In this tutorial, I demonstrate how to use the RDM6300 and the RDM630 with an Arduino Uno. Other tags (for example EM4305 tags) do not (or might not) work with these readers. In my opinion, the price difference can be easily justified as the RDM630 is more robust and allows much higher reading distances.īoth readers work at a frequency of 125 kHz and enable to read EM4100-compatible tags. Usually, you should be able to purchase Seeedstudio’s RDM630 for about 10-15$ and the RDM6300 for about 1-3$.
According to my knowledge, besides the same technical functionality, they have nothing else in common (like same manufacturer, predecessor/successor version, etc.). Besides the similar names, another reason for the confusion might be that they share the same pin layout and transfer protocol. Seeedstudio’s RDM630 and the RDM6300 are two different types of RFID readers, even though they often get mixed up.
The RDM630 is more expensive (10-15$) but also more robust. On the left hand side is the RDM6300, which is a very affordable (1-3$) RFID reader.
