Abstract: A Wireless Sensor Network (WSN) is formed by a large number of sensor nodes where each node is equipped with a sensor to detect physical phenomena such as light, heat, pressure, etc. Sensor nodes have limited battery power source and in most cases it is difficult to replace. The researchers put different routing algorithms in order to keep power in the sensor and thus, general network. This study presents a Modified Predictive-Wakeup MAC protocol (MPW-MAC) for WSNs. This modification was done due to the PW-MAC drawbacks. Energy consumption is an important drawback which was covered by this research. A proposed method was designed by NetLogo simulator to estimate the energy consumption. PW-MAC and MPW-MAC routing protocols algorithms were used to study the WSN behaviors after implemented them simultaneously. Randomly setting choices were applied on sensors nodes: like, nodes distribution, selecting the nodes states, wakeup times of nodes and the interval wakeup. It was noted in simulated results that the outcomes of MPW-MAC protocol much better than the old protocol PW-MAC.