Indeed, you are correct. I was responding to the use cases Casper put forth. Not only would the Arduino be a cheaper platform, but the sensors themselves would be as well (RP doesn't have analog/digital IO pins exposed, as I see, so you would have to purchase much more expensive sensors with USB).
RP might be good for the processing/web server component, but I've been using Atom boards to create JVM clusters to process and provide services like this. At $80-100 for the mainboard and CPU and another $20-40, depending how much I need, it's a great price point for an at-home cluster. My Atom "blades" (they sit in a wooden box/"cabinet" I created) normally only have 2 running (do general web serving, and manage the cluster), those are the only blades with discs (SSD). When I need more capacity, the cluster manager starts more disc-less blades (ethernet wake up on lan) and those blades download their TinyCoreLinux OS from the cluster, running in memory. Depending on what they need to do, they may get data from the existing node members (currently this only happens in the form of Hazelcast re-partition or a straight file download). Everything is in-memory on the processing blades, so I need to be careful. The OS+JVM+other services take about 50MB last time I check. Sorry for the rant...I have too much fun with this. S On Wed, May 23, 2012 at 8:50 AM, Jan Goyvaerts I❤© <[email protected]>wrote: > To my knowledge the RP is not a kit, but rather a computer. > > > On Wed, May 23, 2012 at 2:44 PM, Steven Siebert <[email protected]> wrote: > >> Arduino [1] would be cheaper for this stuff =) >> >> [1] http://www.arduino.cc/ >> >> On Wed, May 23, 2012 at 8:00 AM, Casper Bang <[email protected]>wrote: >> >>> I'm just trying to think to an excuse^H^H^H^H^H^H a smart idea about >>>> what >>>> to do with that stuff so I buy one :-) >>>> >>> >>> Phase 1) Make your own process historian and hook up sensors for >>> electricy consumption, water consumption, heat consumption, temperatures, >>> mailbox arrivals etc. Phase 2) Have a small webserver generate charts and >>> prognoses for your devices, perhaps even Android gadgets and wallpapers. >>> Phase 3) Add some intelligence feedback to control windows, radiator, >>> exhaust fan etc. :) >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Java Posse" group. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msg/javaposse/-/YIOd7P_GV2UJ. >>> >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/javaposse?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Java Posse" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/javaposse?hl=en. >> > > -- > You received this message because you are subscribed to the Google Groups > "Java Posse" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/javaposse?hl=en. > -- You received this message because you are subscribed to the Google Groups "Java Posse" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/javaposse?hl=en.
