Comparison between STM32F103C8T6 and Arduino UNO

Parameter	STM32F103C8T6 (Blue Pill)	Arduino UNO
Processor	STM32F103C8T6	ATMega328P
Operating Voltage	3.3V	5V
CPU Speed	72 MHz	16 MHz
Analog pins	10	8
Digital I/O or PWM	37	14
EEPROM/SRAM (KB)	NA/20	1/2
Flash Memory	64/128 KB	32 KB
USB Conector	Micro	Type B
UART	3	1
SPI	2	1
I²C	2	1