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NFC v2.00 adds support for low level access to the NFC features. This allows reading and writing from NFC tags. The NFC library provides three features: - Reading Ndef tags based intent filters: Reading NDEF data from NFC tags - Sending data between two devices (Android Beam): https://www.b4x./#con
link: Please disregard, I followed the link above and have the correct libraries now.
link: Thank you, I am trying your example and it says "missing library reference for Tag Tech?"
link: Hello, I'm using this great lib to write an nfcv tag, calling transceive. My question is, while queueing many different calls (writes at different of

End If End If Private Sub TagTech_Connected (Success As Boolean) Log($"Connected: ${Success}"$) If Success = False Then toast.Show("Error connecting to tag") Log(LastException) Else WriteNdef(Array(nfc.CreateMimeRecord("text/plain", Ignore.Text.GetBytes("UTF8"

Starting from iOS 13 it is possible to write Ndef tags. NFCEx adds writing support to iNFC library. Before you start with writing, make sure to follow the "reading" tutorial and get the example working: https://www.b4x.com/android/forum/threads/nfc-reading-ndef-tags.84784/#post-536918 It requires s
link: You will need to build the payload yourself. There is no API for binary messages. Another option is to use base64 strings.
link: Thank you Erel, this works great for sending Text data, but how about sending Data in Bytes? Thanks, Walter
link: After a few days of banging my head against the table, I finally figured out how to send data to an NFC Tag in Bytes, I have modifed @Erel's NFCEx Cre

NFC library doesn't support writing. There are several other libraries that provide more features: https://www.b4x./?query=nfc+write&page=1&prefix=0

Dim techs As List = gnfc.GetTechList(intentstart) If gnfc_mode = 1 And techs.IndexOf("android.nfc.tech.Ndef") > -1 Then gnfctech.Initialize("NFCTag", "android.nfc.tech.Ndef" , intentstart) gnfctech.Connect els

Writing is now supported: https://www.b4x.-class-write-ndef-tags.110726/
link: The NFC library currently doesn't support writing.
link: Does B4i support the new changes that came with iOS13 for NFC writing and reading, i know there's already a library for reading, but if a library is w

The official NFC library doesn't support writing. I do plan to add support for writing in the near future. You can try this library: https://www.b4x.com/android/forum/threads/nfc-tagwriter-and-ibeacon-libraries-for-free.42137/#content
link: I already read that from you in the past days somewhere... Great news for sure! :-) I guess it will come with B4A 6? :D
link: I have been searching the forum all over and have not found answer. I am trying to communicate with nfcpy on my laptop and would like to use nfc writ
link: Thank you. I have tried that library, but can not get it to successfully "write" to my pc running nfcpy. I continue to get the error "tag must be in

if you exclude credit cards and id tags (for which there would be hundred of millions of examples), the most popular tag types are those that support ndef. ndef is a level of abstraction capable of supporting many tag types which recognize it. think of ndef as b4x; you code in b4x, and your app ca
link: I am starting to study a project that will use NFC tags, I would like to understand which models are among the most widespread I would therefore like

I want write plus record (type text) in a TAG I found this to work well Sub createTextNDEF(Text As String) As RSNFCRecord Dim lang As String = "en" Dim textBytes() As Byte = Text.GetBytes("UTF8") Dim langBytes() As Byte = lang.GetBytes("US-ASCII") Dim langLength As Int = langBytes.L

The NFC lib gives you the possibility to communicate with a NFC Tag. A specific Protocol (like the one you want to use) you need to implement by yourself.
link: Hello Everyone, I need to read and write Mifare 1K tag. I currently be able to read UID of the tag, but in the NFC library I have not found nothing to

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