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Since we are not able to replace the battery in a wireless sensor network, energy and lifetime are the most important parameters. Common sensors are not able to connect directly with the central station due to their limited ranges in asymmetrical wireless networks, therefore, we utilize super nodes. A super node has more energy, processing power and a wider range of communication. It does connectivity and transmits data to the base station, nevertheless, it is not possible for all simple nodes to connect to the super nodes directly and they transmit data through other nodes. Optimal selection and considering the energy of relay nodes are the most important sections of designing a wireless network to choose and transmit data and increase the lifetime of the network. In this paper, an energy-aware routing algorithm is presented for sensor networks.