Check this out. A simple hello-world app with the RFID module on it and NO functionality whatsoever. I can tap, tap, tap the tags, the reader responds pretty snappy (has its own LED’s).
Works GREAT on USB power from PC, via USB Client SP, on Cerberus.
Now plug it into battery (via USB Client SP). Battery has a good charge (batt type is same as used to external power/charge cell phones). Tap once, it responds great. Tap again… nothing, again… nothing.
If that’s not weird enough, it gets more weird. If I tap with a DIFFERENT tag and alternate them, tap A, tap B, tap A, tap B… no problem! Works great!
Why on earth is it refusing to read the same tag more than once??? And how in the world does being on battery vs PC power have anything to do with it? It’s this kind of issue that makes it very disconcerting whether your app and device will work outside of the dev enviro!!!
Clearly not a power issue, as it reads [em]alternate [/em]tags quickly, just fine.