I will need to design a PCB for the weather station, where I will place the BL600 and the super capacitor, amongst other things, but I will also need something to communicate to the BL600. Since the weather station should be small and as cheap as possible, I want to push the RS-232 to UART conversion, power supply and JTAG circuitry out from the main board. Therefore, I've designed a separate board for that (see pictures below).

The source files can be found here. Next post will be about the design of the main board.