Distanced RFID reading

Projects General Guidance
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Not sure if this is the right category to post on but I need some help.

So a project I’m creating is basically an inventory robot based on one that we use where I work but a simple version of it for school project. I require a Arduino build on top of an rc car that I can control to slowly go down aisles and count the stock on the shelves, I have 125khz rfid tags. So I just need it to list all the rfid tags it passes. My main issue is distance as a lot online require the tag to contact the reader, distance would be around a metre if not less

I want to know what I need to be able to make this possible electrical wise, so it’ll sit on an rc car and have a custom built casing for it.

I have almost 2/3 of a year so build this and need help

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I moved it to "projects / General Guidance", it feels more appropriate than "Interfacing w/ Software on the Computer"

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Thanks, i appreciate it

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Would that not destroy any of the cards in the region? Would not an inventory system just want to read the cards? Anyway, looks like you are going to have a very long development time ahead of you. Are you able to build and test a series of readers/writers with increasing ranges until you get one that will work properly?

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I meant like it’ll write down the ones it passes as in like make a list of the ones it passes, sorry I should of worded it better, and I’m looking for recommendations on rfid readers so I don’t have to spend heaps of money just for one to work

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Here is the basic problem with your system design. How will your system ensure there are no RFID devices that that are skipped and not read by your system? That is the primary reason for any RFID device to only be active when a person is right there to ensure it is read or not read or does not produce an error message.
There are NO devices that would reliably do what you are thinking about. And reliability is the key.

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Well there are heaps of devices that can do this so why don’t you go for a quick google and of course someone’s going to be there if it’s movement form is an rc car, I never said it will be perfect it is just a school project that I want to attempt to make, I understand that there are some downfalls in the system, no system is perfect but it is possible to do with some right assistance

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Pick one and get on with the project!

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If tags will be close together, be sure to pick a tag/reader combination with a proven anti-collision feature, and read the specifications very carefully to see if it will actually function in your hypothetical application.

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Read that out loud and see what sense it makes. The try and write something that makes sense.

Reading an 125KHz tag normally requires a distance of less than 5cm. If two tags are in the same field then nether tag will work.

Make sure this is made with wood or plastic, do not use any metal screws. You can get nylon nuts and bolts if you like to keep the housing metal free.

I would expect the metal in the motor of your RC car would also interfere with your RFID readings.

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Reading multiple tags within a certain distance does not come cheap and requires a different frequency (High Frequency like 13.56MHz)

Here is an example of a kit

Instead of the frisbee flying next to the antenna you’ll have the antenna moving next to the RFIDs

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