Reprogramming the DT-xEM for use with HID readers

Recently started a new job, large building and every door locked with HID RFID readers and everyone has a RFID keycard around their neck to open the doors.

I already had the Dangerous Things xEM ATA5577 microchip in my left arm (EM400 emulation) but I bought an unwritten ATA5577 chip from

I did the initial tests on the cyberize chip, still in the packaging and when I got that working I decided to try to write it to my DT chip.

While the standard readers managed to read both chips very well the keypad readers had a very hard time reading the chip, even though it wasn’t even inside me. read more