Rfid Inventory tracking: Does each rfid reader module need a separate/dedicated

raynel1

Rfid Inventory tracking: Does each rfid reader module need a separate/dedicated javelin stamp? Or can a single javelin microcontroller read from multiple rfid reader modules - if so, how?· Please reply with specifics - thank you.

John R.

I'm not into the Javelin, but on the basic Stamps, you can read more than one reader. You just need to give each reader it's own pins for communication and read enable.

Assuming you have some type of "reader" object, you'd initialize an object for the first reader, assign the pins, and that ones good to go. Initialize another object for the second, assign a different set of pins, etc. The only "gotcha" I can think of would be if you can't have more than one "reader" object in existance at one time, or if you can't specify two readers with different pins. Again, I'm not a Javelin user.

Depending on how much other work your Javelin is doing, and how many other pins are in use, you could problaby read more than two readers.

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John R.

8 + 8 = 10

Jon Williams

Each RFID reader has a serial output -- you'll need a receive UART for each.

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Jon Williams
Applications Engineer, Parallax