This is my old blog, I've stopped blogging here and moved to (English) and (Arabic)

Introduction to internet of things - IoT

We are developing tools that help us to live better. In the beginning, we developed the computer just for companies and institutions, it was big and heavy. After that, we developed a personal computer that is smaller and lighter and directed to the home and this means one computer for 4 or 5  persons. Next, we minimized the computer to make the laptop, and after a few years, we developed the smartphone. For all of that, you see that we start by one computer for a big part of people, and after that one computer for one family or small group of people, and after that one computer for one person, and in the last one computer for one person but small enough to be everywhere with us. 

this diagram can resume what I talked in the last paragraph:

And in the last generation, we aren't just moving with a computer in the packet, but we live in a big virtual computer that our devices are like components of this computer, the buses of this computer is the internet and the core is the servers.

But what have we forgotten?  😌
to move our life inside this "big virtual computer" we have forgotten to move our things like the lights, the beds ...etc to connect with this "big virtual computer", or to be components of this computer. The scientists and the engineers thought and in the last, we make something we call it: the internet of things or IoT.

The internet of things (IoT) refers to the set of devices and systems that interconnect real-world sensors and actuators to the internet.  The communication between these devices or systems with the internet or to a gateway, based in these models: direct Ethernet or WIFI connectivity using TCP or UDP, Bluetooth low energy (BLE), Near Field Communication (NFC), Zigbee, SRF and point to point radio links, UART or serial lines, SPI or I2C wired buses.

the the last diagram shows the two major modes of IoT, the mode in the right is more compatible with the things that can't use the WIFI or Ethernet cable to communicate with the internet, for that, we use the gateway like an intermediary between the cloud (or the internet) and the things.

So when we use the internet in general, we use the cable or the WIFI to connect the device we call it: the modem, but what about the things that can't use the WIFI? or internet cable?!, for that we use the gateway, and another one can ask: " why are these things don't just use the WIFI or the internet cable? Why does it use BLE or Bluetooth for example? that because in some applications we have a limitation in the battery or the size of the device, for that we choose Bluetooth or ZigBee or other technologies, so we can't change all these things but we can create a solution cover this problem.

there is more ideas to start an internet of things project, like the protocols and the tools we should to use to develop good internet o things project; this is just introduction, there is more in other articles.  

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