after the card is removed, the led is turned off to indicate that the card should be removed and the system is ready for next card reading. i’m so lucky to work with some of the greats! you should confirm what you have, and possibly ask for some sample code from whoever owns the service. these make a crumbly mess but in the best way possible! nor has more money made much difference. many thanks; from everyone of us. i know you will be there eventually and i will witness it. 