WI-MOD-9-D
Radio Modem
User Manual v1.9
WI-MOD-9-D
Manual
v 1.9
Page
44
Controlled Mode Link Check and Reset times
If the master module has not sent or received a radio message within a preset time, it will send a
check message to make sure that the link is still active. If it does not receive a response from the
slave unit, it will disconnect the link and reset DCD. The check time can be configured using the
ATS6 command. For example, ATS6=10 sets the check time to 10 sec.
If the slave module does not receive a radio message within the link reset time, it will disconnect
the link and reset its DCD. The link reset time can be configured using the AT\T command. For
example, AT\T12 sets the link reset time to 12 seconds. The link reset time should be larger than
the link check time.
Note that any module can be master or slave - the master module for a specific link is the
module which initiated the connection (by ATD).
The default for both of these parameters is 0 which disables the link check and link reset
function.
Configuration of Flow Control
CTS/RTS flow control can be configured. This may be desirable to ensure data is not lost if
transmitting large amounts of data.
AT&K
&K0
(default) Flow Control Disabled. CTS Always high. Module ignores host’s
RTS. Select for full duplex RS232 with no flow control.
&K1
not used
&K2
not used
&K3
CTS/RTS Flow Control. CTS Reflects the state of the local buffer. Module
only transmits serial data when RTS is high.
&K4
RS-485 Control - flow control disabled. Must be selected for RS-485 to work.
CTS is high. CTS goes low when transmitting data. RTS is ignored.
Configuration of Error-checking
Error-checking is normally disabled for transparent mode, and normally enabled for controlled
mode. The configurations for transparent and controlled modes above follows this convention.
However you are able to override this.
AT&E CRC Error Checking
&E0
Disable CRC Error Checking (default)
&E1
Enable CRC Error Checking
View Configuration
The AT&V command will output to the terminal a listing of all configuration settings.
AT&V
Show all settings including S registers
&V0
Same as AT&V
