RFID: Tutorial on integrating RFID in NodeRED environment using IBM BlueMIX Technology

The linked Tutorial gives a brief overview of all the steps that are necessary to integrate a RC522 RFID Reader via Raspberry PI into NodeRED environment using IBM Bluemix services, watson IOT and nodes.

Very interesting and quite easy to do:

https://developer.ibm.com/recipes/tutorials/reading-rfid-mifare-cards-into-watson-iot-platform-using-your-raspberry-pi-3/

RFID-Tags Read/ Write with Raspberry PI and RC522 MIFARE RFID-Reader

A very helpful tutorial if you plan to use and install a RFID Cardreader and how to do it with a Raspberry PI Mini-Computer (sorry, only in german ):

https://tutorials-raspberrypi.de/raspberry-pi-rfid-rc522-tueroeffner-nfc/