HTTP request methods for IoT (GET, POST, PUT) in IOT Protocols - Step-by-Step Execution

Process Flow - HTTP request methods for IoT (GET, POST, PUT)

Start IoT Device

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Choose HTTP Method

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Request Data

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Receive Response

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End

The IoT device starts and chooses an HTTP method: GET to request data, POST to send new data, or PUT to update existing data. Each sends a request and waits for a response.

Execution Sample

IOT Protocols

GET /sensor/temp
POST /sensor/data {"value":22}
PUT /sensor/config {"mode":"auto"}

Three HTTP requests from an IoT device: GET to read temperature, POST to send sensor data, PUT to update sensor configuration.

Process Table

Step	HTTP Method	Request Sent	Server Action	Response Received
1	GET	GET /sensor/temp	Server returns current temperature	200 OK {"temp":21}
2	POST	POST /sensor/data {"value":22}	Server stores new sensor data	201 Created
3	PUT	PUT /sensor/config {"mode":"auto"}	Server updates sensor config	200 OK
4	END	-	-	All requests completed

💡 All HTTP requests processed and responses received

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	Final
Request	-	GET /sensor/temp	POST /sensor/data {"value":22}	PUT /sensor/config {"mode":"auto"}	-
Response	-	200 OK {"temp":21}	201 Created	200 OK	-
Server State	Initial	Temperature sent	Data stored	Config updated	Updated

Key Moments - 2 Insights

Why does the GET request receive data but POST and PUT do not?

GET requests data from the server, so the response includes data (see Step 1). POST sends new data, and PUT updates data, so their responses confirm success without returning data (Steps 2 and 3).

What is the difference between POST and PUT in these requests?

POST adds new data to the server (Step 2), while PUT updates existing data (Step 3). This is why POST returns '201 Created' and PUT returns '200 OK'.

Visual Quiz - 3 Questions

Look at the execution table, what response does the GET request receive?

A 201 Created

B 200 OK {"temp":21}

C 404 Not Found

D 500 Internal Server Error

💡 Hint

Check Step 1 in the execution_table under 'Response Received'

At which step does the server update the sensor configuration?

A Step 3

B Step 1

C Step 2

D Step 4

💡 Hint

Look at the 'Server Action' column in the execution_table

If the POST request sent different data, how would the response change?

A Response would be '404 Not Found'

B Response would be '200 OK'

C Response would still be '201 Created'

D Response would be '500 Internal Server Error'

💡 Hint

POST confirms data creation with '201 Created' regardless of data content (see Step 2)

Concept Snapshot

HTTP methods for IoT:
GET: Request data from server, receives data in response.
POST: Send new data to server, response confirms creation.
PUT: Update existing data on server, response confirms update.
Each method has a specific role in IoT communication.

Full Transcript

This visual execution shows how an IoT device uses HTTP methods GET, POST, and PUT. First, the device sends a GET request to read temperature data, and the server responds with the current temperature. Next, the device sends a POST request with new sensor data; the server stores it and confirms creation. Then, the device sends a PUT request to update sensor configuration; the server updates and confirms success. The execution table tracks each step's request, server action, and response. Variables like Request, Response, and Server State change accordingly. Key moments clarify why GET returns data while POST and PUT confirm actions, and the difference between POST and PUT. The quiz tests understanding of responses and server updates. This helps beginners see how IoT devices communicate using HTTP methods step-by-step.