Abstract: In this current generation, technology is at its best. Many improved technologies are more facile than they have been before. WI-FI, which stands for wireless-fidelity, is a wireless way to handle networking. This functionality allows computers, smartphones, or other contrivances to connect to the Internet or communicate with one another wirelessly within a particular area. This paper explicates information about different communication modules such as Bluetooth, RF, and Zig bee in industrial applications. In this paper, an overall comparison of these three modules are made, which are predicated upon their industrial applications and characteristics such as standards, bandwidth, battery life, data rate, maximum transmission range, etc.