i need a programmer

EXPERIENCED DEVELOPER... PLEASE CHECK MY BADGES, PROJECTS AND REVIEWS and ensure yourself that I can do his very well and very quick... I already developed Gatekeeper system for Lodi (CA) High school that is similar to your requirements...

We are experienced in such kind of smart devices. Have worked on hardware and software of devices capable of wireless communication via different resources. Bar code scanning can be done in any small device like the one you told but than question is what else you want to achieve with in this limited capability device. I would have more query on hardware capabilities of your selected device first. I would also like to know how you target to save scanned data. Will it be locally into your device or would like to convey it further. Lets discuss it more.

Hi! I am a professional in such project. If you want perfect and fast work, please contact me. Thank you.

My proposal might be a little contradictory form your idea, but fitting a camera in the ring might make build a little too fragile. So, I propose using NFC tags instead which are more reliable and even weather resistant. I could pitch a better when I get to know what we are trying to accomplish at the end.