JavaScript MQTT client

What you will learn here about JavaScript MQTT client:

  • JavaScript MQTT Publisher client
  • JavaScript MQTT Subscriber client

JavaScript MQTT client is implemented by using MQTT Websockets. If you want to know how to implement MQTT Websockets please click on the below link to know, how to implement MQTT WebSockets on windows, how to implement MQTT WebSockets on raspberry pi, how to implement MQTT WebSockets on Linux and how to implement MQTT WebSockets on Google cloud.

MQTT WebSocket

Javascript MQTT Publisher client

Assuming you have successfully implemented MQTT Websockets on your system (Windows or Linux or raspberry pi or Google cloud etc ). Please follow the following steps to use javascript as MQTT publisher client.

1)Please download the below javascript MQTT publish or publisher example code.
JavaScript MQTT publisher example code (4 downloads)

2)Extract the downloaded zip code.

3)If you want to modify or Edit code. Please open downloaded code with any editor and modify the following things which is shown below.
Javascript MQTT client code

4)Now please double click on downloaded code.

5)Now here we will use the windows command prompt as MQTT Subscriber to see published data which is shown below. If you do not know how to use the Windows command prompt as MQTT Subscriber then please click on the below link.

Windows Command prompt as Publisher and Subscriber
Windows command prompt as mqtt subscriber

6)Now please enter values and click on the post which is shown below
Javascript MQTT publish example

7)Now Check windows command prompt to see received data which is shown below.
Windows command prompt as mqtt Subscriber

JavaScript MQTT Subscriber client

Assuming you have successfully implemented MQTT Websockets on your system (Windows or Linux or raspberry pi or Google cloud etc ). Please follow the following steps to use javascript as MQTT publisher client.
1)Please download the below javascript MQTT subscribe or subscriber example code.
JavaScript MQTT Subscriber example code (4 downloads)

2)Extract the downloaded zip code.

3)If you want to modify or Edit code. Please open downloaded code with any editor and modify the following things which is shown below.
Javascript MQTT client code

4)Now please double click on downloaded code.

5)Once you double click on downloaded code. you will see nothing in the browser.
Javascript MQTT client code

6)Now here we will use the windows command prompt as MQTT publisher to publish data which is shown below. If you do not know how to use the Windows command prompt as MQTT Subscriber then please click on the below link.

Windows Command prompt as Publisher and Subscriber
windows command prompt as MQTT publish example

7)Now, please check the browser to see published data which is shown below.
javascript as mqtt subscriber example

You can also use the following MQTT clients to publish and subscribe to data.

Python as Publisher and Subscriber

ESP8266 as MQTT publisher and subscriber

 

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