STM32 Blue Pill

The STM32 “Blue Pill” is a small, low-cost development board based on the STM32F103C8T6 microcontroller from STMicroelectronics, featuring a 32-bit ARM Cortex-M3 processor. It offers significantly more performance than typical 8-bit boards, with higher clock speeds, more memory, and a wide range of peripherals such as GPIO, ADC, timers, SPI, I2C, and UART. Its compact size and affordability make it popular for embedded systems, robotics, and real-time applications, though it often requires a bit more setup and familiarity with development tools compared to beginner-friendly boards like Arduino.