Hacking (How) can i rewrite a nfc tag?

[WiiFoundLove]

Hi!

I am using Tagmo for creating amiibos. I would like to overwrite an already written nfc tag. Is this possible? If yes,how? I can't write tag on a nfc chip that already has a written tag. I can restore the tag using "Allow restore to different tag", but the switch doesn't recognice any change. Beside this I don't see any other option.

So is there a way to do this?

Thank you

 

[Shadow#1]

Hi!

I am using Tagmo for creating amiibos. I would like to overwrite an already written nfc tag. Is this possible? If yes,how? I can't write tag on a nfc chip that already has a written tag. I can restore the tag using "Allow restore to different tag", but the switch doesn't recognice any change. Beside this I don't see any other option.

So is there a way to do this?

Thank you

Yes if it's the rewritable kind

 

[WiiFoundLove]

Ouh, so there are non rewritable tags? urks

 

[Hayato213]

Ouh, so there are non rewritable tags? urks

You can spend more money and get a powersaves powertag.

 

[Shadow#1]

You can spend more money and get a powersaves powertag.

A N2elite is just better to buy

 

[Hayato213]

A N2elite is just better to buy

That work too.

 

[kerelenko]

Power tags writes to 100x max. It's dead afterwards. Best is to just buy hundreds of cheap ntag 215 stickers from Aliexpress or better yet use emuiibo and emutool if using them for switch.

 

[Draxzelex]

Hi!

I am using Tagmo for creating amiibos. I would like to overwrite an already written nfc tag. Is this possible? If yes,how? I can't write tag on a nfc chip that already has a written tag. I can restore the tag using "Allow restore to different tag", but the switch doesn't recognice any change. Beside this I don't see any other option.

So is there a way to do this?

Thank you

Apparently if you rewrite any nfc tags used for amiibo, Nintendo devices will no longer recognize them.

 

[Shadow#1]

Apparently if you rewrite any nfc tags used for amiibo, Nintendo devices will no longer recognize them.

Not true for Amiiqo/N2Elite

 

[kerelenko]

You can spend more money and get a powersaves powertag.

If I'm not wrong power tags has a max rewrite limit of 100 then they stop working

 

[Shadow#1]

If I'm not wrong power tags has a max rewrite limit of 100 then they stop working

Your right

 

[menadwen]

You can use this android app to send amiibos to you switch.
https://play.google.com/store/apps/details?id=com.catalyst06.joyconenabler&hl=en&gl=US

 

[Draxzelex]

Not true for Amiiqo/N2Elite

I know Reddit is not exactly the best place of information but that is where I read about it.

 

[Shadow#1]

LOL

 

[Shadow#1]

I know Reddit is not exactly the best place of information but that is where I read about it.

LOL

 

[DocKlokMan]

So, technically the reason why you can't re-use NFC tags is that Nintendo checks for a "read-only" flag that must be set before it'll accept an amiibo. If this flag is not set it rejects the data. So amiibo writers need to set this read-only flag to create a functioning amiibo NFC tag. If you wanted to, someone could make an IPS patch for the NFC service to remove that read-only flag check. Then you could make NFC tags that don't have the read-only flag set and they would work on your Switch and you could re-write to them. But they'd only work on Switches that had this patch.

 

[thesjaakspoiler]

The Switch checks if the NFC is write-protected.
If it isn't write protected, it rejects it.
As a result, you can't rewrite the NFC tag anymore.

The Amiiqo/N2Elite is not a NFC tag. It is a small microprocessor emulating a NFC tag.
Its flash memory can be rewritten thousands of times before it breaks down.
Power tags seem to use some different memory that can only be reprogrammed 50~100 times.

Instead of thinking about some funky service that disables the checks for NFC tags,
you could just as well use Emuiibo directly on the Switch to emulate the tags.

 

[DocKlokMan]

The Switch checks if the NFC is write-protected.
If it isn't write protected, it rejects it.
As a result, you can't rewrite the NFC tag anymore.

The Amiiqo/N2Elite is not a NFC tag. It is a small microprocessor emulating a NFC tag.
Its flash memory can be rewritten thousands of times before it breaks down.
Power tags seem to use some different memory that can only be reprogrammed 50~100 times.

Instead of thinking about some funky service that disables the checks for NFC tags,
you could just as well use Emuiibo directly on the Switch to emulate the tags.

I would do that but it doesn't work completely so I'll need to rely on tags until it fixes its issues.

 

[The Real Jdbye]

Hi!

I am using Tagmo for creating amiibos. I would like to overwrite an already written nfc tag. Is this possible? If yes,how? I can't write tag on a nfc chip that already has a written tag. I can restore the tag using "Allow restore to different tag", but the switch doesn't recognice any change. Beside this I don't see any other option.

So is there a way to do this?

Thank you

NFC tags aren't rewritable. The exception is the Datel PowerTags but those use their own writer and aren't compatible with Tagmo anyways.

 

[Jayro]

So, technically the reason why you can't re-use NFC tags is that Nintendo checks for a "read-only" flag that must be set before it'll accept an amiibo. If this flag is not set it rejects the data. So amiibo writers need to set this read-only flag to create a functioning amiibo NFC tag. If you wanted to, someone could make an IPS patch for the NFC service to remove that read-only flag check. Then you could make NFC tags that don't have the read-only flag set and they would work on your Switch and you could re-write to them. But they'd only work on Switches that had this patch.

This is genius, and needs to be merged into the master branch of Atmosphere.