esp32-telnet

A telnet implementation for:

• The platform espressif32
• Framework espidf
• example board esp32doit-devkit-v1
• Visual Studio Code - PlatformIO

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This implementation/example shows the use and implementation of telnet for esp32 idf environment.

There are 2 example implementations:

• A sendonly example, sending a string every second to all connected telnet applications
• An echo example, echoing all send characters from connected telnet applications

Example telnet applications I used are Putty (Windows) and ConnectBot (Android)

Configurations:

• Wifi_Config.h => This implementation does not have a WifiManager, so you need to input your WIFI credentials in this file
• Telnet_Config.h
  • TELNET_EXAMPLE_SEND_ONLY
    • Will enable the send only example
    • Disabling this define will enable the echo example
  • TELNET_MAX_SOCKET
    • Defines the maximum telnet connections to be active at the same time (e.g. 5 means max 5 applications connected)

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Development links:

• https://platformio.org/
• https://docs.platformio.org/en/latest/platforms/espressif32.html

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Thanks to:

• https://github.com/romix123/P1-wifi-gateway
• https://github.com/bartwo/esp32_p1meter
• https://github.com/daniel-jong/esp8266_p1meter

And the insights of:

• https://github.com/espressif/esp-idf/blob/master/examples/protocols/sockets/tcp_server/main
• https://github.com/espressif/esp-idf/blob/master/examples/protocols/sockets/tcp_server/main
• https://esp32.com/viewtopic.php?t=911