I'm wanting to connect multiple hardware devices to my app to send basic data to me,
such as when a light is turned on or off. For the project I'm working on all the hardware should be as
small as possible.
So my question is, how can I send data to my phone from multiple instances of my hardware and what would be the best and smallest hardware I can use for a project like this.
Hope the community can help me out since I'm fairly new to all this!