The STM8S003F3P6 is an 8-bit microcontroller manufactured by STMicroelectronics and is part of the 8-bit MCU Value Line 16 Mhz 8kb FL 128EE that is based on the STM8 processor core. This MCU is designed for a wide range of applications and utilizes an efficient Harvard architecture with improved 8051-compatible instruction set and many other features. It offers a variety of communication interfaces, including I2C, SPI, USART as well as analog-to-digital converters and several timers and counters, low-power modes, and a flexible GPIO. The device is also integrated with an external EDE2UGB Flash memory of 8K bytes,a 128k EEPROM with endurance up to 100000 write cycle and 16-bit wide data storage, which allows users to store large amounts of data. Additionally, the STM8S003F3P6 offers a wide range of on-chip peripherals such as the watchdog timer, integrated Brown-Out detector, several power saving systems, and a unique Window Watchdog.