I 'M not sure sir whether it is a open journal r not but it helps you are not? But Wireless Sensor Networks Magazine is a good website it has all type of categories which can help for new researchers. I wish u all the best
Journal of Sensor and Actuator Networks, International Journal of Distributed Sensor Networks, Sensors, IET Wireless Sensor Systems. They are all focused on WSN, but you can generally publish in journals covering networks and communications topics.
You may consider Journal of Wireless Communications and Networks http://www.academicpub.org/jwcn/ which is open access journal and wireless sensor networks are in its scope.