Where can I find a microcontroller with a battery and a bluetooth module?

Question

Bluetooth

Colleagues, can you tell me if there is a ready-made programmable device with the following features:
1. It is presented in the form of a box with a button
2. It has a bluetooth module, when the button is pressed, it sends a signal
. It is necessary to receive this signal on the phone (Android). There are no problems with reception, but what should we take as a basis for the box with the button itself?

Answer 1

Take a ready-made eval kit from TI. A very worthy piece of iron and a ready-made case ... it was specially developed for such needs.
www.ti.com/tool/cc2541dk-mini

Answer 2

A microcontroller is a microcircuit. You just need a controller.
See this comment
If you do it yourself - the HC-05 module and the button will handle it. It will be about 5 times cheaper.