I did purchase a nRF51822-DK and did not find the product key. Where is it hidden?
It should be written on the box or the anti-static bag. If you didn't get a key, ask the Nordic support team: http://www.nordicsemi.com/eng/Support/Contact-Support-Team
It should be written on the box or the anti-static bag. If you didn't get a key, ask the Nordic support team: http://www.nordicsemi.com/eng/Support/Contact-Support-Team