In Wireless Sensor Networks (WSNs), the main challenge is the design of an efficient routing protocol which has a major impact on the reduction of energy consumption. In this paper, the proposed routing protocol is based on Signal to Noise Ratio (SNR) to improve the performance of WSNs. In the proposed routing protocol, the residual energy is used to elect the Primary Cluster Head (P-CH), while the SNR of received signal, residual energy and the distance from a node to a sink are used to elect Secondary Cluster Head(S-CH). This proposed election mechanism helps the S-CH to use a better-quality RF channel and provides a good packet delivery ratio with minimum energy consumption. The simulation results demonstrate in static mode and Gauss-Markov Mobility Model (GMMM) as, mobile mode. The proposed routing protocol extends the network lifetime by decreasing the energy consumption and reduces overhead data. Also, it compares with C-LEACH, TL-LEACH, and A-TEEN protocols.