About Telnet
The ESP has a raw tcp server that can be used to execute commands. It called Telnet even it is not a real telnet protocol.
It behaves like serial port, you can send commands ending by \n and receive the response.
The raw tcp protocol does not support any authentication, but if authentication is enabled, you must use any ESPXXX command with appropriate password to authenticate the connection during the first connection. Other commands will be executed only after the authentication is done. You won't need to authenticate again for additional commands until you disconnect.
Settings
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The Telnet server is enabled by default and listen on port 23. Be sure
#define TELNET_FEATUREis defined in configuration.h -
You can configure the Telnet following settings:
| Name | Description | Method |
|---|---|---|
| Enable Telnet | Enable or disable the Telnet server | WebUI or ESP command |
| Telnet port | The port used by the Telnet server | WebUI or ESP command |
| Telnet user password | User level password | WebUI or ESP command |
| Telnet admin password | Admin level password | WebUI or ESP command |
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You can also disable the welcome message that is displayed when the client connects to the Telnet server if it cause any issue with your client application.
In configuration.h just uncomment the following line to enable the Telnet server:
#define DISABLE_TELNET_WELCOME_MESSAGE
