[Arm-netbook] Hacking the Mele A1000 - ultra beginner guide

[Vladimir Pantelic]

Oliver Kiddle wrote:

>>  So let's see if this will fly, I am blocked at the very
>>  beginning: an
>>  UART to serial, or as I understand, UART to serial to USB
>>  cable is
>>  required, is this what I should purchase?
>
> I'm lucky enough to have a real serial port on my PC but the wiki page seems to indicate that the UART port runs at 3.3 volts. So do we need some sort of level shifter such as the following?
>    http://www.ebay.de/itm/RS232-Serial-Port-To-TTL-Converter-MAX3223-Adapter-Module-for-PIC-ATMEL-MCU-3-3V-/230682034527

also: http://www.sparkfun.com/products/10009

> The photo shows four pins and the label GRxTx3.3v so which of the four is not used or how else is it connected?

usually you dont need to connect the VCC (3.3V) pin, just GND, RX and TX