ESP32-C3-MINI-1 vs ESP32-SOLO-1
ESP32-C3-MINI-1
MINI · ESP32-C3 · Active
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ESP32-SOLO-1
SOLO · ESP32 · 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), so they differ in CPU, wireless and peripherals, not just packaging.
Choose ESP32-C3-MINI-1 if you need
- smaller footprint (13.2×16.6 mm)
Choose ESP32-SOLO-1 if you need
- Bluetooth Classic (BR/EDR) for legacy SPP / A2DP audio
- faster CPU (240 MHz, Xtensa LX6)
- Ethernet MAC for wired networking (add an external PHY)
- more usable GPIO (32 vs 15)
Size, to scale
- ESP32-C3-MINI-1: 13.2×16.6 mm
- ESP32-SOLO-1: 18×25.5 mm
Spec differences at a glance
- CPU: ESP32-C3-MINI-1 RISC-V, 1-core · ESP32-SOLO-1 Xtensa LX6, 1-core
- Max clock: ESP32-C3-MINI-1 160 MHz · ESP32-SOLO-1 240 MHz
- SRAM: ESP32-C3-MINI-1 400 KB · ESP32-SOLO-1 520 KB
- ROM: ESP32-C3-MINI-1 384 KB · ESP32-SOLO-1 448 KB
- Co-processor: ESP32-C3-MINI-1 none · ESP32-SOLO-1 ULP-FSM
- Bluetooth: ESP32-C3-MINI-1 BLE 5.x · ESP32-SOLO-1 BT Classic + BLE
- Usable GPIO: ESP32-C3-MINI-1 15 · ESP32-SOLO-1 32
- ADC: ESP32-C3-MINI-1 6× 12-bit · ESP32-SOLO-1 18× 12-bit
- USB: ESP32-C3-MINI-1 USB-Serial-JTAG · ESP32-SOLO-1 USB-Serial(external)
- UART / SPI / I²C / I²S: ESP32-C3-MINI-1 2 / 1 / 1 / 1 · ESP32-SOLO-1 3 / 2 / 2 / 2
- SD/MMC: ESP32-C3-MINI-1 No · ESP32-SOLO-1 Yes
- Ethernet MAC: ESP32-C3-MINI-1 No · ESP32-SOLO-1 Yes
- Touch: ESP32-C3-MINI-1 0 · ESP32-SOLO-1 10
- Deep sleep: ESP32-C3-MINI-1 5 µA · ESP32-SOLO-1 10 µA
- Dimensions: ESP32-C3-MINI-1 13.2 × 16.6 × 2.4 mm · ESP32-SOLO-1 18 × 25.5 × 3.1 mm
- Pin count: ESP32-C3-MINI-1 53 · ESP32-SOLO-1 38
- Crypto: ESP32-C3-MINI-1 AES, SHA, RSA, HMAC, RNG · ESP32-SOLO-1 AES, SHA, RSA, RNG
- Digital signature: ESP32-C3-MINI-1 Yes · ESP32-SOLO-1 No
Compute & memory
⚑ flag an error| ESP32-C3-MINI-1 | ESP32-SOLO-1 | |
|---|---|---|
| CPU≠ | RISC-V, 1-core | Xtensa LX6, 1-core |
| Max clock≠ | 160 MHz | 240 MHz |
| SRAM≠ | 400 KB | 520 KB |
| ROM≠ | 384 KB | 448 KB |
| Flash options | 4 MB | 4 MB |
| PSRAM | None | None |
| Co-processor≠ | none | ULP-FSM |
Wireless
⚑ flag an error| ESP32-C3-MINI-1 | ESP32-SOLO-1 | |
|---|---|---|
| Wi-Fi | Wi-Fi 4 | Wi-Fi 4 |
| Wi-Fi bands | 2.4GHz | 2.4GHz |
| Bluetooth≠ | BLE 5.x | BT Classic + BLE |
| 802.15.4 (Thread/Zigbee) | No | No |
| Antenna | PCB | PCB |
Peripherals & I/O
⚑ flag an error| ESP32-C3-MINI-1 | ESP32-SOLO-1 | |
|---|---|---|
| Usable GPIO≠ | 15 | 32 |
| ADC≠ | 6× 12-bit | 18× 12-bit |
| USB≠ | USB-Serial-JTAG | USB-Serial(external) |
| UART / SPI / I²C / I²S≠ | 2 / 1 / 1 / 1 | 3 / 2 / 2 / 2 |
| TWAI (CAN) | Yes | Yes |
| SD/MMC≠ | No | Yes |
| Ethernet MAC≠ | No | Yes |
| Touch≠ | 0 | 10 |
Power
⚑ flag an error| ESP32-C3-MINI-1 | ESP32-SOLO-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-MINI-1 | ESP32-SOLO-1 | |
|---|---|---|
| Dimensions≠ | 13.2 × 16.6 × 2.4 mm | 18 × 25.5 × 3.1 mm |
| Pin count≠ | 53 | 38 |
| Temp range | -40 to 85 °C | -40 to 85 °C |
| Mounting | SMD castellated | SMD castellated |
| Lifecycle | Active | Active |
Security
⚑ flag an error| ESP32-C3-MINI-1 | ESP32-SOLO-1 | |
|---|---|---|
| Secure boot | Yes | Yes |
| Flash encryption | Yes | Yes |
| Crypto≠ | AES, SHA, RSA, HMAC, RNG | AES, SHA, RSA, RNG |
| Digital signature≠ | Yes | No |
| TRNG | Yes | Yes |