NfcManager.requestTechnology doesn't detect tags on IOS 14.4

[ChristopheBelpaire]

Hello, I'm trying to read tag with the following code : let resp = await NfcManager.requestTechnology([NfcTech.MifareIOS, NfcTech.Iso15693IOS, NfcTech.IsoDep, NfcTech.Ndef]); console.warn(resp); let tag = await NfcManager.getTag(); console.warn(tag); And they aren't detected. If I use : NfcManager.setEventListener(NfcEvents.DiscoverTag, tag => { console.log(tag)}) It works fine (my tags are ndef formated).

I need to use the request technology to get the UID of the tag. I also tried your react-native-nfc-rewriter app and I could use the "Read ndef" (witch use the setEventListener method) but the "Scan nfc tag" doesn't detect my tags.

All of my tags are readable with nxp tag info, and I can get the uids on this app.

Any idea ?

Thanks in advance!

[whitedogg13]

Hi @ChristopheBelpaire thanks for reporting.

I just find an issue maybe related to this, can you remove NfcTech.Ndef from requestTechnology and try again? The issue might be fixed by this workaround, and we can still get NDEF via getTag call, like this:

let resp = await NfcManager.requestTechnology([NfcTech.MifareIOS, NfcTech.Iso15693IOS, NfcTech.IsoDep]);
console.warn(resp);
let tag = await NfcManager.getTag();
console.warn(tag);

[ChristopheBelpaire]

Hello @whitedogg13 thanks for the answer. I tried your suggestion without success. Here is the tag info of my tag :

** TagInfo scan (version 4.24.7) 2021-02-01 09:40:54 **
Report Type: External

-- IC INFO ------------------------------

# IC manufacturer:
EM Microelectronic-Marin SA

# IC type:
Unknown IC implementing Iso 15693

# NFC Forum NDEF-enabled tag:
Unknown Type Tag

-- NDEF ------------------------------

# NFC data set information:
NDEF message containing 1 record
Current message size: 105 bytes
Maximum message size: 146 bytes
NFC data set access: Read & Write

# Record #1: URI record:
Type Name Format: NFC Forum well-known type
Short Record
type: "U"
protocol field: https://
URI field: cloud.genexir.selinko.com/j0U7Gcgr-zH1Z45G?uid=4BZ4ARAaXWU&token=AAJl&f=g&sig=fo9rG-ZDVmv9_jDUYODY9Q
Payload length: 101 bytes
Payload data:

[00] 04 63 6C 6F 75 64 2E 67 65 6E 65 78 69 72 2E 73 |.cloud.genexir.s|

[10] 65 6C 69 6E 6B 6F 2E 63 6F 6D 2F 6A 30 55 37 47 |elinko.com/j0U7G|

[20] 63 67 72 2D 7A 48 31 5A 34 35 47 3F 75 69 64 3D |cgr-zH1Z45G?uid=|

[30] 34 42 5A 34 41 52 41 61 58 57 55 26 74 6F 6B 65 |4BZ4ARAaXWU&toke|

[40] 6E 3D 41 41 4A 6C 26 66 3D 67 26 73 69 67 3D 66 |n=AAJl&f=g&sig=f|

[50] 6F 39 72 47 2D 5A 44 56 6D 76 39 5F 6A 44 55 59 |o9rG-ZDVmv9_jDUY|

[60] 4F 44 59 39 51                                  |ODY9Q           |

# NDEF message:
[00] D1 01 65 55 04 63 6C 6F 75 64 2E 67 65 6E 65 78 |..eU.cloud.genex|

[10] 69 72 2E 73 65 6C 69 6E 6B 6F 2E 63 6F 6D 2F 6A |ir.selinko.com/j|

[20] 30 55 37 47 63 67 72 2D 7A 48 31 5A 34 35 47 3F |0U7Gcgr-zH1Z45G?|

[30] 75 69 64 3D 34 42 5A 34 41 52 41 61 58 57 55 26 |uid=4BZ4ARAaXWU&|

[40] 74 6F 6B 65 6E 3D 41 41 4A 6C 26 66 3D 67 26 73 |token=AAJl&f=g&s|

[50] 69 67 3D 66 6F 39 72 47 2D 5A 44 56 6D 76 39 5F |ig=fo9rG-ZDVmv9_|

[60] 6A 44 55 59 4F 44 59 39 51                      |jDUYODY9Q       |

# NDEF Capability Container (CC):
Mapping version: 1.0
Maximum NDEF data size: 152 bytes
NDEF access: Read & Write
Supports Multiple Block Read
[0] E1 40 13 01                                     |.@..            |

-- EXTRA ------------------------------

# Memory size:
152 bytes
* 38 blocks, with 4 bytes per block

# IC detailed information:
Supported read commands:
* Single Block Read
* Multiple Block Read
* Get Multiple Block Security Status
* Get System Information
AFI supported
DSFID supported
IC reference value: 0x1E
Customer ID: 0x001

-- FULL SCAN ------------------------------

# Technologies supported:
ISO/IEC 15693-3 compatible
ISO/IEC 15693-2 compatible

# Android technology information:
Tag description:
* TAG: Tech [android.nfc.tech.NfcV, android.nfc.tech.Ndef]
* Maximum transceive length: 253 bytes

# Detailed protocol information:
ID: E0:16:78:01:10:1A:5D:65
AFI: 0x00
DSFID: 0x00

# Memory content:
[00] . E1 40 13 01 |.@..|
[01] . 03 69 D1 01 |.i..|
[02] . 65 55 04 63 |eU.c|
[03] . 6C 6F 75 64 |loud|
[04] . 2E 67 65 6E |.gen|
[05] . 65 78 69 72 |exir|
[06] . 2E 73 65 6C |.sel|
[07] . 69 6E 6B 6F |inko|
[08] . 2E 63 6F 6D |.com|
[09] . 2F 6A 30 55 |/j0U|
[0A] . 37 47 63 67 |7Gcg|
[0B] . 72 2D 7A 48 |r-zH|
[0C] . 31 5A 34 35 |1Z45|
[0D] . 47 3F 75 69 |G?ui|
[0E] . 64 3D 34 42 |d=4B|
[0F] . 5A 34 41 52 |Z4AR|
[10] . 41 61 58 57 |AaXW|
[11] . 55 26 74 6F |U&to|
[12] . 6B 65 6E 3D |ken=|
[13] . 41 41 4A 6C |AAJl|
[14] . 26 66 3D 67 |&f=g|
[15] . 26 73 69 67 |&sig|
[16] . 3D 66 6F 39 |=fo9|
[17] . 72 47 2D 5A |rG-Z|
[18] . 44 56 6D 76 |DVmv|
[19] . 39 5F 6A 44 |9_jD|
[1A] . 55 59 4F 44 |UYOD|
[1B] . 59 39 51 FE |Y9Q.|
[1C] . 00 00 00 00 |....|
[1D] . 00 00 00 00 |....|
[1E] . 00 00 00 00 |....|
[1F] . 00 00 00 00 |....|
[20] . 00 00 00 00 |....|
[21] . 00 00 00 00 |....|
[22] . 00 00 00 00 |....|
[23] . 00 00 00 00 |....|
[24] . 00 00 00 00 |....|
[25] . 00 00 00 00 |....|

  x:locked, .:unlocked

--------------------------------------

Any idea here I can debug the library in order to see where the tag not detected ?

Thanks in advance!

[MatteoAlberghini]

Hi, I have the same problem.

let resp = await NFCManager.requestTechnology([
  NfcTech.MifareIOS,
  NfcTech.Iso15693IOS,
  NfcTech.IsoDep,
  NfcTech.Ndef,
]);
console.log(resp);
return await NFCManager.getTag();

The tags are found on android, and I can send IsoDep commands to them (such as making auth and changing auth keys) using transceive. I'm using ntag 424 DNA: https://www.nxp.com/docs/en/data-sheet/NT4H2421Gx.pdf

[MatteoAlberghini]

I want to add to this issue: I solved the problem. In my instance, the problem was that I didn't specify NFC ISO 7816 application identifiers inside the .plist, as per this docs https://developer.apple.com/documentation/corenfc/nfciso7816tag . I found another problem though: If I run Request Techonology with IsoDep and Ndef I get a "React Native callback type only permits a single invocation from native code". I need to find only IsoDep tags so is no big deal, but might still be a problem for others.

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