By hinkmond on Jan 30, 2013
Just follow the hint that Wolf Paulus gives in his blog post (photo is from Wolf Paulus also)
For Java Embedded development, the easiest way I found (which I told Gary C. about recently) is to use an FTDI Breakout Board with a USB port.
Here are the steps:
1. Buy these parts: OSEPP FTDI Breakout Board $15.99 http://www.frys.com/product/6997547?site=sr:SEARCH:MAIN_RSLT_PG Set of Jumper Wires $12.99 http://www.frys.com/product/7367744?site=sr:SEARCH:MAIN_RSLT_PG SIIG 2 Amp/2 Port USB Adaptor http://www.frys.com/product/7182042?site=sr:SEARCH:MAIN_RSLT_PG Micro USB cable http://www.frys.com/product/6151789?site=sr:SEARCH:MAIN_RSLT_PG 2. Make sure the jumper on the FTDI Breakout is configured for 3.3 volts. 3. Use the jumper wires to make 2 connections from the FTDI Breakout Board to the RPi: From FTDI 3.3V TXD to (GPIO Pin 8) From FTDI 3.3V RXD to (GPIO Pin 10) See this Web reference: http://wolfpaulus.com/journal/embedded/raspberry_serial 4.Connect one end of a USB cable into the FTDI and the other end into the Windows/Mac/Linux PC. 5. Then use PuTTy or minicom on a Windows/Mac/Linux PC with a new connection to the right serial port (Ex. /dev/ttyUSB0 on a Linux PC or COM5/COM6/COM?? on Windows PC) using these serial connection settings 115200 bps 8-N-1. 6. Hit return a couple times to get the console prompt. Make sure the RPi is properly powered with it's AC adapter (not connected to a computer for power since only the AC adapter that comes with the RPi has enough current to drive it for this use).
Voilà! You have a USB connection to the RPi console to do your Java Embedded programming. Nifty, huh?