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

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.