ESP8684-WROOM-01C vs ESP8684-WROOM-03
ESP8684-WROOM-01C
WROOM · ESP32-C2 · 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?
Both are built on the same ESP32-C2 SoC, so CPU and radios are identical; the choice is about memory, form factor and antenna.
These two are closely matched on the spec sheet, so decide on price, availability and which footprint fits your board.
Size, to scale
- ESP8684-WROOM-01C: 16×24 mm
- ESP8684-WROOM-03: 15×17.3 mm
Spec differences at a glance
- Usable GPIO: ESP8684-WROOM-01C 14 · ESP8684-WROOM-03 8
- Dimensions: ESP8684-WROOM-01C 16 × 24 × 3.1 mm · ESP8684-WROOM-03 15 × 17.3 × 2.8 mm
- Pin count: ESP8684-WROOM-01C 23 · ESP8684-WROOM-03 11
Compute & memory
⚑ flag an error| ESP8684-WROOM-01C | ESP8684-WROOM-03 | |
|---|---|---|
| CPU | RISC-V, 1-core | RISC-V, 1-core |
| Max clock | 120 MHz | 120 MHz |
| SRAM | 272 KB | 272 KB |
| ROM | 576 KB | 576 KB |
| Flash options | 2 / 4 MB | 2 / 4 MB |
| PSRAM | None | None |
| Co-processor | none | none |
Wireless
⚑ flag an error| ESP8684-WROOM-01C | 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| ESP8684-WROOM-01C | ESP8684-WROOM-03 | |
|---|---|---|
| Usable GPIO≠ | 14 | 8 |
| ADC | 5× 12-bit | 5× 12-bit |
| USB | USB-Serial(external) | USB-Serial(external) |
| UART / SPI / I²C / I²S | 2 / 1 / 1 / 0 | 2 / 1 / 1 / 0 |
| TWAI (CAN) | No | No |
| SD/MMC | No | No |
| Ethernet MAC | No | No |
| Touch | 0 | 0 |
Power
⚑ flag an error| ESP8684-WROOM-01C | 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| ESP8684-WROOM-01C | ESP8684-WROOM-03 | |
|---|---|---|
| Dimensions≠ | 16 × 24 × 3.1 mm | 15 × 17.3 × 2.8 mm |
| Pin count≠ | 23 | 11 |
| Temp range | -40 to 105 °C | -40 to 105 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP8684-WROOM-01C | ESP8684-WROOM-03 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto | ECC, SHA, RNG | ECC, SHA, RNG |
| Digital signature | No | No |
| TRNG | Yes | Yes |