The RS232 Board with Extended Fittings - Raspberry Pi RoHS produced by Waveshare provides users with an extended range of functionality for their Raspberry Pi through the use of a USART serial port. It features an RJ45 network port, a USB-C connection, and a 3.3V TTL level serial port. These ports provide a reliable, high-speed connection with compatible serial devices, capable of being used in serial control applications such as industrial automation and home automation, as well as for data transmissions. The integrated TTL level serial port is also useful in controlling communications with microcontrollers and man-machine interface networks. This board meets the European Union RoHS (Restriction of Hazardous Substances) directive, ensuring it is manufactured without the use of any harmful chemicals.