Learn how to build an ESP32 Interactive Voice Response System that works offline. Call a number, press keys, control appliances. Full circuit, code & block diagram.
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Build an ESP32 Interactive Voice Response System Using GeoLinker
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ESP32-CAM Attendance System with WhatsApp Alerts
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Step-by-step ESP32-CAM attendance system tutorial with OLED display, rotary encoder, and WhatsApp notifications using CircuitDigest Cloud. Includes wiring, full source code, and FAQs.
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How ESP32-CAM Email Alert: Capture & Send Images on Motion Detection
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Build an ESP32-CAM email alert system that captures images on motion detection and sends them to your inbox via CircuitDigest Cloud , no SMTP, no subscription required.
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ESP32 Cam Capture Image and Send Email in Real-Time
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ESP32 Cam Capture Images and Send Emails in Real-Time with WiFi, OLED Display, and Push Buttons for Secure IoT Photo Alerts.
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ESP32 Bluetooth Jammer with NRF24L01 – DIY Build Guide
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Build a dual NRF24L01 ESP32 Bluetooth jammer from scratch. Full circuit diagram, pin connections, firmware flashing & video demo. Educational RF project for makers & engineers.
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SU-03T Offline Voice Recognition Module Setup Guide
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Build an offline voice recognition system using the low-cost SU-03T module. Full wiring, SDK setup & firmware flash guide. The SU-03T is the cheapest alternative to the VC-02 offline voice module
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ESP32-CAM WhatsApp: Send Images Instantly via IoT
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Learn how to build an ESP32-CAM WhatsApp system that captures and sends images in seconds using CircuitDigest Cloud API. No GSM needed. Full code, circuit diagram & GitHub included.
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DIY ESP32 Speaking Alarm Clock with AI Voice & Wi-Fi
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Build a smart ESP32 speaking alarm clock using XIAO ESP32-S3, Wit.ai TTS & MAX98357A. Announces time & custom messages aloud. Step-by-step wiring, code & web UI guide.
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Adding WiFi Camera to LiteWing ESP32 Drone – Guide
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Add a WiFi camera module to your LiteWing ESP32 drone for real-time aerial video streaming. Step-by-step wiring, mobile setup, and troubleshooting guide for hobbyists.
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ESP32-CAM Face Recognition Door Lock System using Solenoid Lock
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Learn how to build a Face ID-controlled digital door lock using ESP32-CAM, relay module, and solenoid lock. Step-by-step guide with circuit diagram, Arduino IDE setup, and full code for a secure IoT-based access system.
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