Arduino uno User Manual

sleepTime = 120 * 60 * 1000;
}
try {
Thread.sleep(sleepTime);
}
catch(InterruptedException ignoreMe) {}
}
}
}
void tweetAlarm() {
ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setDebugEnabled(true)
.setOAuthConsumerKey(API_KEY)
.setOAuthConsumerSecret(API_SECRET)
.setOAuthAccessToken(ACCESS_TOKEN)
.setOAuthAccessTokenSecret(ACCESS_TOKEN_SECRET);
TwitterFactory tf = new TwitterFactory(cb.build());
Twitter twitter = tf.getInstance();
try {
Status status = twitter.updateStatus(
"Someone, please, take me to the beach!"
);
println(
"Successfully updated status to '" + status.getText() + "'."
);
}
catch (TwitterException e) {
e.printStackTrace();
}
}
Whenever new data arrives on the serial port, the Processing runtime environ-
ment calls the serialEvent method. There we try to read a line of text, and then
we check whether it contains a decimal number followed by a blank and a C
or an F character. This ensures we’ve read an actual temperature data set
and not some digital garbage.
If we got a syntactically correct temperature data set, we convert it into a float
object and check to see whether it’s greater than MAX_WORKING_TEMP . (No one
should be forced to work at temperatures that high!) If yes, we call tweetAlarm
and Tweet a message to encourage some followers to rescue us. Then we wait
for two hours until our next check. Otherwise, we wait five minutes and check
the temperature again.
tweetAlarm updates our Twitter status and is simple. In good old Java tradition,
we create a new Twitter instance using a TwitterFactory . The factory expects a
ConfigurationBuilder object that we have initialized with our Twitter application
report erratum • discuss
Tweeting Messages with Processing • 171
www.it-ebooks.info

Arduino uno Specifications

General

Form factor	Arduino
Certification	RoHS, FC, CE
Processor model	-
Processor frequency	- MHz
Microcontroller model	ATmega328
Microcontroller frequency	16 MHz
DC input voltage	7-12 V
Operating voltage	5 V
DC current per I/O pin	40 mA
Flash memory	0.032 MB
Maximum internal memory	- GB
SRAM (Static Random Access Memory)	2 KB
EEPROM (Electrically Erasable Programmable Read-Only Memory)	1 KB
Wi-Fi	No
Number of analog I/O pins	6
Number of digital I/O pins	14

Weight and Dimensions

Board dimensions	53.4 x 68.6 mm