Hi
I have checked your projct description and can help you on this.
I am familiar with micro controllers and arm based processors firmware development and also embedded linux kernel porting with rk3288, anyka series for bio recognition devices.
I am also fully feeling comfortable working with peripherals like rs232, rs485, usart, i2c, and also user end applications which integrates micro controller devices with user end computers and also android devices like BTE/BLE OTA.
Hope to hear from you about further details on this project.