These days we hear a lot of noise about IoT, the Internet of Things. But what is this IoT, and how does it work? You can find answers to all these questions in this article.

What is IoT?

The internet of things establishes communication between interrelated computing mechanical devices that can transfer data. Simply, IoT is the concept of connecting any device (as long as it has an ON/OFF switch) with the internet or to other connected devices.

Let us consider an example. Imagine you leave your office with your lamps on. It will unnecessarily consume power until you return. In this case, if

the lights are an IoT device, then a simple command from the user can trigger the software and control the actions of the lamp without much effort. You can switch off, schedule the period for dimming the lamps, etc., without much effort.

How does it work?

The working of IoT is different for different IoT echo systems/ architectures. However, the key concepts of working are similar. The entire working process of IoT starts with the device themselves (eg. smartphones, digital watches, electronic appliances), which securely communicate with the IoT platform.

The platforms collect and analyse the data from all devices and platforms and transfer the data with applications to devices.

Types of IoT devices

The list of types of IoT Devices are continuously growing day by day.

These are some common types of IoT devices:

  1. Sensors: These sensors are intelligent and can collect information for us to take the decision. Optical sensors for automatic street lights, temperature sensors for smart thermostats, and the internal sensors embedded in industrial machinery are examples of sensors
  • Security Devices: IoT motion sensors are a part of advanced IoT security systems. Smart home security cameras and audio recording devices are already common in our residential, commercial and industrial spaces.
  • Smart wearable Devices: Wearables devices are one of the most recognizable iOT devices. Ear buds and smart watches are the most common among these. However, in this category there are more devices that are coming soon – smart glasses, augmented reality devices etc.
  • Intelligent Appliances: Intelligent refrigerators, connected televisions gather its environmental information via IoT devices and makes appropriate adjustments accordingly.
  • Actuators: Most of the IoT devices collect environmental data whereas Actuators receives data from other iOT devices, and equipped with mechanics needed to makes physical changes based on the received data.

Features of IoT Technology

Some of the main features are:

  1. Intelligence: Intelligence is an essential part of a smart product. IoT

makes things smarter and enhances life through the use of data

  • Connectivity: This will be responsible for network accessibility and compatibility of the devices. It will establish a proper connection between all the things of IoT and IoT platforms (It can be a server or cloud). After establishing the connection, it needs a high-speed messaging between the device and the IoT platform for enabling reliable, secure, and bidirectional communication.
  • Sensing: Sensors will detect and measure the environmental change and update the status. This information from sensors used for intelligent decision.
  • Expressing: It will enable interaction with humans and other things.
  • Energy: Without this, It is not possible to create our devices. Energy harvesting and proper infrastructure to charge will be important features for our IoT devices
  • Active Engagement: IoT makes connected technology, products, or services to active engagement between each other.

Benefits of IoT Technology

  1. Business Opportunity: Businesses with IoT can easily develop new revenue tracks.
  • Enhanced and Efficient resource utilization: It will improve tracking of assets and achieve efficient products as well as monitor natural resources.
  • Enhance device communication.
  • Automation and control: This will minimize human effort. Because it strives towards achieving automation with minimal or no human intervention since machines can lead to a faster and timely output.
  • Save time and efficiency: As it reduces human effort, it will save time and will be efficient.
  • Enhance Data collection.

Disadvantages of IoT Technology

  1. Security: IoT systems can communicate over networks. So the system offers little control without any security measures. But it can lead to various kinds of network attacks.
  • Privacy: Even without the active participation of the user, the IoT system provides substantial personal data in maximum detail.
  • Complexity: The designing, developing, and maintaining and enabling the large technology IoT system is quite complicated.

Common types of connection methods utilized in IoT

1. Ethernet

It is suitable for systems with many nodes on the same network. This type of connection found in industrial and building automation. Ethernet is one of the fastest and most reliable ways to connect things with internet

2. Wi-Fi

Most mainstream devices support this method and do not have the hard-wiring constraints of Ethernet. The main attractive points of WiFi are, it is wireless and fast. However, security vulnerabilities and power consumption are the main challenges of this method.

3. Low Power Wide Area Network (LPWAN)

LPWAN is commonly used for wide-area applications like environmental monitoring, monitoring inaccessible areas, agriculture etc. since these

networks can cover large area with very little power.

4. Cellular

Even though cellular coverage is all over the world, this method is expensive. We must use a provider, and we need governmental regulatory approval for setting up our networks. The cost of the embedded components and provider subscriptions restricts cellular networks’ extensive reach.

5. Satellite

Satellite connectivity is for remote regions without cellular coverage.

6. Bluetooth

Bluetooth is one of the most commonly used connectivity methods because it is widely supported, low in power and easy to pair, Unlike Wi-Fi, Bluetooth does not directly connect to the Internet. We need to set up a gateway to connect to the internet.

Commonly used networks, such as WiFi and Bluetooth, are the easiest way to evaluate and explore IoT designs. These networks do not require you to build your own gateway or pay for a provider. Several Wi-Fi and Bluetooth prototyping modules are available to consumers with open source code and tutorials. Let us check out whether Wi-Fi or Bluetooth is more suitable for IoT development.

Bluetooth vs. Wi-Fi for IoT

Let us check some important factors to make a choice between BLE and


1. Security

Both Bluetooth and Wi-Fi offer good levels of user security. Before there were issues with Bluetooth where a third-party device can listen the data transfer between two devices. AES-CCF Cryptography(encrypting the data)

fixed this issue. Wi-Fi uses 256-bit encryption whereas bluetooth offers 128-bit encryption. Both are the usual level of security that user needed. However, if you want a higher level of security then you can go for Wi-Fi.

2. Speed

Bluetooth is suitable for transferring small chunks of data (such as values from IoT sensors) at 1Mbps.  Bluetooth is not suited for sending data in real-time to a server. For that, we need a special gateway for sending data.

Wi-Fi is the ideal type for sending large files and data (such as videos). IT can transmit data up to 1.3Gbps speed. The speed of Wi-Fi may vary based on different factors (such as subscribed providers). However, Bluetooth is very much slower than Wi-Fi Direct.

3. Privacy

Bluetooth offers more privacy than Wi-Fi.

4. Location detection accuracy

Both Wi-Fi and Bluetooth can provide accurate location information, although Bluetooth may be somewhat more reliable in certain cases. For eg

micro-locating, Bluetooth is the best option, because Wi-Fi signals are really incompetent for penetrating through solid objects, including walls.

5. Proximity detection

The proximity detection provided by Bluetooth is much more accurate than Wi-Fi. By measuring the access points in a device, Wi-Fi correctly points to the exact location (SSID and MAC address used).. However, Bluetooth is all about proximity, not about the correct location.

6. Transmission Range

Bluetooth is smaller in range than Wi-Fi.  The long range Bluetooth modules provide a range of up to around 1,500 feet. Bluetooth uses mesh networking, So we can transmit over a large range with less power. Even though the range of Bluetooth will depend on the obstacles and the density of the walls in between two devices. Bluetooth will not be the best choice for all IoT devices /scenario.

If the device needs to exchange a substantial amount of data, Bluetooth will not be able to accomplish this. For transmitting large images, Wi-Fi is the answer. Wi-Fi range also varies depending on some factors such as frequency, transmission power, antenna type, and environment, etc. Wi-Fi

routers located outdoors have a much larger range.

7. Power usage

Bluetooth devices have lower power consumption than Wi-Fi devices.

8. Deployment costs

Bluetooth is less costly, self-sufficient, and extra configuration is not needed. We need to configure the Wi-Fi routers and should connect to a power source. The expense of Wi-Fi depends on the router used and the manufacturer.

There is no clear winner when it comes to Bluetooth v/s Wi-Fi. Both can have their own pros and cons. In general, Bluetooth is better for mobile devices that have limited power requirements, and is suitable for transferring small chunks of data . However, Wi-Fi is better for larger data transfer that needs a direct connection to the Internet.

About Logidots

Are you planning to develop an IoT app? At Logidots, we have developed multiple IoT solutions ranging from enterprise smart device solutions to robotic toy apps that can be controlled through mobile apps. If you would like to discuss your IoT product idea, get in touch with an app expert from Logidots.

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