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Build a Motion-Triggered SMS Alert System with...
Imagine your basement door opens while you're away - within seconds, your phone buzzes with an SMS alert. That's exactly what this project Send SMS Alert using Seeed Studio XIAO ESP32 delivers, using the Seeed Studio XIAO ESP32 S3, an HC-SR04 ultrasonic sensor, and a free cloud SMS API from Circuit Digest Cloud. What makes this approach simple is the absence of GSM hardware. Traditional SMS projects needed SIM cards and bulky GSM shields. Here, the ESP32's built-in Wi-Fi does all the heavy lifti
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