Bluetooth is a technology used for exchanging data wirelessly over short distances and preffered over various IoT network protocols. It uses short-wavelength UHF radio waves of frequency ranging from 2.4 to 2.485 GHz in the ISM band. The Bluetooth technology has 3 different versions based on its applications:
Bluetooth: The Bluetooth that is used in devices for communication has many applications in IOT/M2M devices nowadays. It is a technology using which two devices can communicate and share data wirelessly. It operates at 2.4GHz ISM band and the data is split in packets before sending and then is shared using any one of the designated 79 channels operating at 1 MHz of bandwidth.
BLE (Bluetooth 4.0, Bluetooth Low Energy): The BLE has a single main difference from Bluetooth that it consumes low power. With that, it makes the product of low cost & more long-lasting than Bluetooth.
iBeacon: It is a simplified communication technique used by Apple and is completely based on Bluetooth technology. The Bluetooth 4.0 transmits an ID called UUID for each user and makes it each to communicate between iPhone users.
After launching the BLE protocol, there have been many new applications developed using Bluetooth in the field of IOT. They fall under the category of low-cost consumer products and Smart-Building applications. Like Wi-Fi, Bluetooth also has a module Bluetooth HC-05 that can be interfaced with development boards like Arduino or Raspberry Pi to build DIY projects. When it comes to Real-time applications, Marvell’s Avastar 88W8977 comes with Bluetooth v4.2 and has features like high speed, mesh networking for IOT. Another product, M5600 is a wireless pressure transducer with a Bluetooth v4.0 embedded in it.