C3-Mini
A mini Wifi & Bluetooth5 (LE) board based on ESP32-C3FH4.
For flashing C3-Mini successfully, you need to hold the BOOT-Button, click in parallel the RST-Button for a moment while still keeping BOOT button pressed and then start WebFlashing. Once Flashing started you can release the BOOT-Button. Whenever you want to quick change a sensor, do the same procedure. We know this is tedious, compared to old ESP8266 / ESP32 boards. Therefore we work on convenience measures against it.
| Operating Voltage | 3.3V |
| Digital I/O Pins | 12 |
| Clock Speed | 160MHz |
| Flash | 4M Bytes |
| Size | 34.3*25.4mm |
| Weight | 2.6g |
The C3-mini, particularly the Carenuity C3 Mini, is a compact microcontroller that's quite versatile due to its features like WiFi and Bluetooth LE capabilities, a RISC-V Single-Core CPU, and compatibility with various programming environments such as MicroPython, Arduino, and CircuitPython12. Carenuity even supports install-for-free applications for the EcoSystems: CloudFree, Home Assistant, IoT AppStore and Matter/ESPZero.
Applications for the plain C3-mini 'standalone', no Display or Sensor required
Grab your plain C3-Mini and build your own device within 3 minutes, by installing the popular WLED-Application, the helpful GPIO-Viewer or a plain “empty” ESPHome device for Home Assistant with no special features built-in. Ready to make it your own.
Applications for the C3-mini with Display
Grab your C3-Mini and build your own device within 3 minutes, by attaching a display [buy here] to enable applications like a WiFi Signal Strength Meter, a Weather-Station or a YouTube-Counter for Followers and Likes.
Applications for the C3-mini with Sensor & Display
Grab your C3-Mini and build your own device within 3 minutes, by free installing various sensor applications like a Barometer, Hygrometer, Luxmeter or Motion Detector.
What is the difference between the D1- and the C3-Mini?
The two super popular boards, the D1 and C3-Mini share the same footprint and pinout, making them a perfect fit for the world's largest sensor and actuator portfolio, which includes Mikroe's sensors by adapters.
The improvements to the C3-Mini are shown in the following illustration:
Evolution of the popular footprint and pinout
The ESP32-Mini was the successor of the D1-Mini, comes with added Bluetooth and is now the predecessor of the latest C3-Mini™, which we recommend to stay future proof with respect to the upcoming Matter standard.
This selection box eases the setup for you to test the 7 featured sensors.
Install For Free (7 Devices)Build your own device within seconds:
GPIO Viewer: Monitor GPIO pins on your browser
WLED: C3-Mini WLED Installer
YouTube Meter: YouTube Channel Statistics Meter with C3-Mini
Solution Builder Widgets
The QUICK CHANGE allows to easily get the right device for your actual need.
All you do is replacing the one sensor by plugging-in the desired, following the illustration for installing the new device.
From this Modular C3-Mini™ Sensor Selection Box you select one of the 7 sensors, which you combine with the C3-Mini microcontroller and the OLED display on the Triple-Adapter, as illustrated and install the selected application:
Install For FreeOnce you want to buy more parts or spare parts, be it sensors or microcontrollers, you find a good offer in the ChipGlobe WebShop:
Buy C3-Mini PartsSupported EcoSystems
