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Topic: Interfacing 902-928 MHz(US) RFID Reader to Arduino (Read 157 times) previous topic - next topic

cabalza

Hi. We are kinda troubled on interfacing our RFID reader to arduino board (attached here is the specs of our RFID reader). This is our first time to use RFID readers and unluckily, the reader we have can't be found on the internet. Can we ask for help with regards to the connection of this reader to arduino? We badly need it specially we will be having our defense this coming week. I hope you will consider responding with this post. Thank you so much.

Grumpy_Mike

The simplest way is to use the RS232 interface. You will will need to convert this into TTL levels using a chip like a MAX202.

However that data sheet says nothing about what instructions you need to feed the reader down the RS232 lines.

cabalza

Thank you for responding! :)
Yes and maybe it is the reason why we are finding it truly hard to interface the reader to the reader . What do you recommend us to do?

Grumpy_Mike

Wire it up and see if the default settings send a card number over the serial port without being prompted to read.

If you get no joy then open up the reader if you can and get the chip number of the main device and see if you can find out about that. Mind you if that turns out to be just a controller then you are no wiser.

Paul_KD7HB

The simplest way is to use the RS232 interface. You will will need to convert this into TTL levels using a chip like a MAX202.

However that data sheet says nothing about what instructions you need to feed the reader down the RS232 lines.
Actually the link identifies the protocols used by the device. You have to search for the document detailing the protocols.

Paul

Grumpy_Mike

#5
Mar 18, 2017, 06:18 pm Last Edit: Mar 18, 2017, 06:19 pm by Grumpy_Mike
Quote
Actually the link identifies the protocols used by the device.
Missed that can you say what it is?

Paul_KD7HB

Missed that can you say what it is?
Sure:

<ISO/IEC18000-6 TYPE B>
<ISO18000 Part 6 Parameters for air interface communications at 860MHz to 960MHz>
<EPC RFID Protocols Class-1 Generation-2 UHF RFID Protocol for communications at 860MHz to 960MHz>
<800/900MHz RFID Technology application implementation regulations>

I think I picked the third one to Google and there is a very extensive document detailing all the commands and returns.

Paul

Grumpy_Mike


cabalza


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