HF Elfin-EG10, Руководство пользователя

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4G_2G DTU Products Function
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Enter the confirmation code
“
a
”
on the serial port. After receiving the
confirmation code, the module returns
“
+ok
”
to confirm and enter the command
mode.
Figure 30. Switching to Command Mode
<Notes>
：
When you enter "+++" and the confirmation code "a", the serial port is not echoed, as shown
in the figure above.
Entering "+++" and "a" needs to be completed within a certain period of time to reduce the
probability of entering the command mode by mistake during normal operation. Specific
requirements are as follows:
In the command mode, the module can be set or queried by the AT+ command under the
UART port, and the operation can be restarted, or the AT+ command can be used to return to the
transparent transmission mode. The AT+ instruction is detailed in the next section.
2.2. Send AT Command in Transparent Transmission Mode
After set AT+CMDPW command value, the module support response AT command for special data
format as
“”AT ”\r”, it is very useful for query some status in transparent
transmission mode. It saves the steps of changing to AT command mode.
The following example, we first set AT+CMDPW=HF, then send the following data in transparent
mode, and get the AT command response. This
data won’t be sent to socket.