In this section, we will try to build a simple IoT application for sending data from a DHT-12 temperature and humidity sensor to a receiver device, using a Raspberry Pi hub and the HTTP protocol:
Data flow from a DHT-12 sensor to a receiver
Offering a variety of usage options, HTTP is one of most popular protocols on the web. Every time you open a website or run a mobile application, it is most likely the HTTP protocol you are using.
In the following table, you can find a more detailed description of the protocol to understand whether it is suitable for your needs:
|
Key |
Value |
|
Open source |
Yes |
|
OSI layer |
Application |
|
Data types |
Text, HTML, script, style, font, JSON, XML, stream, binary |
|
Limitations |
Not suitable for large amounts of binary data |
|
Possible operations |
Send/receive data |
|
Latency |
Low |
|
Usage... |