DIY ESP32 Interactive Voice Response System

Learn how to create an ESP32 Interactive Voice Response System that allows remote device control using simple GSM phone calls.

Read more: https://circuitdigest.com/microcontroller-projects/esp32-interactive-voice-response-system-using-geolinker

Powered by the GeoLinker GL868 and SIM868 module, this project uses DTMF tones, voice prompts, and relay outputs to automate appliances without Wi-Fi or cloud connectivity, making it perfect for reliable offline automation and monitoring systems.

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