How do I move from nRF52 DK to built prototype

[JAC]

Hi,

I have my project working using the nRF52 development board.

A BMP280 pressure sensor is connected TWI to the board and pressure measurements are sent over bluetooth to my mobile phone.

I want to get a PCB built with just the components I need.

Is there a reference design that has a nRF52840 processor supporting bluetooth communication, connection to a sensor over I2C and connection by micro-usb over UART and a holder for a battery?

Any ideas on how I can realise my project would be great.

Many thanks,

John A.

[RK]

There's a reference design for the nRF52840 in various configurations (LDO, DC/DC) where all the GPIOs end at the edge of the design. If you want to add your own peripherals and power supply to that, that's the bit you're there to do, take the basic reference design and then add what you need. Obviously Nordic can't produce a reference design for every possible combination of peripherals. You do also have the design for the nRF52 dev board you can refer to, so you can either add to the basic chip layout, or take the dev board layout and strip out what you don't need.