Presence and motion sensors

There are 3 types of presence and motion sensors.

• PIR sensors focused on detecting significant movement, such as walking and human movement. Low energy consumption and can be done with a small battery.
• Microwave type presence sensors, which can detect even the slightest movements, such as breathing. Great for detecting presence in a room even when a person is sitting and not moving. More energy consumption and require constant power supply.
• Combined, which can take advantage of the advantages of both the previous ones and also work when powered by batteries.