AT Commands Reference Manual - wireless netcontrol GmbH

Chapter 4: Using the Commands
Test H24 Communication
This is a preliminary step. During this step, the ability to communicate with the H24 using AT
commands is tested.
Start
Error
Send 'AT'
No Echo
Check RS232 Connection or
Change UART Baud Rate
OK
End
Figure 4-3: Test H24 Communication
Communication example:
AT
ATE1
AT
OK
//By default, the echo should be enabled
//Confirm that H24 replies with OK
Basic Configuration
These are optional steps. If required, specific RS232 pin behavior can be selected. Extended error
notification is recommended for debugging and field-support purposes.
Configure the RS232 Connection (Optional)
Baud rate, line behavior and flow control
(for example, “AT+CBUAD=115200”, “AT&Cx”, “AT&Dx”, “AT&Kx”)
Note: If the baud rate has been changed, you must change the baud rate of the UART as
well.
Enable Extended Error Messages (Optional)
(for example, “AT+CMEE=2 or 1”)
Basic Commands (Optional)
Figure 4-4: Basic Configuration
April 15, 2010 H24 - AT Commands Reference Manual 4-3