N and V column

Column #120: You Can’t Touch That: Non-contact Access Control
The Nuts and Volts of BASIC Stamps (Volume 6) Page 75
' =========================================================================
'
' File....... RFID_Single.BS1
' Purpose.... Single-tag RFID Tag Reader
' Author..... Jon Williams, Parallax
' E-mail..... jwilliams@parallax.com
' Started....
' Updated.... 07 FEB 2005
'
' {$STAMP BS1}
' {$PBASIC 1.0}
'
' =========================================================================
' -----[ Program Description ]---------------------------------------------
'
' Looks for a specific RFID tag and when found, opens an electric lock
' -----[ Revision History ]------------------------------------------------
' -----[ I/O Definitions ]-------------------------------------------------
SYMBOL Enable = 0 ' low = reader on
SYMBOL RX = 1 ' serial from reader
SYMBOL Latch = 2 ' lock/latch control
' -----[ Constants ]-------------------------------------------------------
' -----[ Variables ]-------------------------------------------------------
' -----[ EEPROM Data ]-----------------------------------------------------
' -----[ Initialization ]--------------------------------------------------
Reset:
HIGH Enable ' turn of RFID reader
LOW Latch ' lock the door!
' -----[ Program Code ]----------------------------------------------------
Main:
LOW Enable ' activate the reader
SERIN RX, T2400, ($0A, "0F0184F20B") ' wait for header & tag