WebServer Ethernet with Arduino PLC

Official Hardware Opta
1

Hello there,
I'm trying to get some variables value visible on a web page, using the OPTA like a WebServer.

First of all, i've tried with the Example tab using Arduino IDE, the " Ethernet WebServer" Example work very well...

But when I try to do the same with Arduino PLC the scketch compile, but seems that the WebServer never go up.
I cand get a ping response from the OPTA, but no web page are shown...

Does someaone be able to do that with Arduino PLC?
Does someone could post an example sketch?

3 Likes
2

After many thentative, still not able to get the WebServer wornking on OPTA device.

I've also update the mbed core to 4.2.0, but still not working.

// shared variables can be accessed with PLCIn.varname and PLCOut.varname


// Enable usage of EtherClass, to set static IP address and other
#include <PortentaEthernet.h>
arduino::EthernetClass eth(&m_netInterface);
EthernetServer server(80);                             //server port     
String readString;

void setup()
{

    Serial.begin(9600);

	// Configure static IP address
	IPAddress ip(192, 168, 188, 253);
	IPAddress dns(8, 8, 8, 8);
	IPAddress gateway(192, 168, 188, 1);
	IPAddress subnet(255, 255, 255, 0);
	// If cable is not connected this will block the start of PLC with about 60s of timeout!
	eth.begin(ip, dns, gateway, subnet);
	server.begin();


}

void loop()
{
    EthernetClient client = server.available();
      if (client) {
        Serial.println("client");
        while (client.connected()) {   
          Serial.println("connected");
          if (client.available()) {
            Serial.println("available");
            char c = client.read();
         
            //read char by char HTTP request
            if (readString.length() < 100) {
              //store characters to string
              readString += c;
              //Serial.print(c);
             }
    
             //if HTTP request has ended
             if (c == '\n') {          
         
               client.println("HTTP/1.1 200 OK"); //send new page
               client.println("Content-Type: text/html");
               client.println();     
               client.println("<HTML>");
               client.println("<BODY>");
               client.println("<H1>Test</H1>");
               client.println("</BODY>");
               client.println("</HTML>");
         
               delay(1);
               //stopping client
               client.stop();
               //controls the Arduino if you press the buttons
               //clearing string for next read
               readString="";  
               
             }
           }
        }
    }
}

On the serial console, i get some "connected" and then...nothing. It stuck.

1 Like
3

Has anyone got this to work?
I think it has to do with PortentaEthernet.h

other Arduino examples use the Ethernet.h include, which doesn't exist in the PLC sketch.

I was trying to follow the finder example: Web Server on the Finder Opta (findernet.com)

but they don't have the includes and the zip download of the example goes to a page not found

It would be appreciated if someone could share a working example of hosting a webpage on the OPTA device.

Thanks

4

I have found the zip file for the demo, have not yet opened it to confirm it works but I am having the same problem as you so hopefully this will help. The zip file is in the assets folder

https://github.com/dndg/FinderOptaWebServerTutorial

Just uploaded to my Opta and it seems to work ok. Note that I had to change the static IP address at three different locations in the sketch for it to work properly. (Line 21, 248, and 264)