Build Your Own Telegram IoT Bot: ESP32 + DHT22 Relay Controller Kit

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

Send a message to your Telegram bot and watch a relay click on, or ask the bot for the current temperature and humidity—all in seconds. This kit gives you everything to turn an ESP32 into a responsive IoT hub that listens to your chat commands and reports DHT22 sensor readings back as chat replies. You’ll understand how devices can communicate over the internet without a public web server, using the Telegram Bot API as a secure bridge.

What You'll Build

You’ll assemble a Telegram-controlled IoT hub on a breadboard that toggles a 5V relay and returns accurate temperature and humidity on demand. One simple command can switch a light or fan; another instantly fetches environmental data. The system runs on the ESP32, connects to your home WiFi, and stays online listening for messages—giving you a powerful remote control tool you can carry in your phone.

What You'll Learn

• Connect ESP32 to WiFi and the Telegram Bot API using Arduino IDE
• Read digital sensor data from DHT22 and format it into chat-ready messages
• Control a 5V relay module through GPIO pins based on incoming Telegram commands
• Implement bot polling, error handling and message parsing in C++

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Perfect for B.Tech ECE/EEE students building IoT prototypes, CBSE Class 11-12 students with basic Arduino or ESP32 experience, and Smart India Hackathon teams needing a reliable Telegram-controlled sensor station. Makers at ATL Tinkering Labs will find it an ideal intermediate step into connected devices, while hobbyists at IIT, NIT, VIT or BITS can quickly prototype remote automation ideas.

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.