The connectivity in wireless communication is established based on the receiving signal strength, which is affected by distance, interference, noise, mobility, etc. As a result, a node has a limited coverage area. Therefore, the connectivity becomes one of the significant limitations in multi-hop wireless networks. The relaying concept and transmission power control were introduced to overcome the coverage and connectivity limitation. Therefore, the relay node and transmission power control became the solutions to improve the connectivity in multi-hop wireless networks and many researchers have tried to find the optimal location of the relay node and transmission power adjustment to improve overall performance. However, in subsequent studies, only low or no connectivity areas are considered to add to the relay node or adjust the transmission power. The effect of a relay node with transmission power control for the one or two-hop wireless communication has not been investigated to the best of our knowledge. In this paper, we investigate the performance change of the relay node with transmission power control through an experimental study. The results are presented, compared, and analyzed to identify the effect of relay nodes with transmission power control.