@TomHarkness I followed your advice here and ran “lf t55xx p1detect” - and got a positive read response. I then ran " lf t55xx write b 0 d 00148041 p AA55BBBB" and checked with “lf search u”, receiving back the following:
Checking for Unknown tags:
Possible Auto Correlation of 1 repeating samples
Using Clock:64, Invert:0, Bits Found:625
ASK/Manchester - Clock: 64 - Decoded bitstream:
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010110100101101
0100111010101010
1010110010101010
1010101010110100
1010111111111111
1111111111111111
1111111111111111
Unknown ASK Modulated and Manchester encoded Tag Found!
if it does not look right it could instead be ASK/Biphase - try ‘data rawdemod ab’
Valid T55xx Chip Found
Attempting to read my xEM now comes up with nothing, which I’m assuming is good news?