Iso14a.Request

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

Properties

Command code: 0x1307
Command timeout: 100 ms
Possible status codes: General status codes, Iso14a.ErrNoTag , 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	Raw data (length 2 Bytes)	Answer to request of type A (ATQA), according to the ISO 14443-3 standard.
Collision	Boolean (8 bits)	True if a Collision was detected.