I am completely new to working with BT, especially the idea of mating it with iOS. As I see it, my idea is quite simple, but I know I need to start with the hardware, then get the app coded to it. I am looking to build the attached. It is for a specific application, so need to function exactly as shown. I have tried to look around and seen some good guides for serial BLE adapters, but I need to make sure I have this right for the intended use. I have spoken to a couple of companies and gotten OTT quotes just to design the hardware, so thought I'd investigate myself. Any and all help would be greatly appreciated.I already have an idea for the battery pack, but adding a charging capabilty would be very handy.
This is blog is a good place to start https://embeddedsoftdev.blogspot.com/2018/02/bluetooth-le-with-nordic-nrf51-nrf52.html or contact me. I may have a solution for you.