Iso14a.RequestLegacy

This command is deprecated. Do not use it in new code as we may remove it in the future!

This commands scans for ISO 14443-3 (Type A) compliant PICCs in the field of the antenna.

If the ReqAll parameter flag is set, both PICCs in idle state and PICCs in halt state will be switched to ready state. If this flag is not set, only PICCs in idle state will be switched to ready state.

Only PICCs in ready state may be selected via the Iso14a.Select command. This command may return the Iso14a.ErrCollision status code when executed successfully, in case two or more PICCs of different types are present in the HF field of the reader. In this case, the selection PICC procedure can be carried out normally with the Iso14a.Select command.

This command covers the commands REQA and WAKE-UP as specified by the ISO 14443-3 standard.

For new applications, the command Iso14a.Request should be used instead.

Properties

Command code: 0x1302
Command timeout: 100 ms
Possible status codes: General status codes, Iso14a.ErrNoTag , Iso14a.ErrCollision , Iso14a.ErrHf, Iso14a.ErrCom

Parameters (request frame)

Name		Type/Size	Description
-		Bit mask (8 bits)	-
	RFU	Integer (bit mask area 0xFE)	Zero padding
	ReqAll	Boolean (bit 0x01)	If enabled, all PICCs (even those in halt state) will be requested.

Returned values (response frame)

Name		Type/Size	Description
ATQA		Bit mask (16 bits)	Answer to request of type A (ATQA), according to the ISO 14443-3 standard.
	UIDSize	Enumeration (bit mask area 0xC000)	Length of "Unique IDentifier" (UID). The UID may be either a fixed number or a number generated randomly by the PICC (and therefore not unique!). Values: SingleSize (0x00) UID length of 4 Bytes. DoubleSize (0x01) UID length of 7 Bytes. TripleSize (0x02) UID length of 10 Bytes.
	RFU	Integer (bit 0x2000)	Zero padding
	Coll	Integer (bit mask area 0x1F00)	If any bit set, a collision occurred
	RFU	Integer (bit mask area 0x00F0)	Zero padding
	ProprietaryCoding	Integer (bit mask area 0x000F)	Proprietary coding.