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BIS V-6107 TCP/IP, USB
Processor unit
95
9
Protocol
Command ID 'r': Read RSSI
►
This command returns the RSSI (Receive Signal Strength Indicator) which is determined for
the selected R/W head.
Real-Time RSSI
Returns the actual, current RSSI value
Pilot Tone RSSI
Returns the RSSI value of the pilot tone
Data RSSI
Returns the RSSI value of the requested tag data. First a data carrier must
be selected using the
Select
command.
Tip
The RSSI is a value which is proportional to the signal strength of the received res-
ponse signal from the data carrier.
Byte
Length
Command element
Value range
00
1
Command ID (ASCII)
'r'
01
1
Head number (ASCII)
'1'…'4'
02
1
RSSI Type (ASCII)
'0': Real-Time RSSI
'1': Pilot Tone RSSI
'2': Data RSSI
03
1
BCC
00
hex
…FF
hex
Acknowledgment:
Byte
Length
Command element
Value range
00
1
Status
<ACK> or <NAK>
01
1
Status number
See Status Num-
ber table
The reply then follows
Byte
Length
Command element
Value range
00
1
Control command
<STX>
After errorless reading the data are sent.
Byte
Length
Command element
Value range
00
1
Status
<ACK>
01
1
Head number (ASCII)
'1'…'4'
02
1
I-value (ASCII) high byte
'0'…'9'
…
…
…
'0'…'9'
04
1
I-value (ASCII) low byte
'0'…'9'
06
1
Q-value (ASCII) high byte
'0'…'9'
…
…
…
'0'…'9'
07
1
Q-value (ASCII) low byte
'0'…'9'
08
1
BCC
00
hex
…FF
hex
Summary of Contents for BIS V-6107
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