Hello guys, this is my first time posting.
I have a design that I want to do. The design is all about preventing the situation of forgetting a baby by himself inside of a locked car. For this, I am planning to use some sensors withing the car seat such as (temperature, weight, etc) and then use an arduino microcontroller to control them. One of the features that I wanted to add is to detect the proximity between two points. The first one is the car seat and the other one is the user or designated driver. My question is, what is the simpler approach to have this ? I was thinking to use a bluetooth connection between the microcontroller and the cellphone to detect the proximity but I read that is not really possible to detect range or proximity with a bluetooth signal. another way that I was considering is with a RF transmitter and receiver but I dont really know how this works. By any chance any of you have an idea on how to properly implement this ?
Thanks a lot!