Most of Raspberry like ARM devices have system image written to sdcard. Whenever we need to update base image we need to take out memory stick, write image and put it back. Now imagine that you have 8 boards and you want to update all of them (e.g your current system is crashing). So, you won't do it manually, will you?
Have you ever dreamed of building your own cluster? Running your own service on your own machines? Now with ARM boards it is possible! You don't need much space or excessive amount of money. In this article you may see how I did it and how to control power of each ARM device separately.
Some time ago I'd an opportunity to play around with BBB. The program presented in this article is collecting data from DS18B20 sensors and stores them in sqlite database. Data are accessible via http (jQuery mobile). I was in hurry while writing the code, so article's content might seem a bit messy. Additionally you may set an alarm, whenever temperature exceeds defined boundaries you'll be notified by email.
If you're are an embedded system beginner and you don't know where to start, this is article for you! After reading, you'll know how to build simple system with yocto/buildroot and how to boot it with qemu.