Duration: May 2025
BIT (Blynk IoT ThingSpeak) is a smart home automation prototype built using an ESP32 microcontroller, the Blynk cloud platform for mobile-based device control, and ThingSpeak for real-time device status logging and visualization. It demonstrates remote switching of electronic appliances and live telemetry monitoring using simple HTTP APIs over Wi-Fi.
Easily adaptable for smart homes, energy-saving systems, and remote IoT control environments.
- Boot & Wi-Fi: ESP32 powers up and connects to a predefined Wi-Fi network.
- Blynk Cloud: It authenticates using a token and connects to the Blynk platform.
- Mobile App Commands: Commands are sent via Virtual Pins (V0–V2) through the Blynk app.
- Device Switching: GPIO23 controls a relay module to switch appliances ON/OFF.
- Status Logging: Real-time device state is pushed to ThingSpeak using HTTP GET requests for visualization and analytics.
| Component | Role |
|---|---|
| ESP32 | Wi-Fi MCU to control hardware |
| Blynk App + Cloud | Sends remote control commands |
| ThingSpeak | IoT dashboard for telemetry & logging |
| Relay Module | Controls external devices (e.g., bulbs) |
| HTTP API | Used for ThingSpeak data updates |
| Wi-Fi | For internet communication and control |
- Smart Home Appliance Control
- Remote IoT Device Switching
- Smart Energy Management
- IoT Data Logging for Performance/Health
- Cloud-based Device Monitoring Dashboards
- ESP32 Development Board
- Relay Module
- Wi-Fi-enabled environment
- Smartphone with Blynk App
- ThingSpeak Account
- Arduino CLI or Arduino IDE
- Blynk Library
- HTTPClient Library (for ThingSpeak API)
Watch the live demonstration of the BIT – Blynk IoT ThingSpeak project in action:
