esp32-tunnel — Arduino library + examples
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Install in Arduino IDE
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1. Sketch → Include Library → Add .ZIP Library
2. Pick this zip (or the inner esp32-tunnel folder zipped if your IDE asks)
3. Also install from Library Manager: ESPAsyncWebServer, AsyncTCP, espfetch

Open an example
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File → Examples → esp32-tunnel → SelfHosted

Then set:
  tunnelToken("nt_YOUR_API_TOKEN");
  tunnelSetup(SELFHOST, "YOUR_HOST/your-slug", "visitor-secret");

Public call:
  http://YOUR_HOST/your-slug/api/data?key=visitor-secret
