This IoT-based smart farming system monitors environmental conditions (temperature, humidity, light, rain, and water level) using various sensors and automatically controls appliances like a fan, sprinkler, LED light, and water pump. The system also sends real-time data and device statuses to a smartphone using the Blynk IoT platform, enabling efficient, remote, and automated farm management.
Price : 10000
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| Component | Quantity | Description |
|---|---|---|
| ESP32 Development Board | 1 | Core controller with Wi-Fi support |
| DHT11 Sensor | 1 | Measures temperature and humidity |
| Rain Sensor | 1 | Detects rainfall |
| LDR (Light Dependent Resistor) | 1 | Measures ambient light level |
| Water Level Sensor | 1 | Detects low/high water levels |
| Relay Module (4-channel) | 1 | Controls high-voltage devices like fan, pump |
| Fan (or DC motor) | 1 | Used for ventilation |
| Water Pump | 1 | Used for irrigation when water level is low |
| Sprinkler System | 1 | Activated based on humidity |
| LED Light | 1 | Lights up based on ambient light conditions |
| Blynk App (on smartphone) | 1 | Displays sensor data and device statuses |
| Breadboard + Jumper Wires | As needed | For connections |
| Power Supply | 1 | To power the ESP32 and connected devices |
Initialization & Wi-Fi Connection:
ESP32 connects to the Wi-Fi network and Blynk cloud.
Sensors and relay modules are initialized.
Sensor Readings:
DHT11: Reads temperature and humidity.
Rain Sensor: Detects presence of rain (digital output).
LDR: Measures light intensity (analog value).
Water Level Sensor: Checks if the water level is low (digital input).
Automation Logic:
Fan: Turns ON if temperature > 35°C.
Sprinkler: Turns ON if humidity < 50%.
LED Light: Turns ON in dark conditions (LDR value > threshold).
Water Pump: Turns ON if water level is LOW.
Blynk App Communication:
Sends real-time data to Blynk:
Virtual pin V1: Rain status.
Virtual pin V2: Temperature and humidity combined.
Virtual pin V3: LDR value.
Virtual pin V4: Water level status.
Virtual pins V5–V8: Device states (Fan, Sprinkler, LED, Pump).
Displays all sensor readings and allows remote monitoring.
Loop Delay:
1-second delay to avoid excessive sensor reads and Blynk updates.