Hi,
I'm a Electronics Engineer. I have +5 years of experience with microcontrollers (Atmel, PIC, ARM, etc), and Bluetooth modules (HC-05,06, HM10, etc). Also I could give you more tips to improve your design. If you need reduce your hardware it could work with Bluetooth-based microcontroller. Well I would like to work with you in this interesting project and share my experience in this type of projects.
Regards!
Jhon Zumaeta