I at long last soldered the Arduino RFIDshield yesterday – and must admit that I am having a few problems, where it (very) occasionally recognises the supplied tag (and The Students Oyster card) – but most of the time it just sits there scanning with no results.
So I did a search – and have found others with the same problem :
Last week I ordered a RFID shield for Arduino via Marc Boon (who also organizes regular workshops on RFID here in the Netherlands). Friday evening I soldered it together, using the easy to follow instructions Marc sent with the kit.
The ready RFID shield mounted on to the Arduino.
Currently I am troubleshooting the RFIDuino. It seems to start up all right, as it nicely announces itself when connected to the serial monitor in the Arduino software. Green LED lights up as well, meaning it is scanning for RFID tags in the neighbourhood. However it does not see any, when I put a RFID tag on the antenna. Perhaps something wrong with the antenna. Or it may be a power issue (USB port not delivering enough power to the board), however that seems unlikely because the active part of the RFIDuino is working fine.