Why do some phones have static UID and some do not? Is this chipset related? That depends on the chipset and the implementation of the NFC stack. As far as I’m aware of, there are three different scenarios used by various Android NFC devices: The device has a secure element and uses the static UID … Read more
If you root your phone, you can modify the file. The file contains the list of signatures and package names that are allowed access to the Secure Element (SE). The signatures is a hex-encoded X.509 certificate. To create one, simply include the tag <debug /> in the file and it will print to logcat the … Read more
I beleive All handsets with Android Kitkat, having NFC, supports HCE. Based on above, here is the list returned by gsmarena – currently 77 handsets. Top 70 out of 77 ————————— Samsung Galaxy S5 LG G3 Sony Xperia Z2 Samsung Galaxy Note 3 Samsung I9500 Galaxy S4 HTC Desire 816 HTC One (M8) Sony Xperia … Read more
Your GPO command seems to have quite a lot of issues: 80 A8 0000 01 00000001 000000001000 823DDE7A 1240 0 ^^ ^^^^^ ^^^^^^^^ ^^^^ ^^ 4. 1. 2. 3. 5. First of all, your GPO command sends several data bytes without context. You need to wrap your data items into a PDOL related data object: … Read more
The authentication keys and the access conditions for each sector of a MIFARE card are located in the last block of that sector (the sector trailer). You can update this block with new access conditions and authentication keys using a regular write command. The sector trailer looks like this: +—————————–+————–+—-+—————————–+ | 0 | 1 | … Read more
That depends on what type of tag you use and what level of protection against cloning you want. NFC tags (as defined by the NFC Forum) have no protection against cloning. Such tags are intended as containers for freely readable data (so called NDEF messages). Anyone could read an NDEF message from one tag and … Read more
The PWD_AUTH command that you send to the tag does not make much sense. The idea of the PWD_AUTH command is that you send your password (a 4-byte value) and that the tag responds with its password acknowledge (PACK) value (a 2-byte value) if you authenticated with the correct password. You can then verify the … Read more
It’s not possible programatically without rooting device. But you can start NFC Settings Activity by intent action Settings.ACTION_NFC_SETTINGS for api level 16 and above. For api < 16 use Settings.ACTION_WIRELESS_SETTINGS Previous selected answer suggests to use WIFI_SETTINGS but we can directly move to NFC_SETTINGS Here’s the example : android.nfc.NfcAdapter mNfcAdapter= android.nfc.NfcAdapter.getDefaultAdapter(v.getContext()); if (!mNfcAdapter.isEnabled()) { AlertDialog.Builder … Read more
If you want your app to be started by your tag and want to receive the parsed NDEF message, your tag should contain the following: An NDEF record that you want to filter upon as the first record of the NDEF message (you can only create intent-filters for the very first NDEF record on an … Read more
I would ignore what the Google documentation says for reading at https://developer.android.com/guide/topics/connectivity/nfc/nfc and for read/write at https://developer.android.com/guide/topics/connectivity/nfc/advanced-nfc#read-write as this provides a very poor user experience for writing to Tags and leads to a lot of failed writes because of user behaviour. To get reliable writing to NFC with Android you should use the newer and … Read more