Monitor HVAC Performance Wirelessly with Arduino Uno & NRF24L01

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

With two Arduino Uno boards and NRF24L01 radio modules, you’ll build a wireless temperature and humidity monitoring system. Place the sensor-equipped transmitter in a room, duct, or near an AC vent and read real-time values on the LCD receiver — perfect for diagnosing air conditioner performance, checking ventilation efficiency, or logging data for a school science project. This project introduces you to IoT fundamentals and wireless communication without the complexity of Wi-Fi or Bluetooth.

What You'll Build

You’ll assemble a remote sensor node that sends temperature and humidity data every second to a base station. The base station displays the readings on a 16x2 LCD, so you can monitor HVAC performance without running wires. You’ll also learn to power both units with 9V batteries, making it truly portable for field measurements.

What You'll Learn

• Wiring and configuring NRF24L01 wireless modules for reliable 2.4GHz communication.
• Calibrating the DHT22 digital sensor for accurate temperature and humidity measurements.
• Using I2C backpack to drive a 16x2 LCD with minimal Arduino pins.
• Designing a wireless sensor network protocol, including packet structure and error handling.

Kit Contents

HVAC — Two Arduinos with NRF24L01 radio send DHT22 readings wirelessly to LCD.

What's in this kit

• Arduino Uno R3 x2
• NRF24L01 x2
• DHT22
• 16x2 LCD
• I2C Backpack
• 100nF Caps x10
• 10µF Caps x4
• 10kΩ Resistors x5
• 400-pt Breadboard x2
• M-M Wires x30
• 9V Battery Snap x2