Determining how long a person has been away from an object

Hello,

I am trying to figure out a way to determine how long someone has been away from an object. For example , how much time has passed since the last time I laid down on my bed, or opened the refrigerator.

I have experience with python, but I have no real knowledge about IoT, sensors, wearable technology, etc. I would like guidelines on the best way to build such projects, and learn about the technical skills to solve the problem mentioned above. Also, I would appreciate learning about any Arduino tools/products that could help eventually complete my project and build a prototype.

Thank you!

Welcome.

What sensor are you thinking to use?

Arduino links of interest.

How to use this forum:
https://forum.arduino.cc/index.php?topic=149014.0

Listing of downloadable 'Arduino PDFs' :
Either Google >>>- - - - > arduino filetype: pdf
Or
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Listing of downloadable 'C++ PDFs' :
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Arduino cheat sheet:

Troubleshooting common errors:

Watch these:
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Some things to read

https://learn.adafruit.com/category/learn-arduino

https://learn.sparkfun.com/tutorials/how-to-read-a-schematic

Language Reference:

Foundations:

How and Why to avoid delay():
http://playground.arduino.cc/Code/AvoidDelay

Demonstration code for several things at the same time.
http://forum.arduino.cc/index.php?topic=223286.0

Useful links:
https://forum.arduino.cc/index.php?topic=384198.0

Arduino programming traps, tips and style guide:

Jeremy Blume:

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Motors/MOSFETs

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Share tips you have come across, 500+ posts:
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Debug discussion:
https://forum.arduino.cc/index.php?topic=215334.msg1575801#msg1575801

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crioux:
I have no real knowledge about IoT, sensors, wearable technology, etc. I would like guidelines on the best way to build such projects, and learn about the technical skills to solve the problem mentioned above.

Not a simple project at all, but interesting.

A couple of years studying for an electronics\microcontroller qualification might be a good place to start...............

crioux:
I am trying to figure out a way to determine how long someone has been away from an object. For example , how much time has passed since the last time I laid down on my bed, or opened the refrigerator.

There will be a huge difference between identifying when the fridge was last opened and when person X last opened the fridge.

You could probably fix up a small microswitch that gets triggered whenever the door is opened and an Arduino (or Raspberry PI) could detect that and make a note of the time. But that would not identify the person who opened the door.

An Arduino would probably need a Real Time Clock (RTC) module to get reliable times. I suspect an RPi has that built in.

...R