Aim

To build an IoT project that senses the environment and communicates data to a dashboard.

Requirements

• Hardware / Simulation Tools:

  • Arduino Uno (real or in Tinkercad)

  • Wi-Fi module (ESP8266) if using real hardware

  • Temperature sensor (DHT11/DHT22) or Soil Moisture Sensor

  • Blynk app / IoT dashboard / Tinkercad Circuits

Steps

Step 1: Choose Your Sensor

• If using Temperature Sensor (DHT11/DHT22): Measures temperature and humidity.

• If using Soil Moisture Sensor: Detects dryness or wetness of soil.

Step 2: Connect Sensor to Arduino

• Temperature Sensor Wiring:

  • VCC → 5V

  • GND → GND

  • Signal → Arduino pin (e.g., A0 or D2 depending on sensor type)

• Soil Moisture Sensor Wiring:

  • VCC → 5V

  • GND → GND

  • Analog Output → Arduino analog pin (A0)

Step 3: Link Arduino to IoT Dashboard

• Open Blynk app (or IoT dashboard in Tinkercad).

• Add a widget (Gauge/Value Display) to see live sensor data.

• Add notification widget for alerts.

Step 4: Write the Program

• Program Arduino to read sensor values.

• Add if-else logic:

  • If temperature > 30°C → send alert message (“It’s hot!”).

  • If soil is dry → turn ON pump icon in dashboard.

  • Otherwise → keep pump OFF / show “All good.”

Step 5: Run the Simulation

• Start the circuit or real Arduino.

• Change conditions:

  • Increase temperature in simulation.

  • Reduce soil moisture value.

• Observe results on dashboard.

Step 6: Reflect

• Notice how data moves from the real world → sensor → Arduino → IoT dashboard → user action.

• This is how modern smart farms, smart homes, and industries work.