Steve,
It's not a card reader. I'm talking about the tags. How do I find out which tags (text) that are compatible with Appinventor.
We are aware that appinventor doesn't support all tags which is why we asked the question.
If we can find the appropriate tag, not the sensor information which we are already aware of, we could purchase the appropriate tags.
We've used a reader which works with our MIFARE Classic tags (both read an write), but the cups aia example does not work with the tags.
Is there anyone out there who could recommend the appropriate tag to purchase. Specs?