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Author Topic: Interface with RFID module not working  (Read 1400 times)
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I am building an automated cat feeder from these instructions at Instructables.com:
http://www.instructables.com/id/RFID-pet-feeder/?ALLSTEPS

I have just started reading a book on programming the Arduino, so a programmer I am not.  Not yet.

The author of the instructable has provided sketches for testing various systems prior to final assembly.  I have run 4 of them successfully, but I have a problem with the fifth sketch, which tests the Seeed Studio RDM6300 RFID module.  Here's the sketch:
http://www.writtensound.com/arduino/dc_motor_with_stoppers_and_buttons_and_IR.pde

And here's the data sheet on the RDM6300:
http://iteadstudio.com/store/images/produce/RFID/125KReader_U/RDM630-Spec.pdf

The sketch compiles nicely but on upload I get this error message:

Binary sketch size: 5,280 bytes (of a 30,720 byte maximum)
avrdude: stk500_getsync(): not in sync: resp=0x00

I did the wiring of the RDM6300 per the author's instructions:

If you use a Seeed studio RDM630:
Connect the TX pin of the RDM630 to the RX (pin 0) of the Arduino
Connect the +5V pin of the RDM630 to the +5V of the Arduino
Connect the GND to the GND of the Arduino

Although the author specifies the model RDM630, I am using an RDM6300, which is an improved model, plug-in replaceable.

What does this error message say about what's going on?

I suspected that the RDM6300 was not working, so I bought another one but got the same result.  Don't be afraid to tell me that I have TWO bad RDM6300s.  I can always take a stress pill  : ))

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While uploading, disconnect the RFID module from the Tx/Rx pins.
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@lesizz

Please email support@iteadstudio.com for confirming the RDM6300 doubts. Please send along with this post link for reference. Thanks!

Best regards,

Wendy
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The RDM6300 is now a discontinued product.
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