Build a Real-World CoAP Server on ESP32 — Constrained IoT Communication, Ready to Deploy

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

You'll build a fully functional CoAP (Constrained Application Protocol) server on the ESP32 that exposes live sensor readings — temperature, humidity, and barometric pressure — through light-weight GET and PUT resources. This is the same approach used in smart agriculture, industrial monitoring, and edge computing scenarios where bandwidth and power are tight. Instead of wrestling with separate part orders, you unpack one box and start building a protocol stack that matters.

What You'll Build

An ESP32-based CoAP server that responds to GET requests with real-time DHT22 and BMP280 data, and accepts PUT requests to update resource states. The 0.96-inch OLED shows your endpoint URIs and latest sensor values locally, so you can see the server working even without a network client. By the end, you have a reference implementation that speaks the same lightweight protocol used in large-scale IoT deployments.

What You'll Learn

• Set up and configure the CoAP protocol stack on ESP32 using libcoap or microcoap
• Create RESTful resources (GET for sensor data, PUT for controllable parameters) with minimal payload overhead
• Integrate DHT22 and BMP280 sensors via I2C and one-wire interfaces, handling timing and calibration
• Debug constrained network exchanges using serial monitor and OLED display, preparing for real-world IoT networking

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

This kit is ideal for CBSE Class 11-12 students tackling IoT networking in their computer science electives, B.Tech ECE/EEE undergraduates exploring CoAP for constrained devices, and Smart India Hackathon participants needing a reliable sensor server node. ATL Tinkering Lab mentors and NIT/IIT/VIT engineering students will find the protocol implementation directly applicable to embedded systems coursework and capstone projects.

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.