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I want basic knowledge of iot and how to utilise it.
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Here's a brief intro of IoT:
IoT refers to the connection of physical devices to the internet, enabling them to collect and exchange data. These devices can include everyday objects like appliances, vehicles, and industrial machines.
Components of IoT:
Devices or Things: Physical objects embedded with sensors and actuators.
Connectivity: Networks that allow devices to communicate, often through Wi-Fi, Bluetooth, or cellular networks.
Data Processing: Cloud or edge computing processes the data collected from devices.
User Interface: Interfaces for users to interact with IoT devices and access data.
Key Concepts:
Sensors: Devices that gather data (e.g., temperature, humidity).
Actuators: Devices that perform actions based on data received (e.g., turning on a fan).
Connectivity Protocols: Standards for devices to communicate (e.g., MQTT, CoAP).
Data Security: Ensuring the confidentiality and integrity of IoT data.
IoT Use Cases:
Smart Home: Connected thermostats, lights, and security systems.
Industrial IoT (IIoT): Monitoring and optimizing industrial processes.
Healthcare: Wearable devices for health monitoring.
Smart Cities: IoT applications for urban infrastructure and services.
How to Utilize IoT:
Identify Use Case:
Determine the specific problem or process you want to improve using IoT.
Select IoT Devices:
Choose appropriate sensors, actuators, and devices based on your use case.
Connectivity:
Establish a reliable and secure network for device communication.
Data Processing:
Decide whether data processing will be done on the cloud or at the edge.
Develop Applications:
Create software applications to collect, process, and analyze data.
User Interface:
Develop interfaces for users to interact with and monitor IoT devices.
Implement Security Measures:
Ensure data privacy and protection through encryption and secure protocols.
Testing and Optimization:
Test the IoT system in real-world conditions and optimize for efficiency.
Scale and Maintain:
Consider scalability as the number of devices grows, and implement maintenance plans.
Compliance and Standards:
Adhere to industry standards and regulations to ensure compliance.
Remember that IoT is a vast and evolving field. Staying informed about new technologies and security practices is crucial for successful IoT implementations.
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While we are more than willing to help those that are stuck, that doesn't mean that we are here to do it all for you! We can't do all the work, you are either getting paid for this, or it's part of your grades and it wouldn't be at all fair for us to do it all for you.
So we need you to do the work, and we will help you when you get stuck. That doesn't mean we will give you a step by step solution you can hand in!
Start by explaining where you are at the moment, and what the next step in the process is. Then tell us what you have tried to get that next step working, and what happened when you did.
If you are having problems getting started at all, then this may help: How to Write Code to Solve a Problem, A Beginner's Guide[^]
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Based on his profile, I'm betting he has an application he wants to sell you...
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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I figured as much, but ...
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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So you want someone to answer your obvious homework question for you?
No. This is where YOU start doing your own research into what Web 3.0 is, the technologies involved, and how they apply to apps like DoorDash and GrubHub.
Open up a browser to Google and get to work. Asking other people to do your work for you isn't going to get you very far.
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nithin sethu wrote: transform the food delivery app
It won't. That is the answer.
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What is the difference between JDK, JRE, and JVM?
modified 15-Nov-23 11:16am.
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The second and third letter.
(If you want serious answers, then you need to learn how to ask better questions, and do your own basic research first.)
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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JDK = Java Development Kit, basically it's the SDK (Software Development Kit) of the Java world. Long story short, it'll contain the libraries and tools needed to help build a Java application. It also ships with the JRE, but contains so much more. You'll need to install this on your development machine.
JRE = Java Runtime Environment, this will need to be installed to run a Java application on a non-development machine. It'll contain the pre-built binaries that even the JDK will use and there will be some overlap as far as while goes into it when compared to the JDK. But, you'll need to install this on your end users machines. They won't need all the tools a developer does and this installed only what's needed to run an application.
JVM = Java Virtual Machine, Java compiles down to a bytecode and not native code. The VM is what reads the bytecode and runs it on the computer. Anything written in Java must be ran through this and both the JDK and JRE will install it as an application or library cannot run without it.
Jeremy Falcon
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<pre>JDK, JRE, and JVM are all key components of the Java programming language, each serving a specific role in the Java development and execution process:
JDK (Java Development Kit):
The JDK is a software development kit that includes tools and resources necessary for developing Java applications.
It contains the Java compiler (javac), debugger, libraries, documentation, and other utilities needed for Java development.
Developers use the JDK to write, compile, and debug Java code.
JRE (Java Runtime Environment):
The JRE is a part of the JDK but can also be installed separately.
It provides the runtime environment for Java applications to run. It includes the Java Virtual Machine (JVM), class libraries, and other files that support the execution of Java applications.
Users who only want to run Java applications, without the need for development, typically need the JRE.
JVM (Java Virtual Machine):
The JVM is an abstract machine that provides a runtime environment for Java bytecode to be executed.
When a Java program is compiled, it is translated into bytecode, which is then interpreted and executed by the JVM.
The JVM is platform-dependent, meaning there are different implementations for different operating systems. It abstracts the hardware and operating system details, allowing Java programs to be executed in a "write once, run anywhere" manner.</pre>
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I have a set of IoT devices that connects to Azure IoT hub regularly to send in telemetry.
Sometimes I need to send messages to the device. I do this my using the:
devices/{device_id}/messages/devicebound/# queue.
The device are using a built-in MQTT library.
If I send something to the device while it is offline, it was my impression that the
message should be retained in the devicebound queue until the device came online again, and read the queue.
If I send the messeage when the device is online, everything works ok, and the device gets the message.
If sent while offline, the queue is empty when the device come online again, and the message is lost.
Am I right in assuming that the devicebound queue should retain the message until the device comes online and read it?
TIA...
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You can't assume anything. To assume they always get saved is to also assume an unlimited amount of space for an indefinite period of time, etc.
You review the settings and their defaults.
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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I do not assume, I'm asking if the mqtt spec. Specify that messages is retained in the queue if the target in offline.
I am perfectly aware of space and time limitations.
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Dag Sunde wrote: I'm asking if the mqtt spec. Specify that messages is retained
Why not read it and see what it says?
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If you don't know...
I have trouble finding it in the spec.
I don't ask for help on things before I've tried to look it up myself.
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Your question asks what the spec says. I merely suggested that you can read it yourself in order to find the answer.
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Because the content is bigger than the container, and the default (usually) is to add scroll bars unless you turn them off (for the container).
It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food
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Thank you So much, is there any quick code to fix it please ? i really appreciate that.
thanks once again for your response
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The horizontal Scroll bar generally comes you have wide content or a fixed-width element that is wider than the viewport. It may also occur because of other factors.
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Set the width of the container fix. so that the content of website cannot change the width of the container.
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