{"id":130,"date":"2013-08-15T12:23:28","date_gmt":"2013-08-15T12:23:28","guid":{"rendered":"http:\/\/blog.soton.ac.uk\/pi\/?page_id=130"},"modified":"2013-08-23T16:34:31","modified_gmt":"2013-08-23T16:34:31","slug":"clockatoo","status":"publish","type":"page","link":"https:\/\/blog.soton.ac.uk\/pi\/clockatoo\/","title":{"rendered":"Clockatoo"},"content":{"rendered":"

1) Getting started and setting the clock<\/b><\/p>\n

Geekroo Raspberry Pi LED Clock Expansion Board – Clockatoo<\/b> is an I2C device for the Raspberry Pi. It comes with some Python code to make the “Clockatoo” work. Install the 4-digit LED taking care not to put the LED up-side-down (as per Figures below). Then stack the Clockatoo on the Raspberry Pi using\u00a0 the 26-pin GPIO header.<\/p>\n

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Now you need to configure the I2C in case this is not already done. After log in, edit this file\u00a0: \/etc\/modules<\/code><\/strong> by running sudo nano \/etc\/modules <\/code><\/strong>and add these two lines to the end of the file if they’re not there:<\/p>\n

i2c-bcm2708
\ni2c-dev <\/code> <\/strong><\/p>\n

Then your \/etc\/modules<\/code> should be looking like this:<\/p>\n

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Now it’s time to see if the Clockatoo has been properly connected to the Raspberry Pi or not. Run the following command, to install the i2c-tools utility:<\/p>\n

sudo apt-get install python-smbus
\nsudo apt-get install i2c-tools <\/code><\/p>\n

After the installation, type the follow command to see all the connected devices.
\nFor the Raspberry Pi Revision 1:<\/p>\n

sudo i2cdetect -y 0 <\/code><\/p>\n

For the Raspberry Pi Revision 2:<\/p>\n

sudo i2cdetect -y 1 <\/code><\/p>\n

If your Clockatoo has been properly stacked on the top of the Raspberry Pi, you should be able to see these two numbers: 68 and 70<\/p>\n

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Now to download the software for Clockatoo type the following commands:
\n sudo apt-get install git
\ngit clone git:\/\/github.com\/geekroo\/Geekroo-Product-Clockatoo.git<\/a> <\/code><\/p>\n

After downloading, if you use ls<\/code> command, you should be able to see the “Geekroo-Product-Clockatoo” folder. Like this:<\/p>\n

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Go into that folder, and run the “Clockatoo” script:<\/p>\n

cd Geekroo-Product-Clockatoo\/
\ncd R2.0\/ <\/code>(If you’re using the Raspberry Pi Revision 2)<\/p>\n

Or<\/p>\n

cd Geekroo-Product-Clockatoo\/
\ncd R1.0\/ <\/code>(If you’re using the Raspberry Pi Revision 1)<\/p>\n

Now run the script:<\/p>\n

sudo python clockatoo.py <\/code><\/p>\n

Now the Clockatoo should be working for you by displaying the time on the LCD screen. The Raspberry Pi keeps updating the time automatically from the global ntp (nework time protocol) servers. Clockatoo gets time from the Raspberry Pi. So you can always see the current time.<\/p>\n

http:\/\/geekroo.com\/wiki\/Manual:RPi_Expansion_Board_-_Clockatoo<\/p>\n

 <\/p>\n

2) Using the incorporated buzzer as an alarm<\/strong><\/p>\n

The buzzer can be controlled through the WiringPi library. WiringPi2 for Python is an excellent GPIO handling system written by Gordon Henderson and packaged for Python by Phil Howard. Installing WiringPi2 for Python is very simple, but there are a couple of required packages, so we\u2019ll install those first. Before we install anything, though, let\u2019s update the package first<\/p>\n

sudo apt-get update<\/code>
\nThis is what should happen\u2026<\/p>\n

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Now we need the following.
\nsudo apt-get install python-dev python-pip<\/code><\/p>\n

Now we\u2019re ready to install WiringPi2 for Python itself
\nsudo pip install wiringpi2<\/code><\/p>\n

You will see lots of messages. pip, the python package installer that you just installed, is compiling WiringPi2 and installing it all for you. After lots of messages starting with \u201cgcc \u2013 pthread\u201d, you should see this\u2026<\/p>\n

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Now you should be good to go. Let\u2019s check that it works with a live Python environment. Type the following commands in the terminal, with end-line between each of them.<\/p>\n

sudo python<\/code>
\nimport wiringpi2
\nwiringpi2.piBoardRev()<\/code><\/p>\n

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We just imported wiringpi2 and used one of its new functions piBoardRev() which is the built-in Raspberry Pi revision checker.\u00a0 If that all works as it should, type ctrl+d<\/code><\/strong> to exit python<\/p>\n

You are installed and ready for action with WiringPi2\u2032s GPIO features.<\/p>\n

How to install WiringPi2 for Python on the Raspberry Pi<\/a><\/p><\/blockquote>\n