The initial idea was to do all the computing at OAK and then send the data to a dev nordic. I'm not the hardware specialist, so, I came up with the doubt about the possibility to do the project without an OS. With your answer I guess it won't be possible... So, guess I'm moving to a raspi 0 or something like this. If you know any other solution cheaper than a Raspberry Pi, I'll be glad to hear from you.
Thank you for your reply,