ESP8266 as MQTT Broker | How to Setup Basic MQTT Broker in NodeMCU ESP8266 using sMQTTBroker Library

2 months ago

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Transcript

00:00Hi everyone and

00:02Welcome in this video. We will see ESP8266 as an MQTT broker

00:07So if you have a NodeMCU or also you can say ESP8266 and you want to use that board as MQTT broker

00:15Then how you can use it?

00:16So instead of using Mosquitto MQTT broker, Hive MQTT broker or EMQX broker or Nano MQTT broker

00:23You can use your NodeMCU board as an MQTT broker. So that thing we are going to cover in this video

00:29So we are going to use SMQTT broker library to create MQTT broker in the ESP8266 board

00:36I have ESP8266 board connected with my system and we will see how you can program your ESP8266

00:43To work as a MQTT broker. So let me show you the diagram

00:47So here we have our ESP8266 board in the center working as MQTT broker

00:53So any of your MQTT client can connect with that ESP8266 MQTT broker and they can exchange the data

01:00Now our ESP8266 board will connect with the Wi-Fi

01:03Okay

01:04And your Python MQTT client, NodeMQTT client connect with the same Wi-Fi and they can exchange data

01:10Using this ESP8266 MQTT broker. So I hope the diagram or the basic detail is clear

01:17Now let's move to the Arduino IDE and let's see SMQTT broker is installed in my system or not

01:23So here is the Arduino IDE and here I'm going to check that SMQTT broker is installed or not

01:29So yes, we have the SMQTT broker in my system. Okay, and

01:34NodeMCU is already connected with my system. So I am going to the example. Okay, and in the example

01:40We will search for SMQTT folder

01:43Okay here you can see SMQTT folder and I'm going to select the simple MQTT broker

01:49Example, so we will click here and we will open our simple MQTT broker example

01:54Okay, so here is our example now if you want to use this example

01:59Then you have to change two things first your Wi-Fi SSID and second your Wi-Fi password

02:04So if you want to use your NodeMCU board as MQTT broker

02:08Then first of all, we will connect our NodeMCU board with the Wi-Fi

02:12So other client can connect with the same Wi-Fi and they can use our ESP8266 as MQTT broker

02:19So first of all, we have to make connection with the Wi-Fi and then we can you know run the MQTT broker inside it

02:26So this is the entire code. Okay

02:28So in this code it will first connect with the Wi-Fi and then it will run the MQTT broker on the port number

02:351883 if you want to change the port then you can change the port number here and you can change your MQTT broker port

02:42From 1883 to any other TCP port number. Okay

02:47Now I'm going to provide my Wi-Fi SSID and the password and then we will upload this sketch into my NodeMCU board

02:54Okay, I have changed my Wi-Fi SSID and password and here is the MQTT broker port number

02:59So what I'm going to do is I am just going to upload this sketch into my NodeMCU board as you can see it is

03:05Already selected here

03:16Okay, so we have successfully uploaded our sketch into our ESP8266 board and here is the serial monitor

03:23I'm going to press the reset button on my NodeMCU

03:27And

03:29Here you can see the IP address. Okay, so this is the IP address of my NodeMCU board

03:33And we can use this IP address and 1883 port to connect with this NodeMCU MQTT broker

03:40So I can open my MQTT Explorer software. Okay, which is MQTT client software

03:47so I'm going to add new connection and it's my NodeMCU and

03:53The IP address of my NodeMCU is 192.168.1.9

03:58I am going to provide it here and here is the port number 1883, which is default in this example

04:04Okay, 1883. So I'm going to leave it as it is

04:07We will save it. Okay, and we will click on connect and here you can see we are connected

04:12Also, I'm going to again open the MQTT Explorer as my second MQTT client

04:17Okay, and here is our

04:21Connection. Okay. I'm going to change the client ID here. Okay, and then I'm going to connect

04:27So we are connected. Okay, our both the client is connected with our NodeMCU MQTT broker

04:34So basically we have uploaded the sketch into our NodeMCU board and then after it will

04:39Started acting as an MQTT broker. So I have this MQTT Explorer software in my system

04:45So I have opened two instance of this software and both instance are connected with ESP8266 board

04:52Okay, and now they are ready to exchange the data. So if I publish some data to any topic

04:59Okay, then on the second client we are able to receive that data

05:03So second second client is a subscriber. Now. The first client is the publisher now

05:08Now we can use our second client as a publisher

05:11so we are going to select the test topic and then we will publish some data from this second client and

05:16Our first client will receive that data. So our first client will act as a subscriber and our second client will act as a

05:23Publisher. Okay. So now you can use your

05:28NodeMCU board as an MQTT broker with n number of MQTT client and then you can exchange the data

05:34So if you are working in the home automation

05:36Or if you want to read any sensor data via Wi-Fi in your mobile phone in your tablet in your laptop or in your desktop

05:42Then you can use your ESP8266 board as an MQTT broker. Okay, it can be your central MQTT broker to

05:51Exchange the data. Okay. So this is how you can use your NodeMCU board as an MQTT broker

05:56So all you have to do is you just have to install this SMQTT broker library in your Arduino IDE

06:02then after you have to launch the

06:06Simple MQTT broker code from SMQTT broker folder in the examples

06:11okay, so simple MQTT broker code and then after you have to change few things and the few things is your Wi-Fi SSID and

06:18the Wi-Fi password to connect your

06:21ESP8266 board with the Wi-Fi and then after it will start acting as a

06:27MQTT broker and then after you can use it. Okay

06:30So, I hope this thing is clear and if you still have any questions or any doubt in this

06:35Okay, then you can always ping me on telegram Instagram. What's up anywhere? Also, you can comment on this video

06:40Also, you can send me a mail

06:42Now in the future videos, we are going to see how to set up secure MQTT broker in the NodeMCU

06:48Okay, so right now in this code, we don't have any username and password

06:53So when we try to connect with this broker, okay, we haven't specified any username and password

06:59Okay without specifying any username and password we are able to connect with that MQTT broker

07:04Which is running inside ESP8266, but we want to make a secure MQTT broker

07:09Then how we can do that? So that thing we are going to cover in the next video

07:13Okay, so stay tuned for the next video till then take care

07:18goodbye, and

07:20Thank you

ESP8266 as MQTT Broker | How to Setup Basic MQTT Broker in NodeMCU ESP8266 using sMQTTBroker Library

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