ESP32-C3 SuperMini
Also known as: ESP32-C3 SuperMini · C3 Super Mini · ESP32-C3 0.42 OLED
Dirt-cheap, thumbnail-sized RISC-V board with USB-C and BLE 5, ideal for sensors, beacons and one-off projects. The 0.42" OLED variant was the top affiliate seller.
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At a glance
⚑ flag an error| SoC | ESP32-C3 |
|---|---|
| Vendor | Generic / multiple |
| Type | Tiny / minimal |
| Memory | 4 MB flash |
| Display | 0.42" 72x40 (SSD1306 (OLED variant)) |
| Connectivity | Wi-Fi, BLE 5 |
| USB | USB-C |
| Battery | No |
| Typical price | $2-4 (street, varies) |
Good for
Gotchas to know
- The onboard ceramic antenna has well-documented weak Wi-Fi range/sensitivity on many clones.
- GPIO8/9 are strapping pins (affect boot).
- Single-core RISC-V; clone quality varies.
- OLED variant: 0.42" 72x40 over I2C (very small).
Variants
Plain (no display) and 0.42" OLED versions; several near-identical clones and a 'Plus/v2' revision.
The ESP32-C3 inside
This board is built on the ESP32-C3 . See the SoC page for the full peripheral, GPIO and security details.
Bare modules on the same SoC:
Resources
Community guides usually go deeper than this page: pinout diagrams, wiring, library setup and copy-paste example code from people who build with these boards daily.