MODIFIED BY JOHN DINGLEY FROM Twitter2LCD originally written by Fabrizio Granelli
*You can send text messages to the Arduino LCD screen from twitter if there is anyone is around at the other (Arduino) end you want to send text messages to.
*You can control the digital output pins of your arduino by sending it twitter "data" messages from same twitter page.
*Your Arduino can send twitter messages or data back from analog port sensors to the person who is using twitter on the other side of the world.
..............So full 2 way control with feedback!
* Allows twitter messages to display on an LCD display via arduino and ethernet shield. No PC required!
* ALSO ALLOWS CONTROL OF 4 DIGITAL OUTPUT PORTS VIA SIMPLE TWITTER MESSAGES
*This means I can control 4 relays for example just by sending a Twitter message.
* Arduino reads the twitter messages at 1 minute intervals and displays them on an LCD screen.
* They can be normal text messages to someone near to the Arduino OR if they have a D as first letter, they are read as "data" messages and used to control the Digital Output Pins.
* Also, the arduino can take measurements from sensors, for example a thermometer and Tweet the readings back to the remote operator who is sending the data/text tweets to the Arduino. So you have FULL REMOTE 2 WAY CONTROL VIA TWITTER
NOTE: IF YOU JUST WANT TO TURN THE OUTPUT PINS ON AND OFF REMOTELY, AND HAVE SENSOR DATA SENT TO TWITTER, YOU DON'T NECESSARILY HAVE TO HAVE THE LCD SCREEN PRESENT, the sketch will run fine, just don't bother connecting up an LCD module.