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Whenever someone rings the doorbell I want to be notified. An ESP32 at the doorbell initiates a telnet connection with my dingdong server.

An ESP32 module is sleeping on my doorbell. Whenever the doorbell rings the ESP32 module awakens and initiates a telnet connection with my remote dingdong-server.
The dingdong-server is an ESP8266 Fritzelboard. This server will:
  1. power up the dingdong in my room, producing a pleasant very loud melodious sound
  2. do a lot of other important things