edit: That didn’t seem to fix it for me. What are the chances that the reader is bad? I feel like I probably messed something up…
I don’t have an available arduino to test it on either to verify if the device is working. I guess I can just order another one and see…
edit 2: before I order a new RC522, does anyone have a recommendation for another RFID reader?
I did find this arduino library for it, though which apparently has the read/write aspect figured out: https://github.com/miguelbalboa/rfid , which doesn’t help me if I can’t get it to work in the first place
@peekay123 , it didn’t work, HOWEVER, I’m really excited for this port when I get it working. I’ve got a really cool project that will really utilize this!
I’m pretty sure my card is bad – I just played a Saturday delivery for another one on Amazon, so I’ll be able to try it out in a day.
@mstelt, that is great news cause @austinpe was having a heck of time trying to make his work. He suspects, as I do, that he had a bad board so he ordered another one. Thanks for the infor!
So, interesting turn of events @peekay123 . I got my new board in, plugged it in and tried to register one of the cards from the original RFID package and it didn’t work.
I was pretty bummed and though the issue was somewhere with my wiring, but I tried to register one of the newer cards that came with the new RFID package… and that worked! I plugged in the old one and registered one of the new cards on it, so that one was working, but the cards weren’t!
tl;dr: The new board came and worked with the new cards. The old one works with the new cards. The old cards are trash.
Also, I tried the new library (the RC522 library) and it works! But, when I have the DumpInfo.ino loaded, and I scan a card it registers the card correctly, but then when I pull the card away I get an endless stream of:
59 MIFARE_Read() failed: A MIFARE PICC responded with NAK.
58 MIFARE_Read() failed: Timeout in communication.
57 MIFARE_Read() failed: Timeout in communication.
56 MIFARE_Read() failed: Timeout in communication.
55 MIFARE_Read() failed: Timeout in communication.
54 MIFARE_Read() failed: Timeout in communication.
53 MIFARE_Read() failed: Timeout in communication.
52 MIFARE_Read() failed: Timeout in communication.
51 MIFARE_Read() failed: Timeout in communication.
50 MIFARE_Read() failed: Timeout in communication.
49 MIFARE_Read() failed: Timeout in communication.
48 MIFARE_Read() failed: Timeout in communication.
@austinpe, that is really frustrating. A good board but useless cards!! So, if I understand correctly the original and new libraries work well except for that message loop. I will take a look to see what I can find. I am glad that it is working though
On the first library, if I put the card next to the reader and hold it there it’ll go back and forth saying “Card Detected” and “Card not Detected” but, I’m sure that’s just a polling issue that I can look into.
Sir, i have try this program, and its working.
but i have 2 RFID MRC522 for 1 arduino.
how can i initiate my RFID with RFID1 and RFID2 in my arduino, so my arduino can detect a card tag from each RFID,
example, RFID1 detect tag1 and RFID2 detect tag2.
@arideba, is this regarding using two MRC522 units on the Spark or on an Arduino? Either way, the way the library works is that you create a reader “instance” by using its constructor like this in the examples:
Notice that you pass two values - the SS or chipselect pin and the RST or reset for the MRC522 board
So, to use a second board, you would create another instance and specify a different name (mfrc522 in the example above) and different SS and RST pins (so you need two extra pins) like this for example:
Of course, you need to define SS1_PIN, SS2_PIN, RST1_PIN and RST2_PIN in your code. The SPI connections (MOSI, MISO, SCLK) stay the same and goes to both boards. Then in your code you refer to each reader separately.
Please note that I removed the other topic you created with the same question.
@peekay123 Thanks for your reply…
i will try the code,
i will take the data from tag and RFID to the database, in my case i use mysqlserver,
that i want to ask, which one better i use, i put the data in my tag card or only pass the unique code from card and then in database i make database based on the unique code ( i make the unique code as the primary key).
@arideba, if you use the tags for uniquely identifying someone/thing and don’t actually need to store data in the tags then I would just use the unique ID and save having to write of extra code. Using that ID as your primary key is logical then.
@peekay123,
oh, so the best think is only how to pass the unique code from RFID and the tag to the database through the arduino right?
and, if i want to ask you some picture or video that show me how it works with 2 rfid and 1 arduino, please let me see it.
thanks for all your help
@arideba, I don’t have those RFID units! I gave you the necessary wiring instructions for hooking them up. I am still not clear if you are using an Arduino or a Spark Core for this!?
– I just played a Saturday delivery for another one on Amazon, so I’ll be able to try it out in a day.