Build a 5-Node Wireless Sensor Network with Software Defined Radio — Raspberry Pi 4 + RTL-SDR + Arduino DHT22 Transmitters

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

Ever wondered how weather stations transmit data wirelessly across kilometers? This kit lets you build five Arduino Nano sensor nodes that measure temperature and humidity with DHT22, encode data into FSK (Frequency Shift Keying) signals, and transmit on the 433 MHz ISM band. The Raspberry Pi 4, equipped with an RTL-SDR dongle and a custom antenna, captures these signals and decodes the telemetry — giving you a complete, real-time sensor network dashboard.

What You'll Build

You will assemble five remote sensor nodes on prototype PCBs, program the Arduinos to read DHT22 sensors and modulate FSK data, and set up a Raspberry Pi base station that runs an RTL-SDR receiver and a Python-based decoder. The final system displays temperature and humidity from all nodes in a web interface, demonstrating a practical wide-area monitoring solution for agriculture, campus, or industrial environments.

What You'll Learn

• Designing and soldering 433MHz transmitter circuits with component tolerances
• Implementing FSK modulation on Arduino for digital data over RF
• Using RTL-SDR on Linux to capture and demodulate raw I/Q samples
• Writing a decoder in Python (or GNU Radio) to extract sensor readings from multiple transmitters

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is designed for advanced makers, electronics engineering students (B.Tech ECE/EEE final‑year projects), and IoT professionals preparing for competitions like Smart India Hackathon. If you have prior experience with Arduino and basic Linux, you'll gain deep insight into software‑defined radio, spread‑spectrum communication, and networked sensor systems. It's ideal for ATL Tinkering Lab mentors looking to demonstrate real‑world RF applications.

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.

Choose your assembly option:

• Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
• Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.