ESP32 HVAC Monitor Kit — an intermediate-level kit for teens.

ESP32 HVAC Sensor Network Kit - Monitor Temperature and Humidity Across Multiple Zones with Node-RED

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 1-5 days.

Monitor temperature and humidity across five rooms, server racks, or HVAC zones-all from a single live dashboard. This kit provides everything required to assemble a wireless sensor network that publishes readings to a local MQTT broker and visualizes them in Node-RED. Ideal for facility managers, engineering students, and home automation enthusiasts.

What You'll Build

You'll create a fully functioning 5-node sensor network. Each ESP32 reads temperature and humidity from its DHT22, with three nodes also capturing barometric pressure via BMP280. All data streams to a Mosquitto broker running on your laptop or Raspberry Pi, and a Node-RED dashboard displays the readings in real time. The result is a centralized monitoring panel that you can access from any device on the network.

What You'll Learn

• Deploy and configure an MQTT broker for reliable IoT communication
• Program ESP32 microcontrollers to read DHT22 and BMP280 sensors over I2C and one-wire interfaces
• Design a multi-node wireless sensor mesh using publish-subscribe messaging
• Build an interactive Node-RED dashboard that visualizes live temperature, humidity, and pressure trends

Kit Contents