Open Print Tag NFC reader

[Kosaro]

Have you thought about what NFC reader to use for Open Print Tags?

I expect the PN532 not to work because its not compatible with the ISO 15693 standard that I believe open print tags use.

I found the PN5180 which seems like it would work, but I'm not sure how good the software support is for the PI.

[bofh69]

I've not yet started to look into what hardware is available.

I'll get some tags tomorrow. I suspect Prusa has chosen tags with support for both standards to be compatible with most phones, so it might almost work with the old reader. Unfortunately they have not specified which side they should be on as they think being able to read from both sides was a better idea.

I don't know if the hardware can allow you to sort the tags depending on distance. If so, it could be nice for MMUs, reading all spools/slots with one reader.

[Kosaro]

I'd be interested in learning what you find out! I've ordered a PN5180 to tinker with and see what it can do.

[bofh69]

I've ordered one too, but it uses a lot of pins on the RPi, so I'm thinking of connecting it to a RPi Pico instead. Then using either NXPs library or some Arduino library for accessing the tags.

[bofh69]

FedEx was as slow as ever, but today I got a Prusament spool with a tag and empty tags.

NXP's tag writing android app could copy the content from a spool's tag to a NTAG215. Prusa's app could read a spool's tag or QR code and write the content to a NTAG215 as well. Prusa's app can no longer read/write to NTAG215.

My PN532 reader could not read the spool's tag. Prusa's python code could not read the NTAG215, but I rewrote it quickly to just read their new NDEF record's payload and that worked.

[bofh69]

I've made a small project for using the PN5180 from python (via a RPi Pico Zero): PN5180-tagomatic.

It has enough functionality to work with nfc2klipper now, but I've not yet tried to integrate them (don't think it will be that hard). The module can be used to read Prusas tags' memory and the data should then be readable by their python code. It can also read ISO-14443A tags.

[bofh69]

There's a PR with support for it now.

My driver doesn't yet parse NDEF records, so it doesn't support OpenTag3D nor the old nfc2klipper format when the PN5180 is used. It will still search in Spoolman for the nfc_id for ISO-14443A cards so one can still use it with old tags (if one has stored the nfc-id in Spoolman).

I won't merge it until that's handled too.

[jasperchua99-cloud]

how about using https://shop.m5stack.com/products/rfid-unit-2-ws1850s

it uses i2c which can save a lot of the wiring

[bofh69]

how about using https://shop.m5stack.com/products/rfid-unit-2-ws1850s

it uses i2c which can save a lot of the wiring

It seems like a nice reader, but from their description it only supports ISO14443 cards. It is also not supported by nfcpy so it can't be used with nfc2klipper for old tags.

OpenPrintTag is based on ISO15693, those two standards are not compatible.