The smallest and easiest to use serial conversion circuit on the market! This board has one purpose in life: to convert RS232 to TTL and vice versa (TX and RX). This will allow a microcontroller to communicate with a computer.
The module uses a 4-way pin connector (GND/RXD/TXD/VCC) to interface with the microcontroller and another DB9 connector to connect to the RS232 device.
