Murata Electronics North America 5811M Manual Do Utilizador

 

© 2003 Cirronet

 Incorporated 

18 

M-5811-0008 Rev -

 

 

 

 

The WIT5811 is configured and controlled through a series of commands.  These commands 
are sent to the modem directly when the modem is in Control Mode when the modem is in 
Data Mode if the escape sequence is enabled.  The command syntax is the same for either 
method, a one- or two-letter command followed by one or more parameters.  The modem 
will respond with a two-byte message that indicates the new modem parameter value.  The 
commands are loosely grouped into five different categories: Serial commands, Network 
commands, Protocol commands, Status commands and Memory commands.  Each command 
is described in detail below.  In the descriptions, brackets ([,]) are used to denote a set of 
optional arguments.  Vertical slashes (|) separate selections.  For example, given the string 

, some legal commands are 

, 

, 

 and 

.  Most commands which set 

a parameter also have a 

 option which causes the modem to respond with the current 

parameter setting, e.g., 

Each modem command must be followed by either a carriage 

return or a line feed. 
 

 
These commands affect the serial interface between the modem and the host.  The default 
settings are 115,200 bps and protocol mode 0. 

 

Command Description 
sd[?|01|0f] 

Set Data Rate Divisor 
 

Data Rate    Divisor (hex) 

 115200 

bps 

= 0f (default) 

 

921600 bps =  01 

sp[?|00|03] 

Set Protocol Mode (currently only mode 3 is working) 
 

00  

=  point-to-point transparent mode 

 

 

 

03  

=  command, data and connection notification 

 

 

 

Set Data Rate Divisor 
Sets the serial bit rate between the modem and the host.  This command takes effect 
immediately and will require adjusting the host serial rate to agree.   

 

Set Protocol Mode 
Enables the base station to operate in a multipoint network.  Depending on the user 
application, more or less acknowledgment may be desired by the application.  Remotes can 
operate in transparent mode even though the base station is operating in one of the 
nontransparent modes.   

 

When using a protocol mode, make sure to count in packet overhead when calculating 
network performance.  Refer to the section on Protocol Modes for details on each format.