Wireless sensor networks (WSNs) have today become an integral part of our lives as they may be utilized in a wide range of application areas, including environmental monitoring, healthcare, industrial applications, football stadiums, military, civilian, and homeland security. However, the reliability of WSN communications faces significant problems in hostile and complicated situations. The longevity and energy consumption of a WSN have consequently emerged as challenging research areas. To conserve energy and lengthen the lifespan of the network, an energy efficient routing protocol, EERP, for wireless sensor network systems must be developed. A node's limited power supply presents a problem, as the node's battery cannot be changed. The lifespan of each sensor node has a significant impact on the lifetime of the WSN. The main issue in the field of WSN is an energy efficient routing mechanism. Hierarchical routing is one of the strategies being developed by researchers to improve the lifetime of WSNs. The suggested approach in this work can increase the lifespan of a WSN and decrease the energy consumption of sensor nodes. In this paper, we propose an energy efficient routing protocol (EERP) that can save energy in the sensor while the node is in sleep mode for wireless sensor networks (WSN). The method is sleep mode and active mode (flip, flop). The simulation results show how the system's energy efficient routing protocol (EERP) improved battery energy performance in the network. The proposed routing method's performance was significantly enhanced through a comparison experiment between it and the existing techniques. As a result, it was established that the technique suggested in the paper performed better than the existing method.