ESP32-C3-WROOM-02 vs ESP32-C61-WROOM-1
ESP32-C3-WROOM-02
WROOM · ESP32-C3 · Active
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ESP32-C61-WROOM-1
WROOM · ESP32-C61 · New
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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-C61), so they differ in CPU, wireless and peripherals, not just packaging.
Choose ESP32-C3-WROOM-02 if you need
- smaller footprint (18×20 mm)
Choose ESP32-C61-WROOM-1 if you need
- Wi-Fi 6: better battery life and throughput in busy networks
- PSRAM for camera frames, audio buffers and LVGL/large displays
- more usable GPIO (23 vs 15)
Size, to scale
- ESP32-C3-WROOM-02: 18×20 mm
- ESP32-C61-WROOM-1: 18×25.5 mm
Spec differences at a glance
- SRAM: ESP32-C3-WROOM-02 400 KB · ESP32-C61-WROOM-1 320 KB
- ROM: ESP32-C3-WROOM-02 384 KB · ESP32-C61-WROOM-1 256 KB
- Flash options: ESP32-C3-WROOM-02 4 / 8 / 16 MB · ESP32-C61-WROOM-1 8 / 16 MB
- PSRAM: ESP32-C3-WROOM-02 None · ESP32-C61-WROOM-1 2 / 8 MB (quad)
- Wi-Fi: ESP32-C3-WROOM-02 Wi-Fi 4 · ESP32-C61-WROOM-1 Wi-Fi 6
- Usable GPIO: ESP32-C3-WROOM-02 15 · ESP32-C61-WROOM-1 23
- ADC: ESP32-C3-WROOM-02 6× 12-bit · ESP32-C61-WROOM-1 4× 12-bit
- UART / SPI / I²C / I²S: ESP32-C3-WROOM-02 2 / 1 / 1 / 1 · ESP32-C61-WROOM-1 3 / 1 / 1 / 1
- TWAI (CAN): ESP32-C3-WROOM-02 Yes · ESP32-C61-WROOM-1 No
- SD/MMC: ESP32-C3-WROOM-02 No · ESP32-C61-WROOM-1 Yes
- Deep sleep: ESP32-C3-WROOM-02 5 µA · ESP32-C61-WROOM-1 10 µA
- Dimensions: ESP32-C3-WROOM-02 18 × 20 × 3.2 mm · ESP32-C61-WROOM-1 18 × 25.5 × 3.1 mm
- Pin count: ESP32-C3-WROOM-02 19 · ESP32-C61-WROOM-1 29
- Lifecycle: ESP32-C3-WROOM-02 Active · ESP32-C61-WROOM-1 New
- Crypto: ESP32-C3-WROOM-02 AES, SHA, RSA, HMAC, RNG · ESP32-C61-WROOM-1 AES, SHA, ECC, ECDSA, RNG
Compute & memory
⚑ flag an error| ESP32-C3-WROOM-02 | ESP32-C61-WROOM-1 | |
|---|---|---|
| CPU | RISC-V, 1-core | RISC-V, 1-core |
| Max clock | 160 MHz | 160 MHz |
| SRAM≠ | 400 KB | 320 KB |
| ROM≠ | 384 KB | 256 KB |
| Flash options≠ | 4 / 8 / 16 MB | 8 / 16 MB |
| PSRAM≠ | None | 2 / 8 MB (quad) |
| Co-processor | none | none |
Wireless
⚑ flag an error| ESP32-C3-WROOM-02 | ESP32-C61-WROOM-1 | |
|---|---|---|
| Wi-Fi≠ | Wi-Fi 4 | Wi-Fi 6 |
| 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-WROOM-02 | ESP32-C61-WROOM-1 | |
|---|---|---|
| Usable GPIO≠ | 15 | 23 |
| ADC≠ | 6× 12-bit | 4× 12-bit |
| USB | USB-Serial-JTAG | USB-Serial-JTAG |
| UART / SPI / I²C / I²S≠ | 2 / 1 / 1 / 1 | 3 / 1 / 1 / 1 |
| TWAI (CAN)≠ | Yes | No |
| SD/MMC≠ | No | Yes |
| Ethernet MAC | No | No |
| Touch | 0 | 0 |
Power
⚑ flag an error| ESP32-C3-WROOM-02 | ESP32-C61-WROOM-1 | |
|---|---|---|
| Operating voltage | 3.0-3.6 V | 3.0-3.6 V |
| Deep sleep≠ | 5 µA | 10 µA |
Physical
⚑ flag an error| ESP32-C3-WROOM-02 | ESP32-C61-WROOM-1 | |
|---|---|---|
| Dimensions≠ | 18 × 20 × 3.2 mm | 18 × 25.5 × 3.1 mm |
| Pin count≠ | 19 | 29 |
| Temp range | -40 to 85 °C | -40 to 85 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle≠ | Active | New |
Security
⚑ flag an error| ESP32-C3-WROOM-02 | ESP32-C61-WROOM-1 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, HMAC, RNG | AES, SHA, ECC, ECDSA, RNG |
| Digital signature | Yes | Yes |
| TRNG | Yes | Yes |