On 23 May 2012 14:16, Steven Siebert <[email protected]> wrote: > 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). >
Not so! Most of the RP expansions under development use the GPIO/I2C header, not USB. You could use exactly the same sensors with any one of these expansions. Plus you get a more powerful processor (not microcontroller) with more memory, upgradable flash storage, the ability to run linux (including an X server), and enough hardware graphics acceleration to support 1080p video playback 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 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.
