Bringing it All Together: Embedded Services Platform

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Bringing it All Together Embedded Services
Platform

• We recognized that every one of our embedded
  projects exported a set of useful functions
  (accessors and mutators)
• What if we made it easy to harvest the
  functionalities of any number of motes at once?
• What if we wanted to easily access data on a mote
  to perform complex post-processing on the numbers
  using a real PC?
• The answer a service model that provides a
  programmatic, master-slave relation between PC
  and motes

• All communication is encapsulated in an XML
  schema called SML (Service Model Language)
• SML provides for three response models
• IDENTIFY Provides function manifest in response
• GET Functions that retrieve data (returns read
  response)
• SET Functions that actuate device components and
  mutate mote data or behavior (returns write
  response)

ASSOCIATE (UDP) Mote asks to register with
master

• Python-based UDP/TCP/HTTP aware server that
  allows any mote to register with it with a UDP
  protocol
• Server asks for and mote sends a manifest
  containing all the services it provides (GET
  functions and SET functions)
• Server collects all these manifests and allows
  user to write a plug-in that controls all the
  motes at once using the power of Python

MASTER (UDP) Master confirms registration
REST call identify (SML/TCP) Master downloads
function manifest
Now the server can control the mote over
REST/HTTP using all of its exposed functions!
Server (Running our Python code)
Embedded Mote (e.g. coffee pot, toaster, kitchen
sink, etc.
ltsmlgt ltidrspgt ltsetgt ltcmd
name"hotplate" args"1" arg1"bool" /gt
ltcmd name"boiler" args"1" arg1"bool" /gt
lt/setgt ltgetgt ltcmd name"hotplatepower"
args"0" returns"bool" /gt ltcmd
name"boilerpower" args"0" returns"bool" /gt
ltcmd name"coffeetemperature" args"0"
returns"int" /gt ltcmd name"coffeevolume"
args"0" returns"int" /gt ltcmd
name"tankvolume" args"0" returns"int" /gt
lt/getgt ltshortnamegtcoffeepotlt/shortnamegt
ltnamegtCoffee on Railslt/namegt
ltapigt1lt/apigtlt/idrspgt lt/smlgt
ltsmlgt ltrdrspgt ltstatus typeint
sourcetemperaturegt30lt/statusgtlt/rdrspgt lt/smlgt
ltsmlgt ltwtrspgt ltstatus typebool
sourcehotplategttruelt/statusgtlt/wtrspgt lt/smlgt

• One day, most household electronics could be
  networked together using Bluetooth, LoWPAN, etc.!
• Bob drives home from work and the proximity of
  his car to the garage triggers the opening of the
  door
• The opening of the garage is noticed by the
  coffee pot, which starts brewing coffee, and the
  television, which switches to Bobs favorite
  channel
• The lighting of his living room is regulated by a
  sensor mote that sets it depending on the ambient
  outside light.
• His computer notices hes home and preloads all
  the web pages he usually visits.
• If all these devices were internetworked like
  what you see today, all this could in theory be
  orchestrated by a single Python plugin to our
  service model in something like 300 lines of code.

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