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E103-W03 User Manual
cannot be used for applications where the web client and the web server frequently interact. The application of the
WebSocket function allows the E103-W03 module to pass the serial port. Real-time interaction with the web page saves
the GET and POST request process initiated by the HTTP client during multiple interactions, improves the response
speed, and the module side can actively push data to the web page. For details, see Chapter 7 WebSocket Configuration
Tutorial
5.4 Parameter configuration
There are 3 ways to configure parameters: serial port-based AT command configuration, UDP-based remote AT
configuration, and browser-based web page configuration. For detailed operation, see Chapter 6 AT Command
Description and Chapter 7 Tutorial.
5.4.1 Serial AT Configuration
When you need to use serial AT commands to configure parameters, first send "+++" to enter the AT mode, and then
operate according to the AT commands in Chapter 6. After the configuration is completed, some commands will take
effect immediately, and some commands will take effect after restarting, according to the AT command chapter. prevail.
To exit AT mode, send the command: AT+EXIT. Anytime sending "+++" command will enter AT mode. But AT+EXIT
can only be used in AT mode, otherwise it is used as transmission data.
5.4.2 UDP Remote Configuration
UDP remote configuration is the parameter configuration performed under the same network using network debugging
tools, which can also be called over-the-air configuration. There are two ways to enter into the remote configuration:
when the module is in AP mode, the PC is connected to the module; when the module is in STA mode, the PC and the
module are connected to the same router. The module will always listen to a fixed UDP port 8009. When the module and
the terminal are in the same network, the parameters can be configured by setting the corresponding IP and port. The
remote configuration must be in AP mode or STA mode and can only be performed after a network connection has been
established. This function is not supported in P2P mode.
5.4.3 Browser-based web configuration
The web configuration must ensure that the PC and the module are in the same local area network. There are two ways to
enter the web configuration: the module is in AP mode, and the PC is connected to the module; the module is in STA
mode, and the PC and the module are connected to a router. The PC accesses the IP address of the module through a
browser, and accesses a static web page for parameter configuration.
5.5 Status indication
Status indication is to display the working status of the module through serial port printing or pin output level status.
Serial port instruction: print "Entered AT mode" when entering the AT command, print "Exited AT mode" when exiting
the AT command, print "ERR=x" when the AT command is wrong, and return the set value if the AT command is correct.
The pin indication includes WiFi connection status indication, socket connection status indication and module abnormal
indication. When the WiFi connection is established, the W_LINK pin outputs a high level, and if the connection is
disconnected, the W_LINK pin outputs a low level. When the socket connection is established, S_LINK outputs a high
level, and if the connection is disconnected, S_LINK outputs a low level.
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