Hey, I just wanted to share a link to an eBook that many users of Spark should find useful. It gives a comprehensive overview of routes to market using pre-certified (or non-certified) wireless modules for the FCC and CE.
Let me know if you have any specific questions about FCC certifications - I used to own an FCC lab.
www.emcfastpass.com/cert-ebook/
Cheers,
Andy.