  To overcome the problem of unavailability of grid power in rural India, we
explore the possibility of powering WSN gateways using a bicycle dynamo. The
"Data mule" bicycle generates its own power to ensure a self sustainable data
transfer for information dissemination to small and marginal farmers. Our
multi-interface WSN gateway is equipped with Bluetooth, Wi-Fi and GPRS
technologies. To achieve our goal, we exploit the DTN stack in the energy sense
and introduce necessary modifications to its configuration.
