Any clues on why I am not able to sniff the new tag when it interacts with the box?
Not sure. Sorry. I haven’t had a chance to circle back to this yet. I’ll try to find some time this weekend.
You’re fine, I didn’t know if it possibly was something with the new tag or what. I appreciate all the help! Not as worried now that I have a box that works 
Typically when nothing turns up but we expect to see something something is out of alignment. Sometimes the proxmark can be too close, for example.
So, let’s take a look at the configs:
hf 15 raw -ac -d 00a0020000 // area 1 config
hf 15 raw -ac -d 00a0020001 // area 1 end
hf 15 raw -ac -d 00a0020100 // area 2 config
hf 15 raw -ac -d 00a002f300 // tamper detection -- i don't expect this to be used
hf 15 raw -ac -d 00a002ff00 // lock config
hf 15 raw -ac -d 00230010 // read user memory blocks 00 - 10 (16)
Also, let’s try to have the proxmark sim the old one. Align the proxmark the old tray’s tag for the first of the following commands.
hf 15 dump
hf 15 eload -f <filename.bin of dump from previous command>
hf 15 sim
Now present the proxmark to the litter box’s reader. When you’re done, press the button on the side.
trace list -t 15
I appreciate the info! I’m sorry for the delay, had some family issues come up.
I will test things out at some point and get back to you.
It could be user error, but I keep getting “Command failed” when attempting any of the “hf 15 raw -ac -d “ commands. I tried both options one with just “hf 15 raw -ac -d 00a0020000, as well as, everything.
I also tested the the old tag, attaching what I got.
hf 15 raw -ac -d 00a0020000
Like that?
Yes, like that.
Again, sorry for the delay in posts. Life has really just been kicking me while I am down 
Oof. Sorry to hear that.
What are the versions you see when you enter the proxmark client?
Also, can you try a “hf tune” and position the tag such that graph pulls down the most and then try those commands again?