Bluetooth TTL module 3.3v logic level VCC,GND,TXD,RXD sampling workable Bluetooth TTL module3.3v logic levelVCC,GND,TXD,RXDAbout Sinforcon Sinforcon is a specialized manufacturer in cable assemblies with 3000square meters manufcturing sites and 300 works in Shenzhen, China. Main products are USB converter cables: usb to RS232, USB UART TTL 3.3v level and USB UART TTL 5v level. USB RS485 to RJ11, ...