Hello,
Currently I am working on a project that consists of the realization of a connected bracelet. This bracelet itself will have a single function that will alert the user when his phone is disconnected from the bracelet. So the bracelet will prevent phone losses. To be more precise, the bracelet must be permanently connected with the phone and when the connection is broken, the bracelet must alert the user. So I'm not trying to insert all the latest features of the connected bracelets.
At the moment, I managed to make a prototype thanks to an Arduino uno and a Bluetooth module. The problem is that the Arduino takes too much space so I would like to use a microcontroller suitable for bracelets.
But I have no knowledge of other types of microcontrollers that may exist. So I ask your help to tell me the types of microcontroller that I should use and also how to program them. I also ask you to tell me if there are Bluetooth modules suitable for bracelets. I also ask you to try to detail everything because I have absolutely no knowledge about the microcontroller that can exist or how to connect them or how to connect them to the computer or how to program them. So I assure you that all I know is the Arduino. So I seek your help because I am completely lost for months and despite my research on the internet I feel no longer advanced in my project. Please, I need help.
And also if there is someone who knows how are made and assembled pieces of bracelets connected, I would love to know.
I thank you in advance