Build a Wireless Temperature Reporter with Arduino Uno, HC-05 Bluetooth, and DHT11

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

See live temperature and humidity readings appear on your phone screen every second without a single cable connecting the two. This kit combines an Arduino Uno, DHT11 sensor, and HC-05 Bluetooth module into a working wireless reporter — a first taste of the Internet of Things that runs entirely in your room. Whether you want to monitor a terrarium, a baby's room, or just understand how wireless sensor networks work, you will have a fully functional prototype in one afternoon.

What You'll Build

You will assemble a circuit that reads temperature and humidity from the DHT11, then streams those values over Bluetooth to the free Serial Bluetooth Terminal app on any Android phone. Two onboard LEDs flash to confirm power and data transmission, so you can see the system working even without the app. The final build is a compact breadboard device powered by a 9V battery, ready to sit anywhere you need environmental monitoring.

What You'll Learn

• How to wire a digital sensor to an Arduino and read environmental data
• Configuring an HC-05 Bluetooth module as a wireless serial link
• Writing Arduino code that sends formatted sensor data every second
• Using a smartphone app to receive and display live IoT data

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for the curious beginner, this kit fits CBSE Class 11-12 students exploring IoT concepts in their curriculum, B.Tech ECE/EEE first-years tackling sensor labs, and ATL Tinkering Lab mentors looking for a ready-to-run wireless project. It is equally at home on a hobbyist's desk as it is in a Smart India Hackathon practice session at a college like VIT or BITS.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.