What is MQTT and how does it work?

Vaibhav Kothia May 26, 2023 0 Comments

MQTT (Message Queuing Telemetry Transport) is a messaging protocol that is specifically designed for lightweight machine-to-machine (M2M) communication over networks. It is an extremely simple and lightweight publish/subscribe messaging protocol designed for constrained devices and low-bandwidth, high-latency or unreliable networks.

MQTT works by having a central broker that all clients can connect to and publish or subscribe to topics. When a client publishes a message, it is sent to the broker, which then forwards it to all the clients that have subscribed to that topic.

For example, a network of connected sensors in a factory might use MQTT to send data back to a central server. Each sensor would publish data to a topic such as “sensor/temperature”, and the server would subscribe to this topic. The server would then receive all the data from the sensors in real time.

What is LoRaWAN and how does it work?

Vaibhav Kothia May 26, 2023 0 Comments

LoRaWAN (Long Range Wide Area Network) is a low power wireless network protocol designed for long range, low power communication. It uses the unlicensed spectrum in the Industrial, Scientific and Medical (ISM) bands and operates in the sub-gigahertz range. It is designed to be used in applications such as smart metering, asset tracking, and remote monitoring.

LoRaWAN works by using a combination of spread spectrum and chirp spread spectrum (CSS) modulation techniques to transmit data over long distances. The data is sent in the form of packets, which are then received by the gateway. The gateway then forwards the data to the network server, which then sends it to the application server.

For example, a smart meter could use LoRaWAN to transmit its readings to the network server. The smart meter would use its LoRaWAN transceiver to send a packet containing the meter’s readings to the gateway. The gateway would then forward the packet to the network server, which would then send it to the application server. The application server would then process the data and send it to the utility company.

What is the purpose of the port number?

Vaibhav Kothia May 26, 2023 0 Comments

The port number is a numerical identifier used to differentiate different applications or services that are running on the same computer. It is like a street address for a computer, allowing it to receive data from other computers. For example, web servers usually use port 80 to receive data from web browsers. Similarly, email servers use port 25 for incoming emails.

What is the purpose of the IP address?

Vaibhav Kothia May 26, 2023 0 Comments

The IP address is a numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication. It serves two primary functions: host or network interface identification and location addressing.

Example:

An IP address is a series of numbers and decimals that are assigned to each device connected to a network. For example, a computer connected to a network may have an IP address of 192.168.1.1. This address is used to identify the device and its location on the network.

What is TCP/IP?

Vaibhav Kothia May 26, 2023 0 Comments

TCP/IP stands for Transmission Control Protocol/Internet Protocol. It is a set of communication protocols used for connecting computers on the Internet. TCP/IP is the language computers use to communicate with each other over the Internet.

Example: When you type in a website address in your browser, your computer sends a message to the web server using TCP/IP. The web server then responds with the requested web page, also using TCP/IP.

What are the benefits of using MQTT for IoT applications?

Vaibhav Kothia May 17, 2023 0 Comments

1. Low Bandwidth Usage: MQTT is a lightweight protocol that uses very little bandwidth, making it ideal for IoT applications that need to send data over a network with limited bandwidth.

2. Low Power Consumption: MQTT is designed to be used on devices that have limited processing power and battery life. It requires minimal resources to send and receive data, making it an ideal protocol for battery-powered IoT devices.

3. Security: MQTT provides authentication and encryption for data sent over the network, making it a secure protocol for IoT applications.

4. Ease of Use: MQTT is a simple protocol with a straightforward syntax, making it easy to use for developers.

Example:

A smart home system that uses MQTT can send data from sensors to a central server. The sensors can measure temperature, humidity, and other environmental factors. The data is sent over the network using MQTT, which is secure and uses very little bandwidth. The server can then process the data and send commands to other devices in the home, such as lights, thermostats, and security systems.

How does MQTT work?

Vaibhav Kothia May 17, 2023 0 Comments

MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol designed for low-bandwidth, high-latency, unreliable networks. It is designed for machine-to-machine (M2M) communication and is often used in the Internet of Things (IoT) applications.

MQTT works by using a publish/subscribe model. The client (publisher) publishes messages to a broker (server) and the broker distributes the messages to all clients (subscribers) that are subscribed to the topic.

For example, let’s say you have a temperature sensor connected to the MQTT broker. The sensor publishes the temperature readings to a topic called “temperature”. Any other device that is subscribed to the “temperature” topic will receive the temperature readings.