Monitoring of industrial and community environments and infrastructures are increasing targets for wireless sensor network (WSN) applications. Such applications are distributed by their nature and require essentially timing synchronization and location awareness of the sensor nodes. In this paper we present a WSN platform suitable for environment and condition monitoring applications. Time synchronization of the sensor nodes is done by utilizing multihop MAC layer synchronization signals and location awareness is gained by using time-of-flight based ranging information between sensor nodes. Results from practical test are also given.