IoT / Lightweight Protocols
===========================

These protocols are optimized for constrained environments such as IoT devices, where low bandwidth, power, and processing capabilities are key considerations.

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   CoAP

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   * - Protocol
     - Description
     - Use Case
   * - CoAP (Constrained Application Protocol)
     - A lightweight protocol designed for use in resource-constrained environments.  
       Built over UDP and uses a RESTful model similar to HTTP, optimized for low overhead communication.
     - Sensor data collection, remote monitoring, and IoT applications.

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   .. tab-item:: CoAP

      **RFC:** RFC 7252

      **Main Features:**

      - Lightweight protocol optimized for constrained devices and networks
      - Based on REST architecture; uses HTTP-like methods (GET, POST, PUT, DELETE)
      - Operates over UDP (port 5683), supports multicast
      - Low overhead and efficient binary header format
      - Built-in reliability with retransmission and deduplication
      - DTLS support for secure communication

      **Use Cases:**

      - IoT sensor data collection and telemetry
      - Remote monitoring in constrained or battery-powered environments
      - Smart home or industrial control systems
      - Communication in LPWAN, 6LoWPAN, and other low-power networks

      **Alternative Protocols:**

      - MQTT – Lightweight publish-subscribe protocol over TCP
      - HTTP/HTTPS – RESTful communication in more capable devices
      - LwM2M – Device management built on top of CoAP
      - AMQP – Reliable messaging protocol for larger systems

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         :card: Learn More About CoAP


         **Let us learn more about CoAP:**

         * :ref:`Learnings in this section <CoAP_step1>`

         * :ref:`Terminology <CoAP_step2>`

         * :ref:`Version Info <CoAP_step3>`

         * :ref:`CoAP Version&RFC Details <CoAP_step5>`

         * :ref:`CoAP Basic Setup on Ubuntu using IPv4 <CoAP_step20>`

         * :ref:`CoAP Basic Setup on Ubuntu using IPv6 <CoAP_step21>`

         * :ref:`CoAP Protocol Packet Details <CoAP_step6>`

         * :ref:`CoAP Usecases <CoAP_step7>`

         * :ref:`CoAP Basic Features <CoAP_step8>`

         * :ref:`CoAP Feature : Lightweight Protocol <CoAP_step9>` 

         * :ref:`CoAP Feature : RESTful Architecture <CoAP_step10>`

         * :ref:`CoAP Feature : UDP Based Communication <CoAP_step11>`  

         * :ref:`CoAP Feature : Asynchronous Messaging <CoAP_step12>`  

         * :ref:`CoAP Feature : Bulit In Reliability <CoAP_step13>`

         * :ref:`CoAP Feature : Low Header Overhead <CoAP_step14>`

         * :ref:`CoAP Feature : Resource Discovery <CoAP_step15>`   

         * :ref:`CoAP Feature : Multicast Support <CoAP_step16>` 

         * :ref:`CoAP Feature : Observe Option <CoAP_step17>`

         * :ref:`CoAP Feature : Security Support <CoAP_step18>`

         * :ref:`Reference links <CoAP_step19>`

         
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            Jump to "CoAP"