RFID-Kit - Projekteinführung (1/3)

Our blog post today is the introduction to the three-part series on our RFID Kit:


At the end of these three days you will know:

- What our RFID Kit and how you set it up

- How you can use our RFID Kit can write and read

- As with our RFID Kit is possible to install a computer access permission




RFID stands for radio-frequency identification and thus means a technology in which a receiver can read and write the data of a transponder. The receiver is the only device that requires a power supply. The transponder is addressed exclusively via magnetic alternating fields and does not require its own energy storage. The data stored on the transponder, which the receiver reads out, can also be changed.


The AZ-Delivery RFID Kit comes as standard with two transponders and a reader (right).


The figure shows our RFID Kit, which comes with two transponders (i.e. passive devices from electronic terms). One is white and has the size and feel of a credit card, the other is much smaller and can be attached to a key, for example. The blue board combines both read and write functionality. In this blog post we will explain the basics of the RFID module and set everything up so that you can follow in tomorrow's blog post "RFID Read and Write" how to describe and read the transponder, i.e. the chip or the key card.

The technology already has many applications: modern bank cards include RFID transponders, today's smartphones can read as well as write, and RFID tags were also used in less obvious areas such as the 2017 WSOP Poker World Championship. In the latter case, to identify the players' unopened cards at the table for live broadcast. Typically, multiple transponders are required. For example, if different residents should have access to the self-made safe, which is locked by RFID, then everyone should have their own smart card. For this reason, these RFID transponders in a package of 5 available at AZ-Delivery.



Before you can start programming Arduino, the pins must be soldered to the board. It should only be noted that the soldering iron should not be attached to the contacts for too long, so that the chip does not suffer damage due to the heat. After soldering the eight pins, they can be connected to the microcontroller. We use an Arduino Nano here, as it is small and therefore can be easily hidden in a safe, behind a door or in similar places. The cabling is shown in the following table.

RFID module



3.3 V

3.3 V

Positive supply voltage








not connected



Data transfer (Master In Slave Out)



Master Out Slave In



Data transfer (Clock)



Data transfer (data)

Code Library


To get started with programming, we start the Arduino Development Environment (IDE) (Link https://www.arduino.cc/en/Main/Software). For example, the MFRC522 RFID library by Miguel Balboa is suitable for a simplified control of the RFID module. This can be downloaded from GitHub. Click in the repository (link https://github.com/miguelbalboa/rfid) on Clone or download > Download ZIP. You can import the downloaded ZIP file directly into the Arduino IDE by selecting Sketch > Include Library > Add. ZIP Library... and selects the downloaded file.

The installed code library contains a variety of examples. These can be used in the Arduino development environment via File > Examples > MFRC522 be called.

In our blog post below, we explain how you can describe and read an RFID transponder. You can find the tutorial on this from tomorrow on our blog at az-delivery.de, so it's best to check back every day to find exciting tutorials and great projects every day!


Team AZ-Delivery

Projects for beginners

1 comment

Franz-Georg Neurieser

Franz-Georg Neurieser

Bei diesem Tutorial wird das Bild “https://cdn.shopify.com/s/files/1/1509/1638/products/AZDelivery_RFID_RC522_Set_-_Hauptansicht_large.jpg?v=1497311611” nicht angezeigt. Versucht man es direkt aufzurufen, erhält man die Meldung: Sorry, the page you’re looking for could not be found. Try the home page.

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