i plan to get high quality stuff if all this research goes well. I want a LED with it but i need to keep these for now because one from the US would be twice as expensive where i live.
i simply write a youtube link to open a video in the blue tag and it kept opening the gate, i changed the video to plain text and it also kept opening the gate. I can open the gate and pass the tag on the cell phone to open a video at the same time.
As long as all the systems you need to unlock use the same code or uid, your good to go
In my case
My safe, my workplace, my apt all use different codes
So I needed multiple chips, this is what I wanted you to understand before getting into it
It’s also important to point out. The ntag216 you have, cannot change it’s code or uid… it’s permanent… you can only change the data in it, but it’s uid stays constant
Uid and payload are different
The payload would be the YouTube link you’ve written in ndef
So if you are not capable of having new tags added to the system, those implants will not work
got it. so, thats what i meant with having both ntag216 and a mifare, i think i would be able to interact with most of the systems right? i dont care for low frequencies, only 13MH
about the payloads, i can write different things in each sector or something like that? maybe both my documents number and a link to linkedin or something? or it will always be a single code that can be only readed all at once? then i would need a whole script for sending more than a command to a phone for example?
For example, you could have 3 url links and a phone number
When scanned it will spit out all 4 things to a phone at the same time, assuming the reading phone supports all written ndef data
(Some phones limit what it will read)
Mifare is significantly more common for access control but it’s not compatible with all phones.
Give NFC Tools a try, it allows you to write multiple NDEF records to one tag. But keep in mind that Android will only open the first record by default unless this record is in good old plain text.
Interesting, IPhone will hit me with multiple notifications of all accepted ndef… I suppose that’s one better thing for iPhone, making up for the decreased ndef formats
i definitely will, but what about the arduino reader? is it better? whats the diference? i see some advanced functions on NFC tools to write in the memory adress. could i hack into its UID if i really focus in it?
You cannot change the UID on an NTAG216 no matter how hard you try.
The Arduino reader can be used with an Arduino to read a chip. There are several well known Arduino RFID readers, without knowing which model you have we can’t give you specifics.
i found out about the nfc tasks, i can make my phone go all brightness and all volume up at the same tap but i cant open a youtube video with it too. Is it possible to make some personalized code that would command the phone to do both at same time?