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Topic: RDM6300 125kHz reader - RX & TX (Read 2052 times) previous topic - next topic


Apr 09, 2020, 11:48 am Last Edit: Apr 09, 2020, 12:50 pm by g82perinet

Well, I have read many posts about RDM6300 and other websites such as tutorials but I can't work out how to use the 125kHz module with Arduino.
So far, I have connected the aerial on its connector, put the GND and the Arduino 5V on the module power supply. I try with no success to receive data from the TX pin of the module. Is the module plug and play, I mean we only have to connect GND and 5V to see activity on the TX pin?
=> I have checked with the oscilloscope and I have signal activity :
  - on my tag aerial
  - at the input of the first OpAmp stage
  - at the output of the first OpAmp stage
  - at the output of the second OpAmp stage
and I actually a very clear signal for all of them. On TX and on RX pins, I have a very flat 5V.
=> I have checked with :
  - a FDX-A tag (AVID protocol)
  - a FDX-B tag (ISO protocol)
  - a EM4102 tag
So I can't figure out why I have no activity on TX of the RDM6300 module... Do I have to send a message from the Arduino to activate the TX ?
In case, I attach the 3 screenshots
Any help or hint is deeply appreciated.

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