Raspberry Pi
Robots connected to the net
I got a raspberry pi a while back. Installed it at home. Running Raspian Wheezy at the moment. It is running Apache, php and some other suites. It is logging to the cloud at logentries.com . I bought a small robot arm kit at the Science Gallery and assembled that; hooked it up to the Pi after buffering the GPIO outputs through some L298H bridge ICs. Then I created a php page whereby you can view the on-board camera images and control the 5 motors and 2 lights of the robot arm. This is a quick snapshot as it sits on the desk:
![Raspberry Pi robot arm remote controlled Raspberry Pi robot arm](./index_files/pi-robot-small.jpg)
I set up a cronjobbed perl script to capture the cpu load and cpu temperature, piping them to Xively (previously pachube). This lends itself to some nicely embeddable graphs:
![CPU Load from raspberry Pi](http://www.pachube.com/feeds/792754803/datastreams/cpu/history.png?w=500&h=300&c=33cc66&b=true&g=true&t=Cpu%20load&l=Load%20&s=2)
![Cpu temp](http://www.pachube.com/feeds/792754803/datastreams/cputemp/history.png?w=500&h=300&c=33cc66&b=true&g=true&t=Cpu%20Temperature&l=Temp%20Celcius&s=2)
Looking further back:
![CPU load across time](http://www.pachube.com/feeds/792754803/datastreams/cputemp/history.png?w=500&h=300&c=33cc66&b=true&g=true&t=Cpu%20Temp&l=Temp%20&s=2&r=3)
- Posted September 2014.