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How to communicate to a Arduino behind firewall or router from a website

krrishh

I have developed a arduino application which listens to http connections but I need help in controlling the device through internet like how Blynk does. I have bought a website domain hosting which supports php webpages and python app. If anybosy could point me to a right direction to develop a script which can be hosted to the internet it will be helpful.

P.S : I don't want to use the services like thingspeak or Blynk but i want to develop one like them. Please guide me.

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  • 0

    The subject line you have is different to the content of your message.

    Your subject line is about NAT, port forwarding & firewall ALLOW rules.

    That's how you solve the problem of communicating with an arduino behind a firewall.

     

    The content of your message is about building an application in python to control the arduino.

    Google should be able to provide more than enough reference material on this. The above also

    links to an Instructable article showing you how.

     

    Normally you would use a web framework like Flask to help create the application.

    Python lives under/integrates with Flask.

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  • 0

    The subject line you have is different to the content of your message.

    Your subject line is about NAT, port forwarding & firewall ALLOW rules.

    That's how you solve the problem of communicating with an arduino behind a firewall.

     

    The content of your message is about building an application in python to control the arduino.

    Google should be able to provide more than enough reference material on this. The above also

    links to an Instructable article showing you how.

     

    Normally you would use a web framework like Flask to help create the application.

    Python lives under/integrates with Flask.

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  • 0 in reply to rob65

    Hi Robert, Thank you for your reply. Your link sure would help me. But i am a bit new to python. I will definitely give it a try. I know about NAT , port forwarding and Firewall options in router but unfortunately i wont have access to router in some places. So I want to develop a server hosted in internet which acts as a bridge between application in system and Arduinio. so that both system and arduino connects to the server as a client and communicate between each other. I have seen the same happening when i use Amazon Echo to turn on a emulated device in Arduino. I can see the TCP connection coming inside the network and turning on the device on command. I hope your link help me develop a server application which can be hosted in a normal internet web server.

     

    Thanks.

  • 0 in reply to krrishh

    You can be sneaky about the way you manage it.

    You build the intelligence into your arduino app to handle it.

     

    The web interface contains the state of your arduino.

    The arduino then just reads the information on the web interface/service and replicates the state it reads.

    The web server never actually has to send commands to the arduino. This also eases the constraints on firewall and rules.

     

    For example. if I toggle a value on the web interface. The web interface updates its state.

    The arduino then calls in say every 10 seconds (or some other predetermined time) to see if the state on the website still matches its state.

    If it doesn't then it updates itself.


    If your app isn't real time critical/sensitive this is an easy way to handle it.

  • 0 in reply to rob65

    Hi robert, I have installed python with FLASK in my cPanel. Is it possible to create a server in python which runs and listens to a specific port which does the peer to peer forwarding as a middle man? I have achieved this in C#.NET application but unfortunately it cant be hosted in a web server(LOL). I am also looking onto the Firebase from google but would like to know as much as possible on my own to create my own server to do the forwarding of ports like how teamviewer does.