PL2303 TTL Serial Module 3LED Indicator Type C USB To TTL Board 3.3V/5V Output
TXD: connect to MCU.RX (signal flow direction: MCU.RX<>PL2303>>PC.RX). 1 x PL2303 USB UART Board (Type C ). The module is TypeC to TTL level, do not connect directly to RS232 level to avoid burning the module.