NFC tags cost around $2.00 each so they are substantially more expensive than barcodes. However, NFC tags and tokens are difficult to fake compared to visual barcodes. We refer to NFC tags as a better “proof-of-presence” because the codeREADr app can be configured to only read the UID and reports can show that it was the UID that was read.
While it may be possible to buy NFC tags from disreputable sources using fake UIDs, for this use case it seems unlikely the worker would do that. Whereas with barcodes, they can simply take a picture of the barcode.
1. To avoid potential interference when placing NFC tags on metal services, we recommend buying labels or tokens meant for placement on metal. The additional cost is relatively small and generally worth the expense. Why? Because then when your team applies tags they won’t have to know what’s under the surface.
2. You should ask for a CSV file of the chip manufacturer’s UID (Unique ID) for the purchased batch of tags. This is important since the UIDs will be used in the database of locations.
3. To aid in the placement of tags on-site, we recommend the tags include a printed, human-readable, sequential number. For example, sequential numbers could be a_0000, a_0001, a_0003, etc.
In that way, the placement of the tags is much easier. Why? Because when placing the tags you can follow the sequential numbers which would also be in a placement spreadsheet showing the number and placement location.
Also, the tags should be delivered in that sequential order and include a CSV file associating the sequential numbers to the manufacturer’s UIDs.
4. You will create two spreadsheets in Excel, Google Sheets, etc. One will be for placement and the other for uploading to a codeREADr database to validate against. A placement spreadsheet could look something like this:
Then, the CSV file to upload to codeREADr would look like this:
5. Tags must be NDEF compliant, even if you don’t plan on writing to the tag.
6. GoToTags in the USA is an online resource to purchase NFC tags. For example, a “dome token” with an NXP NTAG213 chip may be a good choice. Another online resource is Seritag in the UK. For example, their “disc tags” may be a good choice.