Efficient Wireless Sensor Network Protocol Using Two Level Clustering : LAP Lambert Academic Publishing : 9786206156451 : 6206156451 : 17 Apr 2023 : A wireless sensor network consists of an enormous number of sensor nodes. Every sensor node senses environmental conditions such as heat, light, force and transmits the sensed data to a base station which is an extensive way rancid in universal. While the sensor nodes are powered by inadequate power batteries, in regulate to lengthen the lifetime of the network, minimal energy consumption is important for sensor nodes. Spread Energy Efficient Clustering scheme for heterogeneous wireless sensor networks, which the Base Station ensure that the high energy nodes becoming a gateways and cluster heads to improve network lifetime and average energy savings. The use of clustering techniques is a popular approach to improve energy efficiency and extend the lifetime of Wireless Sensor Networks (WSNs). Two-level clustering is a technique that divide