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ESP32Tutorials/ESP32-ESP-IDF-Send-SMS-with-Twilio
ESP32 ESP-IDF Send SMS with Twilio
A minimal ESP-IDF example that sends an SMS via Twilio's REST API from an ESP32. It connects to WiFi, makes an HTTPS POST to Twilio, and that's it. Useful as a starting point, not a library.
Uses ESP-IDF natively (not Arduino), so it fits into serious firmware projects without the Arduino abstraction overhead. Kconfig integration means credentials are configurable at build time rather than hardcoded. The WiFi connection is split into its own component, which is the right structure for ESP-IDF projects.
One star, three forks, last touched February 2023 — this is effectively abandoned. The README is a single line pointing to an external article; if that blog goes down, the repo is useless. No error handling visible — if the HTTP request fails or Twilio returns a 4xx, it almost certainly crashes or silently does nothing. Credentials in sdkconfig.old are a real risk of leaking API keys if someone commits without checking what sdkconfig.old contains.