MagTek DynaPro Mini Programmer's99875629 - Manual (Page 114)

Appendix J - BLE Module Control Data
DynaPro Mini| PIN Encryption Device | Programmer’s Reference (Commands)
Page 114
Request message
Byte 0
0 (Request message type)
Byte 1 5 (Command identifier)
Byte 2 (hex) 55 (Secure code 1)
Byte 3 (hex) AA (Secure code 2)
Response message
Byte 0
1 (Response message type)
Byte 1 Response code
Example command:
Request message (hex): 00 05 55 AA
Response message (hex): 01 00