There are a few types of motion sensor based on the overall aim of the device, but they all work in a similar way. A passive infrared sensor (PIR) can detect movement by measuring infrared light reflecting off objects in its field of view.
The different aims of a motion sensor are:
If you know the house is meant to be empty and a motion sensor detects movement then you may have a security issue on your hands, so you can act. Or, maybe you want to check someone has arrived home and like to get a notification that movement has been sensed in the hallway as they arrive through the front door.
Set a sensor up by your front door for when you come home, so the lights and heating immediately come on in Winter. You could also pop one in the hallway or bathroom for those visits to the bathroom during the night when you spend ages hunting for the light switches. It will instead detect you approaching and do it for you.
Window And Door Sensors
These are designed to let you know when a window and door is open. So whether you want to check what is open before you leave the house easily, check when people come and go when you’re at work or need to ensure nobody gains access when you’re away, there is a multitude of uses depending on your needs.
The most common entry route for burglars is unsecured windows and doors, and locking them doesn’t guarantee 100% safety. When combined with other sensors and cameras, they can help you act before any damage is caused.
These are portable sensors, designed to tell you where an item is. Whether it is your keys, purse, bag or cat, they can alert you when they are out of a certain distance range or emit a sound so you can find whatever they are attached to.
There are a few limitations with them. They don’t always tell you where the keys you dropped in town actually are, or where the cat has wandered off to. Therefore, they’re best for anyone who misplaces items in their home within hearing distance, but some can provide map data.
Most of the above will require a smart hub of some sort to work, whether it be their own brand or a general one such as the Google Home Hub or Echo Dot. They can give the item an internet connection if they aren’t standalone wireless appliances, which is important for allowing them to communicate with your smartphone or tablet.
Hubs also allow all of the separate items to communicate with each other and set up schedules and relationships.
If you want to opt for a general hub, then you need to ensure your sensors work on the same frequency. Some will only work with proprietary models, so bear it in mind.