ThingMagic M5e-Compact - Manual (Page 178)

Get Application Commands
178 Command Set
Get User GPIO Inputs (66h)
The Get User GPIO Inputs command returns the status of the User Input GPIO lines:
The status of the GPIO lines is returned.
Note
The GPI lines are level sensed and not edge sensed. When Get User GPIO
Inputs is called it will respond with the signal level (high or low) on the line at
that moment.
Get Current Region (67h)
The Get Current Region command gets the current regulatory region set for the reader.
Currently available region codes are shown in the following table. Details on the
Regulatory Compliance for each region can be found in
Regional Support :
:
FF 00 66 1D 69
SOH Length OpCode CRC
FF 02 66 00 00 00 01 CA B2
SOH Length OpCode Status Input #1 Input #2 CRC