In IOT, what do they mean when you're asked to use a schematic diagram?
Where in IoT?
Here on the forum (if that is what you mean) and possibly other forums, helpers like to know what you have connected to each other so they can check for mistakes.
Real schematics will look like e.g. https://www.arduino.cc/en/uploads/Main/arduino-uno-schematic.pdf and it's drawn with dedicated software.
It's very acceptable to make a pencil / paper drawing, take a photo and upload it. E.g.
It clearly shows where the power comes from, how (and to which pin) the button and LED are connected and the value of the resistor (I forgot to add a reference (e.g. R1).
Use straight lines, no crisscross of wires.
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It's not just IoT; the 'language' of electronic circuits is the schematic. We also use wiring diagrams on the forum, especially as they represent reality better. Another way to think of them is that a schematic is the logical representation of a circuit, and a wiring diagram is the physical representation of a circuit.
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Okay, we are supposed to do a smart lab where the lab turns off lights but without human intervention, what components can we use to achieve this. I thought a PIR sensor...
PIR sensors only detect motion. So if someone is in the lab sitting down reading a book, the lights will turn off.
You have been tasked to ensure that BSU computer labs turns of the lights (without human intervention) of a particular lab that is no longer in use or has no active class/session.
i. Describe what components you’d use in order to accomplish the task.
That's the actual question
As your topic has nothing to do with the Arduino IoT Cloud (or IoT in general) your topic has been moved to a more suitable category on the forum.
Forgive me please, am just a new member
The way it works here is you show us a wiring diagram and the code in code tags after using Tools/Auto Format then we will give you pointers to solve the next problem. We are not a design house unless you want to pay then their is a section for that. Also we expect you to read the pinned post re 'How to get the most from the forum'
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I thought they detected Infra Red radiation but yes it has to also be in motion. In other words a living human body or cat/dog.
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Millimeter-Wave Radar is alleged to be able to detect movement associated with just breathing. I'm not sure how you would distinguish from other minute movement in a room but you could research it.
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I have used it and it is very sensitive, longish range and can even work through kitchen cabinets.
PIR will depend on the size of the room, it isn't very long range.