Raspberry Pi Automation

From complex to simple... This is really the motto of this blog. And the goal is to try to explain and teach something that could look complex to some people in a way that they will find it simple. Goal of this implementation Automate the on and off of the light in my living room. Why it is useful When I arrive home from work, around 7:00 PM, I open the door and see nothing. I look for the switch in the wall with my hand and turn on the light. I don't want to keep this light turned on, this is the roof light, so I walk some meters, kneel down, and turn on a small lamp that I like to keep turned on. Then I go back to the switch next to the door and turn off the roof light. At night I go out for dinner or any other event. When I return home I probably will go to the kitchen to drink water, then to the bathroom and then to the bed. This journey takes me around 2 minutes, and I don't want to keep looking for the switch and turning on and off the lights every time,