Uploaded May 2026 | Updated September 2026, 2 weeks ago

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In this project we build an ESP32 IVRS using SIM868 GSM to control devices via phone call and DTMF tones — no internet required. Includes circuit, code, and block diagram.

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

#ivrs #circuitdigest #gsm #geolinker #esp32 #tutorial
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