ESP32-C3 SuperMini – WiFi + Bluetooth 5 Dev Board (USB-C, Pre-Soldered)
1 Pack - ($9.99 ea)
$9.99 NZD
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$9.99 NZD
ESP32-C3 SuperMini – WiFi + Bluetooth 5 Dev Board (USB-C, Pre-Soldered)
Each unit:
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Urban $40
Rural $60
The ESP32-C3 SuperMini is a thumb-sized IoT development board built around the Espressif ESP32-C3, a 32-bit RISC-V single-core chip running at up to 160 MHz. It packs 2.4GHz WiFi and Bluetooth 5 (LE) onto a board just 22.5 x 18 mm, with a USB-C port, an onboard PCB antenna, and pre-soldered headers ready for the breadboard. Ideal for compact IoT, sensor, and wireless projects where space is tight.
- ESP32-C3 32-bit RISC-V single core, up to 160 MHz
- 2.4GHz WiFi (802.11 b/g/n) and Bluetooth 5 (LE)
- USB-C connector with pre-soldered headers
- 4 MB flash, 400 KB SRAM, 384 KB ROM
- 11x GPIO (PWM), 4x ADC, I2C, SPI, 2x UART
- Deep sleep current around 43 uA
- Tiny 22.5 x 18 mm board with onboard PCB antenna
- Works with Arduino IDE, PlatformIO, MicroPython and ESPHome
Getting Started in the Arduino IDE
1
Install the ESP32 package
Open Boards Manager, search "esp32" by Espressif, and install it.
2
Select the board
Go to Tools, then Board, and choose "ESP32C3 Dev Module".
3
Plug in over USB-C
Connect a USB-C data cable and pick the COM port that appears under Tools, then Port.
4
Upload your sketch
Hit upload. If it will not connect, hold BOOT, tap RESET, then release BOOT to force download mode.
Good to know: The onboard blue LED is wired to GPIO8. Set it as an output in code to use it as a status indicator. A USB-C data cable is not included.
Specifications
ChipEspressif ESP32-C3 (ESP32-C3FN4)
CPU32-bit RISC-V single core, up to 160 MHz
WiFi2.4GHz 802.11 b/g/n (Station, SoftAP, SoftAP+Station)
BluetoothBluetooth 5 (LE)
Flash4 MB (embedded)
SRAM400 KB
ROM384 KB
Digital I/O11x GPIO, all PWM capable
Analog Inputs4x ADC
Serial Interfaces1x I2C, 1x SPI, 2x UART
USBUSB-C
Operating Voltage3.3V
Deep Sleep CurrentApproximately 43 uA
AntennaOnboard PCB antenna
Onboard LEDBlue, on GPIO8
ButtonsReset and Boot
SecurityAES-128/256, RSA, HMAC, digital signature, secure boot
Dimensions22.5 x 18 mm
Please note: The headers come pre-soldered (the welded version). Minor measurement deviation is normal for this form factor.
Pinout
Power In5V pin (from USB or external 5V), onboard regulator to 3.3V
3V3Regulated 3.3V output for sensors and peripherals
GNDGround
Digital / PWM11 usable GPIO, every pin PWM capable
ADC4 analog inputs (GPIO0 to GPIO4 range)
I2CDefault SDA GPIO8, SCL GPIO9 (remappable)
SPIHardware SPI, pins assignable in software
UART2x hardware UART
Onboard LEDGPIO8 (active low on most SuperMini boards)
The ESP32-C3 uses a flexible GPIO matrix, so I2C, SPI and UART can be mapped to most pins in software rather than being fixed. GPIO2, GPIO8 and GPIO9 are strapping pins read at boot, so avoid pulling them externally during startup. Logic is 3.3V, so use a level shifter when interfacing with 5V devices.
Tip: Pin labels are printed on the underside of the board. A full annotated pinout for the ESP32-C3 SuperMini is widely available online if you need every alternate function.
What's Included
1x
ESP32-C3 SuperMini Board
Per single unit. The 5 Pack and 10 Pack contain 5 and 10 boards respectively.
Set
Pre-Soldered Male Headers
Header pins come attached and ready to drop straight into a breadboard.
Please note: A USB-C cable is not included. Any standard USB-C data cable (not charge-only) will work for power and programming.
Common Uses
Home automation and smart home sensor nodes (ESPHome, Home Assistant)
Battery-powered IoT sensors that lean on the low deep-sleep current
WiFi or Bluetooth wearables and other space-constrained projects
Web servers, MQTT clients and REST API connected devices
Bluetooth LE beacons, remotes and proximity projects
A compact drop-in where a full ESP32 or NodeMCU is too bulky
Good to know: The single-core RISC-V chip handles WiFi, BLE and most sensor workloads comfortably while sipping power in deep sleep.
Common Questions
Is this an actual Arduino board?
No. It is an Espressif ESP32-C3 board, not an Arduino-brand product. "Arduino compatible" just means you program it through the free Arduino IDE: install the ESP32 package by Espressif and select "ESP32C3 Dev Module". It also works in PlatformIO and runs MicroPython and ESPHome.
Does it need an external antenna?
No. The SuperMini has an onboard PCB antenna and works out of the box. This version has no external antenna connector.
Are the header pins soldered on?
Yes. This is the welded (pre-soldered) version, so the male headers are already attached and ready for a breadboard.
How do I power it from a battery?
Feed regulated 3.3V into the 3V3 pin, or 5V into the 5V pin to use the onboard regulator. Deep sleep draws around 43 uA, which suits battery projects.
Why will my sketch not upload?
Use a USB-C data cable rather than a charge-only one, and if needed hold BOOT, tap RESET, then release BOOT to enter download mode before uploading.
Please note: Actual board colour may vary slightly from the photos depending on your screen.