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How to prefill the Twitter status box (“What are you doing?”)

I’m working on a website where I need to prefill a certain message in the ‘What are you doing?’ textarea from Twitter.

Here is the solution … redirect the user to :

http://twitter.com/home?status=YOUR_URL_ENCODED_MESSAGE

for example : http://twitter.com/home?status=this%20is%20a%20test

Hope this will help someone :)

Posted in API X tryouts, Misc.


How to use the DS18S20 and DS18B20 temperature sensors with Arduino

I bought from FunGizmos few DS18S20 temperature sensors to test for my small robot project and last week they finally got into my hands but only today I had the time to try them out.

To connect the sensors to the Arduino board I choose the parasite mode which derive power directly from the data line ( no need for an external power supply anymore :) ), below are the pinouts, the electronic scheme and a photo of the circuit (though, really simple as I used a breadboard) :

pinouts ds18s20

pinouts ds18s20

Arduino connection for Dallas DS18S20

Arduino connection for Dallas DS18S20

real scheme ds18s20

After a little bit of research of Dallas’s one-wire interface and downloading the onewire library from Arduino.cc I came out with a nice function to detect all the DS18S20 and DS18B20 sensors from a one-wire bus.

Here is the detection and temperature reading code : tutorialpedia.

A sample of their output :

–Search started–
Device is a DS18S20 : 10-1D-30-F9-01-08-00-51
–Search ended–

for the detection code and

Temp = 79.25 F or 26.25 C
Temp = 79.14 F or 26.19 C
Temp = 79.14 F or 26.19 C
Temp = 79.25 F or 26.25 C

for the temperature retrieving code.

Other helpful links :
* onewire.h library
* Dallas DS18S20 official document

Posted in Arduino.


Free Arduino language file for GeSHi

As you may know, from now on all the code from this blog will be on tutorialpedia.

I started writing some Arduino tutorials so I needed a syntax highlighter for the code I wrote, the best choice was GeSHI but it didn’t had a language file for Arduino code so I wrote it.

An example of it at work : Blinking a LED with Arduino.

To download it click here : GeSHi Arduino language file.

Hope this will help you.

Posted in Arduino.



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