Guide to Card Number storage:
cardnum = (R+(r*32767)), convert to hex
Guide to log keys and data:
* A=alarm armed (# level)
* a=added user (# usernum)
* C=keypad command (# command)
* c=second half
* c=checked user (0=failed, #=found usernum)
* D=denied access (# card num)
* d=second half
* d=deleted user (# usernum)
* E=second (#=second)
* F=priv fail (0=wrong pw, 1=too many attempts, 2=not logged in)
* f=second half
* f=card fail (#=usermask)
* G=granted access (# card num)
* g=second half of card
* H=hour (#=hour)
* i=attempt to write to invalid eeprom address (# usernum)
* I=attempt to delete from invalid eeprom address (# usernum)
* L=locked (1=door1, 2=door2, 3=bedtime)
* M=minute (#=minute)
* m=alarm state (# level)
* R=read tag (# card num)
* r=second half of tag
* Q=superuser authed (#=superuser)
* S=auth (0=privileged mode enabled)
* s=alarm sensor (# zone)
* t=alarm trained (#=sensor value)
* T=alarm triggered (0)
* U=unlocked door (1=door1, 2=door2, # card num)
* u=second half of card
* Z=user db cleared (0)
* z=log cleared (0)