MQTT C# - Using MQTT with C# [Step By Step Tutorial For MQTT Integration] - M2MQTT C#

[@kuronek069]

if i subcribed to a list of topic, how could i know the topic which i received message

[@CodingDroplets]

e.Topic will give you the topic to which the message is delivered. You can use conditions to do various actions based on topics. Very good question.

[@kuronek069]

@@CodingDroplets thank you so much, it help me alot.

[@CodingDroplets]

Most welcome!!

[@zorzional]

@@CodingDroplets Thank you very much for the explanation. Can you give a simple code example?

[@zorzional]

I would like to put data in a textbox based on a topic in a list, can you help me?

[@thinleyjamtsho3158]

nice tutorial video, it helped me a lot.....thank you for sharing your knowledge

[@CodingDroplets]

Glad to hear that

[@CodingDroplets]

Hello everyone! Thanks for watching this video. We have started a new tutorial series on *.Net Blazor* . Check it out now: kzbin.info/aero/PLzewa6pjbr3IQEUfNiK2SROQC1NuKl6PV Follow on Twitter: twitter.com/codingdroplets

[@himalayaannabhurana6325]

i like your desktop wallpaper

[@CodingDroplets]

🙂

[@kitaekim9163]

Why "Properties\Resources.resx" could not be found. Does this error appear when I build?

[@CodingDroplets]

Thanks for checking out my video and leaving a comment. To answer your question, the "Properties\Resources.resx" file is typically automatically generated when you create a new WinForms application in Visual Studio, and it contains any resources (such as images or strings) that your application uses. If you're seeing an error message saying that the file could not be found, it's possible that the file was accidentally deleted or moved, or there may be a problem with your Visual Studio project file.

[@mantaemilian5029]

I made an application in xamarin forms with a mqtt broker installed on a raspberry pi. when I'm connected to the network with raspberry, everything works very well, but I can't configure it to be able to access it from another network. how can this be done? when I'm on the network I put the local IP, but to leave the network I don't know what to put on the server.

[@CodingDroplets]

Thank you for sharing your experience! To make your Xamarin Forms application with an MQTT broker accessible from another network, consider hosting your MQTT service in a public cloud.

[@edinetgrunhed6000]

sir how to modify the code if i use broker e.g. hivemq rathern than localhost?

[@CodingDroplets]

I haven't used it yet. But as of my limited knowledge, HiveMQ is providing its own client library.

[@mintheinwin4959]

Hello Sir, how to connect configuration instead of "127.0.0.1" if using with different computer for application1 and application2. Or how to check ip of mosquito mqtt.

[@CodingDroplets]

Thank you for your comment and for watching my video on MQTT integration with .NET C#! To connect to a Mosquitto MQTT broker running on a different computer, you will need to replace the IP address "127.0.0.1" with the IP address of the remote computer where Mosquitto is running. You can find the IP address of that computer by opening a command prompt (on Windows) or a terminal (on Linux or macOS) and typing "ipconfig" (or "ifconfig" on Linux/macOS). Look for the IP address listed under "IPv4 Address" or "inet". Once you have the IP address, you can use it to connect to Mosquitto from your application by replacing "127.0.0.1" with the remote computer's IP address. I hope this helps, and if you have any further questions, please feel free to ask! Thank you again for your comment and for watching my video.

[@trile6518]

@@CodingDroplets I replaced IP address for both applications on two PCs. but it didn't work. Ports also are allowed in Window FireWall. Could you give any suggestions?

[@edinetgrunhed6000]

thanks for this video i learned a lot, can you add event that if a broker is disconnect it will notify the application

[@CodingDroplets]

Thank you for watching the video and for your comment! I'm glad to hear that you learned a lot from it. To answer your question about detecting when the MQTT broker disconnects, you can use the ConnectionClosed event provided by the M2MQTT library. This event is raised when the connection to the broker is closed, allowing you to handle it in your application.

[@edinetgrunhed6000]

@@CodingDroplets can u procide the code, its not working when i tried

[@wolfgangwulz8079]

Its a nice video and explanation is good, but I tried running on two different computers (exchanged IP-Address) but it didn't work. Do you have any suggestion?

[@CodingDroplets]

It will work. Your firewall might be blocking the incoming request. Try adding an inbound rule in firewall.

[@juancarlosabad3298]

thank you but you should at least mention which MQTT server (not service) you started on your manchine...is it a Mosquitto MQTT server? thank you in advance!

[@CodingDroplets]

Sorry for that. I really missed to mention that in the video. I've used Mosquitto MQTT Server.

[@jettaglnegro]

Puedes crear un void conect-mqtt(); y llámalo desde un botón?

[@CodingDroplets]

Sorry for the delayed reply. Yes.. that can also be done. In this demo we are initiating MQTT service on loading itself.

[@jettaglnegro]

@@CodingDroplets muchas gracias

[@jettaglnegro]

You know how to invoke the method of when the connection to the broker is lost.

[@CodingDroplets]

The m2mqtt client has a "ConnectionClosed" event. You can implement your reconnect method in it.

[@jettaglnegro]

@@CodingDroplets if that was the one I used ... but it takes 2 minutes to confirm the loss of the connection .. how did I reduce the time?

[@KemauSi]

How do I install the friggin service than?

[@CodingDroplets]

mosquitto.org/

[@KarmaYuta]

hi, great. can you able to provide a video fpr Asp core 5.0?

[@CodingDroplets]

Hello Suresh Rao, First of all I need to thank you for taking time to comment the video. We, Coding Droplets have already done videos using dotnet5 and dotnet 6 frameworks. In our Blazor Tutorial series we have used dotnet5 and dotnet6. Link below for your reference. Blazor Tutorial: kzbin.info/www/bejne/morCcoqaeN-mebs If you are an API developer you might be interested in our gRPC Tutorial series which is also developed using dotnet6. Link below. gRPC Tutorial Series: kzbin.info/www/bejne/rl7OpaqDibNjj9k Also, please let us know what kind of tutorials your are interested in. Coding Droplets will be there always to help you for dotnet development. Once again thank you very much for your continued support.

[@bielschz2302]

How can I connect to another networked machine, and publish there?

[@CodingDroplets]

You can provide the Machine IP address in the connection. Please make sure the port number is enabled in firewall.

[@pioneer-sr4dh]

how can keep alive my connection please help me

[@CodingDroplets]

MQTT Client is having an event that can be fired on disconnection. You can try reconnecting again while firing the disconnection event.

[@pioneer-sr4dh]

@@CodingDroplets I do search about that but I didn't get any thing can you help me with this

[@CodingDroplets]

@@pioneer-sr4dh You can find an event with the name "ConnectionClosed". Whenever the connection is lost, application will trigger this event.

[@pioneer-sr4dh]

@@CodingDroplets ok thanks bro

[@khaledbadiy7108]

perfect can you please shear the source code id it possible

[@CodingDroplets]

Sure. We'll share the source code link soon.

[@khaledbadiy7108]

@@CodingDroplets really it's a pleasure to have people share knowledge like this how can I contact you for business staff. please send me an email to this one [e-mail]

[@CodingDroplets]

@@khaledbadiy7108 We are sorry to say that we don't provide recruitment services. We are just a team of experienced Software Developers and we share the knowledge for those who are in need.

[@CodingDroplets]

We have added the Sample Project download URL in the video description.

[@khaledbadiy7108]

@@CodingDroplets Thank you so much for your help :)

[@AmitNaik8103]

Nice tutorial, but source code not able to open. could you share github link of source code

[@CodingDroplets]

Please use the new github url mentioned in the video description.

[@itebguich8632]

please can you post the source of the code if possible.

[@CodingDroplets]

We have added the Sample Project download URL in the video description.

[@xinjin871]

Can we get the source code?

[@CodingDroplets]

You can find the source code from the below github repository: github.com/codingdroplets/MqttCSharpSample

[@MartinMaat]

Thank you. The piano was just distracting and annoying, please do not apply this to your videos again.

[@CodingDroplets]

Sorry! Noted

[@cozmadenis4752]

Hi, i have a problem with the connection, it gives this error uPLibrary.Networking.M2Mqtt.Exceptions.MqttConnectionException: 'Exception connecting to the broker'. SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:1883 . Any ideas solving it? Nice tutorial, btw.

[@CodingDroplets]

Do you have MQTT Service installed in your machine?

[@cozmadenis4752]

@@CodingDroplets Yes, i do

[@CodingDroplets]

1883 is the default port number for MQTT service. Have you assigned any custom port number? We have provisions to assign custom port number instead of 1883. Try telnet from command prompt to check the connectivity: telnet localhost 1883 You may need to install Telnet Client if it is not installed

[@CodingDroplets]

Also make sure the MQTT service is running.

[@faisalreza9887]

@@CodingDroplets Hallow, how to install MQTT Service in my computer?