RFID Unit issues
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Hi,
I'm using RFID Unid with RFID cards and I experience problems.
I can read UID, if card is on, read and write blocks however I need to go out and put the card back between each command otherwise it doesn't work.
For exemple, if I send 2 consecutive isCardOn(), only the first one returns True, the second one and more return False.Is there anyone who has experienced the same problem?.
Thanks
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that is so weird. did you have another card for the test? or all card has same situation?
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Hi,
Thank you for your reply.
Yes, I tried with 3 other cards and it's the same.
I have done more tests and it is very surprising.The RFID card is located on the top of the device.
In an infinite loop, I just continuously check isCardOn () and measure the time between each detection.
Without moving the card of the device, I measure 11 detections continuously with 1.2 seconds between each detection and nearly 6 seconds between the 11th and 12th then another 11 measurements with 1.2 seconds .....If I remove the card and put it on quickly, I can measure times less than 1 second.
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Hi,
I found a solution.
I have to limit the I2C frequency to 100,000kbps otherwise it won't work properly.
This is strange because a frequency of 400,000 kbps works for all other devices and the MFRC522 should work fine at that frequency.If anyone has any idea on this limitation, I am very interested.
Thank you
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