V basic problem - where do I find the device id??

[Paul Travers]

Hi,

  I have a very simple problem and I feel like an idiot asking, but .. where do I find the device id for my devices in sen.se?  I can find the feed ids, and can individually poll the last items from each feed, but if I want to poll the device using  /devices/__device_id__/last_event/  then I am stuck.  

  Maybe this won't do what I want - I should ask first, if I ask for the device last event, will it give me the last event on each feed associated with the device, or merely the last event on whichever feed happened to be updated last?

tx,

Paul