Waspmote is an open source wireless sensor platform specially focused on the implementation of low consumption modes which allows the sensor nodes ("motes") to be completely autonomous, that is battery powered. Lifetime of Waspmote sensor nodes may go from 1 to 5 years depending on the duty cycle and the radio used.
Waspmote DigiMesh PRO embedded RF modules utilize the peer-to-peer DigiMesh protocol in 2.4 GHz for global deployments. This innovative mesh protocol offers users added network stability through self-healing, self-discovery, and dense network operation.
You will need batteries to use Waspmote as an autonomous device.
Documentation:
Waspmote Quick Tutorial
Waspmote Site
Waspmote Technical Guides
Sensor Boards Technical Guides
Networking Guides
Developers Forum
Videos
Articles
50 Applications with Waspmote
FAQ: Waspmote Vs. Arduino