5Pcs RS232 SP3232 Serial Port To TTL RS232 to TTL Serial Module With Brush Line 3V To 5.5V

Instructions for Use: (here to access MCU illustrate how to connect each PIN) VCC: pick 3V-5.5V GND: Connect to GND RxOUT: pick MCU.RX (signal flow: MCU.RX > SP3232 >> PC.RX) CTS: pick MCU.CTS (signal flow: MCU.CTS > SP3232 >> PC.CTS) Feature: The interface module has a degree of unity, they are also considered in the design of the main control board with the Open series compatibility, and thus has superior portability. Package Included: 5 x RS232 Serial Module