Musings of an aging computer nerd hitting 0x32
Some Debug Required
Testing writing the same message from the Arduino IDE gives the same results so looks like problem is in the Arduino code. Maybe the message is too long for the LCD's buffer?
The Twitter to Serial port Ruby script can be found at https://github.com/alastairhm/arduino/tree/master/SerialMessage
Doodle's Geek Monkey by Alastair Montgomery
Ruby Script to get Twitter mentions
# Find your Twitter Mentionsrequire “rubygems” require “twitter” #https://github.com/sferik/twitter for config details require “pp”
prevID = 0 while true latestMention = Twitter.mentions(:count => 1)[0] if prevID != latestMention.id msg = latestMention.user.screen_name + " " + latestMention.text #puts msg.size puts msg prevID = latestMention.id else puts “No new updates” end sleep 60 end
Sending Arduino messages over serial port
Note: 1 of this post’s 6 links are now broken — mostly dead 2008–2013 feed-syndication infrastructure (FeedBurner, Gawker, AOL’s old blog network, Pheedo, Yahoo Pipes). Left as originally published.
Idea was to use it to display tweets, just need to write the Ruby code to get the tweet and send it over the serial port now.
Here is the first version of the sketch uploaded to the Arduino.
All code can be found at https://github.com/alastairhm/arduino.git
// Auto scroll a message on the LCD and receive new messages via Serial port. // Alastair Montgomery (c) 2013 // Version 1.00 // include the library code: #include <LiquidCrystal.h> #include <string.h>// initialize the library with the numbers of the interface pins // below for SainSmart LCD Shield LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
Sainsmart LCD Shield Test
/* LiquidCrystal Library - Hello World Demonstrates the use a 16x2 LCD display. The LiquidCrystal library works with all LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface. This sketch prints "Hello World!" to the LCD and shows the time. The circuit: * LCD RS pin to digital pin 12 * LCD Enable pin to digital pin 11 * LCD D4 pin to digital pin 5 * LCD D5 pin to digital pin 4 * LCD D6 pin to digital pin 3 * LCD D7 pin to digital pin 2 * LCD R/W pin to ground * 10K resistor: * ends to +5V and ground * wiper to LCD VO pin (pin 3) Library originally added 18 Apr 2008 by David A. Mellis library modified 5 Jul 2009 by Limor Fried (http://www.ladyada.net) example added 9 Jul 2009 by Tom Igoe modified 22 Nov 2010 by Tom Igoe This example code is in the public domain.http://www.arduino.cc/en/Tutorial/LiquidCrystal */
// include the library code: #include <LiquidCrystal.h>
// initialize the library with the numbers of the interface pins //LiquidCrystal lcd(12, 11, 5, 4, 3, 2); LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
Green power
London hotel view
Creating a Ruby/ Sinatra dev environment
Note: 1 of this post’s 8 links are now broken — mostly dead 2008–2013 feed-syndication infrastructure (FeedBurner, Gawker, AOL’s old blog network, Pheedo, Yahoo Pipes). Left as originally published.
You will need the following installed;
VirtualBox VM https://www.virtualbox.org/
Vagrant http://www.vagrantup.com/
These pages are also helpful
http://net.tutsplus.com/tutorials/php/vagrant-what-why-and-how/
http://titusd.co.uk/2010/04/07/a-beginners-sinatra-tutorial/
You can see my setup files at https://github.com/alastairhm/vagrant.git
Doodle's Geek Monkey by Alastair Montgomery
frosty dog walk
