The classic Cortex-M3 minimum system board in the C6 version – headers included
The Blue Pill form factor on the smaller C6T6 chip: same pinout, same 53 × 23 mm board, same 72 MHz Cortex-M3 with USB, CAN, 2 × SPI, 2 × I2C, 2 × USART, 10 × 12-bit ADC and timers – but 32 KB of flash and 10 KB of RAM, which is plenty for sensor nodes, motor controllers and small USB devices, and it costs less than the C8. Program over the 4-pin SWD header with an ST-LINK V2, over USART1 with the BOOT0 jumper, or from the Arduino IDE with the STM32duino core. Note: the C6 does not fit builds made for the C8T6 that need more than 32 KB. Headers supplied loose.
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