HOWTO Program a key

RFID Tags

We use EM4100 125khz RFID tags.

There are three formats for the data in our flavour of RFID:

1 26 bit decimal number, just a number, written on keyfobs
2 16 bit decimal numbers, <5 digits>:<5 digits>, currently (2022-07-29) in the CRM and written on the cards.
the number but as hex It's what is in the spreadsheet right now.

Thanks to Evan for the blog post and Google Sheet documenting this!

To go from hex to decimal: echo 0x05094D8 | perl -nle 'print hex'
- 0x is optional
To go from 2 16 bit to decimal: echo 80:38104 | perl -laF/:/ -e 'print (($F[0] << 16) + $F[1])'
To go from decimal to 2 16 bit:echo 5280984 | perl -ne 'printf "%03d:%05d\n", $_ >> 16, $_ & 0xFFFF'
Decimal to hex: echo 5280984 | perl -nle 'printf "0x%X\n", $_'

Since April 2020 adding new keys and changing the status of existing ones is handled through a remote interface on McClellan.

mosquitto_sub -h 10.13.0.22 -v -t "#" | grep door

The current door code doesn't acknowledge new keys, so you're just looking to be sure the door is online.
Then test the key, and see if it says unknown user or not.
I *think* a key that is not programmed will act differently than a wrong pin but I'm not 100% sure if that's the current door firmware or mainline esp-rfid.

1. SSH into mcclellan

Look at the help: /opt/door-management/old-doors.sh -h

You're actually going to run something like /opt/door-management/old-doors.sh add <key> <name> <pin>

Please remember that if the name has a space to quote it so it's not two separate arguments.

Talk to Mtfurlan (talk) 19:48, 12 July 2022 (EDT)

Not currently supported, sorry.