If this product is out of stock, you may consider buying the HK32F103C8T6 HK32 ARM Minimum System Development Board Blue Pill (STM32F103C8T6 Clone) which is a compatible clone.

The STM32F103C8T6, commonly known as the "Blue Pill," is a high-performance, low-power development board based on the ARM Cortex-M3 32-bit core. It is a powerful and affordable alternative to 8-bit microcontrollers, offering significantly more processing power, memory, and peripheral options for complex embedded projects.

Specifications

• Core: ARM 32-bit Cortex-M3 CPU.
• Clock Speed: 72MHz maximum frequency.
• Memory: 64KB Flash memory and 20KB SRAM.
• Operating Voltage: 2.0V to 3.6V DC (Onboard 3.3V regulator included).
• I/O Pins: 37 GPIO pins (most are 5V tolerant).
• Timers: 3 General-purpose timers and 1 Advanced-control timer.
• Communication: 2x I2C, 2x SPI, 3x USART, 1x USB 2.0 Full Speed, and 1x CAN 2.0B.
• ADC: 2x 12-bit Analog-to-Digital Converters (up to 10 channels).
• Debug Mode: Serial Wire Debug (SWD) interface.

Features

• Processing Power: The 32-bit architecture and 72MHz clock speed allow it to handle tasks like real-time motor control or complex math far better than standard 8-bit boards.
• USB Support: Features an onboard Micro-USB connector for power and communication (requires a bootloader for direct programming via USB).
• Onboard RTC: Includes a built-in Real-Time Clock (RTC) with a dedicated battery pin (VBAT) for time-keeping applications.
• Compact Form Factor: The "DIP" style pinout allows it to be plugged directly into a breadboard for rapid prototyping.
• Jumpers for Boot Selection: Two onboard jumpers (BOOT0 and BOOT1) allow you to switch between Flash, System Memory, or SRAM boot modes.

Pin and Header Guide

• V3 / GND: 3.3V Power and Ground.
• 5V: 5V Input (regulated down to 3.3V for the chip).
• B0+ / B1-: Boot mode selection jumpers.
• SWDIO / SWCLK: Pins used for programming and debugging via an ST-Link V2.
• PA0–PA15 / PB0–PB15: General Purpose I/O pins with alternate functions like PWM, ADC, and SPI.
• Reset Button: Onboard button to manually restart the microcontroller.

Common Applications

• Robotics: Controlling multiple servos and high-speed motor drivers.
• IoT Gateways: Handling data from various sensors and communicating via WiFi or LoRa modules.
• Industrial Automation: Interfacing with CAN bus systems and high-speed data logging.
• USB Peripherals: Creating custom HID devices like keyboards or joysticks.

Usage Tips

• Programming: Unlike Arduino, the Blue Pill is typically programmed using an ST-Link V2 programmer via the 4-pin SWD header. It can also be programmed via Serial (UART1) using a USB-to-TTL adapter.
• USB Port Usage: In many versions, the Micro-USB port is only for power and serial communication by default. To upload code directly through this port, you must first flash a "STM32duino" bootloader.
• Powering the Board: Always ensure you are providing a stable 5V to the 5V pin or 3.3V to the 3.3V pin. Do not apply 5V directly to the 3.3V pin as it will damage the MCU.
• 5V Tolerance: While the MCU is 3.3V, many of the I/O pins are "5V tolerant," meaning they can safely read 5V digital signals without a level shifter. Check the pinout map for specific markings.