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FingerVein Online
Installation and Programming Manual
Page
51 of 69
9.5.22. Optical Barrier Status
Function: If the path of the optical barrier is blocked for some time or there is
interference from an external light source, this is communicated through OpCode
0
x4B.
When the situation returns to normal, the same OpCode with Arg =
0
x0D indicates this.
See
and the explanation of the
CFG-UI_OPT_T_WATCHDOG
byte for
9.5.23. Enable optical barrier
Function: Enables the detection LED of the optical barrier This command can be used to
allow for biometric identification simply by placing a finger on the sensor.
The optical barrier is self-managed by default; therefore this instruction is useful to:
• Activate biometric identification after reading a proximity card.
• Force the fast recovery of the optical barrier after a biometric identification (the
normal recovery time is set using the
CFG-UI_OPT_T_GUARD
Byte of the
Event
OP
0x4B
NA
0x01
ARG
Status code of the optical barrier
0x0D: Back to normal
0xED: Interference or blocking of the optical barrier
Instruction
OP
0x4A
NA
0x0000
ARG
None
Response
OP
0x4A
NA
0x0001
ARG
Status of the optical barrier