nfcTag (Variable type)

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Properties specific to nfcTag variables
Main remarks
Reinitializing the variable
List of functions that use the nfcTag variables

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nfcTag (Variable type)

In french: nfcTag

The nfcTag type is used to define the advanced characteristics of an NFC tag (Near Field Communication). The characteristics of this NFC Tag can be defined and modified using various WLanguage properties.

Note: For more details on the declaration of this type of variable and the use of WLanguage properties, see Declaring a variable.

Example

// Ecrit une URL dans un tag NFC
tag is nfcTag
url is nfcData
url.Type = nfcURI
url.Content = "www.pcsoft.com"
Add(tag.Data, url)
NFCWriteTag(tag)
IF ErrorOccurred THEN
	Error("Echec de l'écriture sur le tag NFC.", ErrorInfo())
END

tag is nfcTag = NFCReadTag()
IDTag is string = StringFormat(BufferToHexa(tag.Identifier), ...
				ccUpCase + ccIgnorePunctuationAndSpace)

Properties

Properties specific to nfcTag variables

The following properties can be used to handle an NFC tag:

Property name	Type used	Effect

Data	Array of nfcData	Array containing: the data read in an NFC tag (after a call to NFCReadTag). the data to write into an NFC tag (after a call to NFCWriteTag).
Identifier	Binary buffer	Identifier of the NFC tag (corresponds to "hardware identifier" of a badged tag). This identifier is automatically filled after a read operation. This property is available in read-only. This information is not available.
MaxSize	Integer	Maximum size (in bytes) of the data that can be stored in the NFC tag. This property is automatically filled after a read operation. This property is available in read-only. This property is not available.
ReadOnly	Boolean	True if the tag is read-only, False if it is not protected in write mode. During a read operation, this property is automatically filled. During a write operation, if the ReadOnly property is set to True, the tag will be automatically write-protected: it will no longer be possible to modify its data.. This operation is irreversible. Some NFC tags do not support this mode. For more details, see the help about NFCWriteTag. This property always corresponds to True. Indeed, only the read operation is managed.
Type	Integer constant	Type of tag corresponding to one of the following values: nfcUnknown unknown type. Default value if no read operation was performed with the tag. nfcMifareClassic: NFC Mifare Classic nfcType1 NFC Forum Type 1 nfcType2 NFC Forum Type 2 nfcType3 NFC Forum Type 3 nfcType4 NFC Forum Type 4 The type of tag is automatically filled after a read operation. This property is available in read-only. This property is not available.

Remarks

Main remarks

The NFC functions support the tags corresponding to the standardized types 1 to 4 defined by the NFC Forum (http://www.nfc-forum.org/specs/spec_list/) and they can only read and write data encoded to the NDEF format (NFC Data Exchange Service).
The NFC functions cannot be used in the simulator or in the emulator.

Only the read operation is managed.

Reinitializing the variable

You can use VariableReset to reset the content of a variable of type nfcTag.

List of functions that use the nfcTag variables


NFCReadTag	Starts reading an NFC tag or enables the detection of NFC tags for the current window.
NFCSendTag	Sends an NFC tag to another device.
NFCWriteTag	Starts writing data to an NFC tag.