Bluetooth Temperature Monitor Kit: ESP32 + DHT22 – Send Live Readings to Your Phone

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

Imagine building a gadget that reads the room temperature and beams it to your phone every second—without wires. This kit lets you do exactly that, even if you’ve never written a line of code. Using an ESP32 and a DHT22 sensor, you’ll create a battery-less BLE thermometer that updates a free phone app in real time. It’s a hands-on entry into the Internet of Things that feels like magic but teaches real engineering.

What You'll Build

You’ll assemble a breadboard circuit where the DHT22 captures temperature and the ESP32 transmits it over Bluetooth Low Energy. Two LEDs blink to confirm data transmission. On your phone, a serial terminal app will display the temperature readings scrolling live, updated every second. It’s a working wireless sensor node you can showcase or extend for science exhibitions.

What You'll Learn

• Read digital temperature data from a DHT22 sensor using Arduino IDE
• Program an ESP32 to broadcast data over BLE without prior coding knowledge
• Connect components on a solderless breadboard and understand basic circuit wiring
• Use a mobile serial terminal app to receive and display sensor values

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Perfect for ATL Tinkering Lab students, CBSE Class 6-10 learners dipping into electronics, and young hobbyists curious about wireless tech. Parents looking for a weekend STEM project with their 8-year-old will find the instructions clear and jargon-free. Even B.Tech first-year students can use it to grasp BLE fundamentals without soldering.

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.