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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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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DIY WiFi-Controlled Drone with ESP32 and Arduino
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Learn how to build a WiFi-controlled drone using ESP32 modules and MPU6050 IMU. This DIY project offers stability control, smartphone control, and easy upgradability. Get step-by-step instructions and a complete circuit diagram.
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How to send whatsapp message from ESP32?Easy and Free API for WhatsApp
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Send real-time WhatsApp alerts from ESP32 using WiFi and CircuitDigest Cloud. Trigger notifications from sensors without GSM modules, SIM cards, or complex hardware using the free API from CircuitDigest Cloud
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How to send Email from ESP32 for sensor monitoring and status updates
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ESP32 distance monitoring system using an ultrasonic sensor and WiFi to send real-time email alerts via Circuit Digest Cloud API when objects cross safety limits.
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ESP32-C3 Text to Speech Online Using AI: Wit.ai API Full Guide
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Build ESP32-C3 text to speech using AI API and the WitAITTS Arduino library. Full wiring, code, and troubleshooting guide for natural voice output.
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ESP32 Drone with Loudspeaker: Build Guide
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Build a Litewing ESP32 drone with a loudspeaker using Bluetooth Stream real-time announcements, voice alerts & audio from the air. No coding needed. Full wiring guide
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ESP32 Text to Speech Using AI: Wit.ai TTS Library Guide
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Complete ESP32 text to speech using AI guide. Learn ESP32 TTS library setup, circuit wiring, code examples for voice-enabled IoT projects with MAX98357A amplifier.
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ESP32 CAM Currency Recognition: Edge AI Arduino Tutorial
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Master ESP32 CAM currency recognition with our Arduino guide. Step-by-step: Edge Impulse training, circuit setup, code deployment for Indian note detection.
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SMS Alert System with Seeed Studio XIAO ESP32 & HC-SR04 Sensor
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Build a WiFi-based SMS alert system using Seeed Studio XIAO ESP32 and HC-SR04 sensor. Send real-time notifications via free API—no GSM module needed. Complete tutorial with code.
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Interfacing Raspberry Pi Pico RTC DS3231 : Easy Setup Guide & Code
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Learn to interface the Raspberry Pi Pico RTC DS3231 using Arduino IDE. Build an accurate digital clock with 16x2 I²C LCD. Includes circuit diagram, code & troubleshooting.
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Smart Energy Meter Using IoT with MQTT Dashboard & Alerts
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Build an IoT-based smart energy meter using ESP32 & PZEM-004T. Real-time monitoring via the MQTT dashboard, SMS alerts for abnormal conditions. Complete circuit & code included.
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