I believe I have it set up and running on a PineTime device, but it would be great to have some documentation on what it looks like to the nRF Connect app. What services and characteristics look like there.
/* Custom Service Variables */ #define BT_UUID_CUSTOM_SERVICE_VAL \ BT_UUID_128_ENCODE(0x12345678, 0x1234, 0x5678, 0x1234, 0x56789abcdef0)