Wiznet makers

1.Project 

Integrate microcoap library to RP2040-HAT-FREERTOS-C project.

link : https://github.com/1248/microcoap

2.Microcoap

Microcoap is a lightweight CoAP library designed to provide basic CoAP functionality in resource-constrained environments.

Standard Library vs Lightweight Library 

Standard Coap library

• Ex) libcoap, coap.net etc...
• Advantage  
  • Rich features: Provides advanced features such as block transfer, observation, and security (DTLS).
  • Scalability: Suitable for complex applications requiring a wide range of CoAP functions.
• Weakness
  • Resource Requirements: Consume more memory and CPU resources, which can be inefficient in limited resource environments such as RP2040.
     

Lightweight Coap Library

• Ex) microcoap, nanocoap, smcp etc...
• Advantage  
  • Lightweight: Very low memory and CPU usage.
  • Simple integration: Small and simple code base for quick and easy integration.
• Weakness
  • Limited features: Basic CoAP message processing only. No advanced features (block transfer, security, etc.).

3.Example Code

4.How to use

Download libcoap

lilnk : https://github.com/obgm/libcoap

$ cmake -E remove_directory build
$ cmake -E make_directory build
$ cd build
$ cmake .. -DENABLE_DOCS=OFF -DDTLS_BACKEND=openssl
$ cmake --build .
$ cd Debug

Load program to Pico Board

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