OG_MU-4-434_v10e Circuit Design, Inc.
46
OPERATION GUIDE
5.4.2.14 @RT Relay route designation
Sets the route information in the route register. Setting is possible up to a maximum of 10 relay stations. When
entering the route information, enter the Equipment IDs (EI) of the relay stations in the order of the relay. Specify
the Equipment ID (EI) of the target station at the end. For details of data transmission using relay stations, refer to
the DT command.
Default: NA
The response corresponding to the @RT command is *RT = NA
Value: NA or (00h – FEh),......,(00h-FE) A maximum number of 10 units can be specified
However, 00h is for broadcast communication, while setting NA disables the route information in the route register
and enables the ID set with the @DI command.
Example: Set route information for transmitting ‘ABC’ from the source station with Equipment ID = 5F via relay
station IDs 01, 02 and 03 to target station Equipment ID = 8F.
Control command:
@RT
01,02,03,8F
C
R
L
F
Control response: *
RT
=
01,02,03,8F
C
R
L
F
Hint: When only one Equipment ID is entered in the RT command, that becomes the direct target station.
5.4.2.15 @SB UART stop bit setting
Sets the UART stop bit of the MU-4. The change of setting is applied immediately after the response to the
command is returned. Change the stop bit on the control side immediately.
Default: 01
Value: 01 = Stop bit 1
02 = Stop bit 2
Example: Change to Stop bit 1
Control command:
@SB
01
C
R
L
F
Control response: *
SB
=
01
C
R
L
F
5.4.2.16 @SI Mode setting with RF received signal level information
Sets whether or not to include the RF received signal level information (RSSI) of the received packet data in the
data receive at the source station or the ACK response and receive response at the source station. To include the
information, set the mode to ON. The information is attached to the front of the data receive (‘*DS’). With OF, the
data receive is ‘*DR’. This mode is applied to all commands which involve a receiving operation at the source
station or target station. However with data transmit command 3, RSSI information is always added to the data
receive character string or AKC response character string.
Default: OF
Value
ON: Attach RSSI information
OF: No RSSI information
Example 1: Attach RSSI information mode setting
Control command:
@SI ON
C
R
L
F
Control response: *SI = ON
C
R
L
F
Example 2: Appearance of the target station data receive and source station ACK response
Target station data receive
when the RSSI of the received packet data is -85 dBm = 55 hex
• When the data transmit command 2 is issued from the source station
When SI = ON, RI = OF
*DS = 55 03 ABC
C
R
L
F
When SI = ON, RI = ON
*DS = 55 03 ABC /R 20,01,02,03
C
R
L
F
When SI = OF, RI = OF
*DR = 03 ABC
C
R
L
F
When SI = OF, RI = ON
*DR = 03 ABC /R 20,01,02,03
C
R
L
F
Source station ACK response
when the RSSI of the ACK response received from the target station is -70 dBm=46 hex
• When the data transmit command 2 is issued from the source station
When SI = OF
*DR = 00
C
R
L
F
When SI = ON
*DS
= 46 00
C
R
L
F
