USB to TTL Serial is a module to convert the USB
signals to TTL Serial signals. Serial protocol (RS232) is a standard for
interfacing between computer and embedded device. Serial protocol is a standard
that easy to use, but on new model motherboards or laptops, serial port is no
longer supported. So USB to TTL Serial converter can be a solution for
interfacing between computer and embedded device.
In this module, an IC such as FTDI is used to
convert USB signals to TTL Serial signals. Other alternative to FTDI is use
microcontroller that can be programmed as USB to TTL Serial converter such as
ATmega16u2. This IC used to handle the USB communications on one side, and TTL
serial communications on the other.
