Interesting idea but I have doubts that the camera would come close to doing bar codes reliably. You want to bounce a light off the code and read the reflection on the fly vs store a camera pic and then try to read it afterward. I haven't done bar codes for many years but there should be some USB devices out there that might work. I did this decades ago with a TRS80 and a VIC-20 and those were much less powerful devices than the N8x. (1MHz with 3KB RAM if I remember)