Start/Stop Polling - Command 0x3002

After entering the Pass-Through Mode, the host use this command to request the device to start polling for a Type A and Type B PICC until it detects a PICC or times out. This command automatically turns on the RF Antenna.

After NFC Type A card is detected, the device will stop the polling, activate the card and

• Send a notification that identifies the ISO 14443 Type A (Supports ISO 14443-4 protocol). See Notification 0x0301 – Pass-Through Mode Information Update.

• Send another notification with the UID as a payload.

After NFC Type B card is detected, the device will stop the polling, activate the card and

• Send a notification that identifies the ISO 14443 Type B (Supports ISO 144443-4 Protocol). See Pass-Through Mode Information Update - Notification 0x0301

• Send another notification with the UID as a payload.

If the card is not supported, the device will send error notification and stop the polling.

Request Data for Command 0x3002 – Start/Stop Polling

Tag	Len	Value / Description	Typ	Req	Default
Beginning of any wrappers, at minimum including Request Message
3002 = Start/Top Polling - Command 0x3002
81	01	This parameter defines how long the device to poll for the PICC · 0x00 = No timeout · 0x01 to 0xFF = 1 to 255 seconds		R
82	01	Polling Mode · 0x00 = Stop Polling Mode. This mode can only be used when the device is in polling state. · 0x01 = Start Polling Mode	B	R
End of any wrappers, at minimum including Request Message

Response Data for Command 0x3002 – Start/Stop Polling

Tag	Len	Value / Description	Typ	Req	Default
Beginning of any wrappers, at minimum including Response Message
No parameters.
End of any wrappers, at minimum including Response Message

Request Example - Command 0x3002

Example (Hex)
A 00 81 04 01 A0 30 02 84 08 30 02 81 01 00 82 01 01

Response Example - Command 0x3002

Example (Hex)
AA 00 81 04 82 A0 30 02 82 04 01 00 00 00