Unable to generate hex codes for custom program

[chirag.adiga]

i've been trying to generate hex files using keil uv5 from the examples given in the nrf52 sdk, the pregenerated hex files work as expected, wheras the ones generated by keil is not and is quarter the size in Kb. can someone guide me to the solution? my aim is to implement a change in value of a GATT service by a press of a button. Many thanks in advance

[ketil]

Hi,

The pre-compiled hex files include a SoftDevice and the size is therefore larger. What you are doing seems correct, just make sure that a SoftDevice is flashed before uploading your application.

I recommend the Custom Service Tutorial if you would like to learn more about modifying services and characteristics.

Ketil