RFID read write doc

0x05: RFID_Protect

Enable (lock) or disable (unlock) the tag’s password protection.

Input: Mode (1 byte), 0x00 to unlock, 0x01 to lock

Output: Status byte (1 byte)

Example:

SEROUT RFID_TX, Baud, ["!RW", RFID_Protect, 1] ' Lock the tag

SERIN RFID_RX, Baud, [err] ' Get status byte

Note: When the tag is locked, a successful login using the RFID_Login command is required before you

can enable/disable password protection, change the tag’s password, or read/write to the tag. If the tag is

locked and you are not successfully logged in, the RFID_Read command will return four bytes of 0x00 in

place of the actual user data and the RFID_Write command will return an error.

0x06: RFID_Reset

Log out and reset the tag.

Input: None

Output: Status byte (1 byte)

Example:

SEROUT RFID_TX, Baud, ["!RW", RFID_Reset] ' Reset the tag

SERIN RFID_RX, Baud, [err] ' Get status byte

Note: All user data will remain stored on the tag. You will need to re-login using RFID_Login if you want

to access a locked tag after calling this command. You can also reset the tag by removing it from the

proximity of the RFID Read/Write Module.

0x0F: RFID_ReadLegacy

Read the 40-bit unique serial number from an EM Microelectronics EM4100 read-only tag (used with

Parallax’s RFID Card Reader Serial, #28140, and USB, #28340).

Input: None

Output: Header (1 byte) + data (10 bytes) + footer (1 byte)

Example:

SEROUT RFID_TX, Baud, ["!RW", RFID_ReadLegacy] ' Read EM4100 unique serial #

SERIN RFID_RX, Baud, [header, STR data\10, footer] ' Get header, data, and footer

Note: The header and footer are used to identify that a correct string has been received from the

reader (they correspond to a line feed and carriage return characters, respectively). The middle ten bytes

are the tag's unique ID sent in a printable ASCII string. For example, for a tag with a valid ID of

0F0184F07A, the following bytes would be sent: 0x0A, 0x30, 0x46, 0x30, 0x31, 0x38, 0x34, 0x46, 0x30,

0x37, 0x41, 0x0D.