | None | None |
| Co-processor | none | none |
Wireless
⚑ flag an error| ESP32-C3-MINI-1 | ESP8684-WROOM-03 | |
|---|---|---|
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Wi-Fi bands | 2.4GHz | 2.4GHz |
| Bluetooth | BLE 5.x | BLE 5.x |
| 802.15.4 (Thread/Zigbee) | No | No |
| Antenna | PCB | PCB |
Peripherals & I/O
⚑ flag an error| ESP32-C3-MINI-1 | ESP8684-WROOM-03 | |
|---|---|---|
| Usable GPIO≠ | 15 | 8 |
| ADC≠ | 6× 12-bit | 5× 12-bit |
| USB≠ | USB-Serial-JTAG | USB-Serial(external) |
| UART / SPI / I²C / I²S≠ | 2 / 1 / 1 / 1 | 2 / 1 / 1 / 0 |
| TWAI (CAN)≠ | Yes | No |
| SD/MMC | No | No |
| Ethernet MAC | No | No |
| Touch | 0 | 0 |
Power
⚑ flag an error| ESP32-C3-MINI-1 | ESP8684-WROOM-03 | |
|---|---|---|
| Operating voltage | 3.0-3.6 V | 3.0-3.6 V |
| Deep sleep | 5 µA | 5 µA |
Physical
⚑ flag an error| ESP32-C3-MINI-1 | ESP8684-WROOM-03 | |
|---|---|---|
| Dimensions≠ | 13.2 × 16.6 × 2.4 mm | 15 × 17.3 × 2.8 mm |
| Pin count≠ | 53 | 11 |
| Temp range≠ | -40 to 85 °C | -40 to 105 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP32-C3-MINI-1 | 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 |