This is an IoT mini development board based on the Espressif ESP32-C3 Wi-Fi and Bluetooth dual-mode chip. The ESP32-C3 features a 32-bit RISC-V CPU with an FPU (Floating-Point Unit), capable of performing 32-bit single-precision operations and delivering powerful computing performance. It offers excellent RF performance and supports IEEE 802.11 b/g/n Wi-Fi and Bluetooth 5 (LE) protocols. The board comes with an external antenna to enhance signal strength for wireless applications. It also features a compact and refined form factor with a single-sided surface-mount design. The board is equipped with a rich set of interfaces, including 11 digital I/O pins that can be used as PWM pins and 4 analog I/O pins that can be used as ADC pins. It supports four serial communication interfaces, including UART, I2C, and SPI. The board also features a small Reset button and a Bootloader mode button.

With these features, the board is positioned as a high-performance, low-power, and cost-effective IoT mini development board, suitable for low-power IoT applications and wireless wearable devices.

* Powerful CPU: ESP32-C3, 32-bit RISC-V single-core processor running at up to 160MHz.

* Wi-Fi: Supports IEEE 802.11 b/g/n at 2.4GHz, including Station mode, SoftAP mode, SoftAP + Station mode, and promiscuous mode.

* Bluetooth: Bluetooth 5.0.

* Ultra-Low Power Consumption: Deep-sleep power consumption of approximately 43μA.

* Rich Onboard Resources: 400KB SRAM, 384KB ROM, and 4MB built-in Flash memory.

* Chip Model: ESP32C3FN4.

* Ultra-Compact Size: Measures just 22.52 x 18mm, featuring a compact, thumb-sized design ideal for wearable devices and small-scale projects.

* Reliable Security Features: Hardware cryptographic acceleration supporting AES-128/256, hashing, RSA, HMAC, digital signatures, and secure boot.

* Versatile Interfaces: 1 x I2C, 1 x SPI, 2 x UART, 11 x GPIO (PWM), and 4 x ADC.

* Single-Sided Design: Single-sided component placement with a surface-mount design.

* Onboard Blue LED: Connected to GPIO8.

* To power the board using an external power supply, connect the positive (+) terminal to the 5V pin and the negative (-) terminal to GND. The board supports an input voltage range of 3.3-6V.

* Important: Do not connect the USB cable while using an external power supply. USB power and external power must be used separately. Select only one power source at a time.

* Press and hold the BOOT button of the ESP32-C3, then press the RESET button, release the RESET button, and finally release the BOOT button. At this time, the ESP32-C3 will enter download mode. (It is necessary to re-enter download mode every time you connect. Sometimes pressing it once may cause the port to be unstable and disconnect, which can be determined by the port recognition sound.)

* 1 x Board

* Package weight: 0.15kg

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