I had put together a breadboard version of an Arduino Uno, and the first problem I had was installing the drivers for my CP2102 USB to UART device. Solution to that problem: I eventually found, downloaded, and installed the driver from here: http://www.silabs.com/products/mcu/Pages/USBtoUARTBridgeV…

How I solved my CP2102 USB to UART problems for a breadboard Arduino

Coding_Badly February 1, 2013, 1:21am 2

agent_cooper:
Anyone know why this is necessary?

Forgot to connected the grounds?