I am creating a home weather station but the Arduino IDE shows

"expected ';' before 'viewport'". 

It detects wrong quotation marks. My code:

     String message2 = "<!DOCTYPE html>";
  message2 += "<head>";
  message2 +=  "<title>Bootstrap Example</title>";
  message2 += " <meta name="viewport" content="width=device-width, initial-scale=1">";
  message2 += "<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">";
  message2 +=  "<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>";
  message2 +=  "<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>";
  message2 += "</head>";
  message2 += "<body>";
  message2 += "<div class="container">";
  message2 +=  "<h2>Teplotná Stanica</h2>";
  message2 +=  "<p>Teplota:";
  message2 +=  dht.readTemperature();
  message2 +=  "</p>";

  server.send(200, "text/html", message2);}

Can someone tell me what´s wrong? I am using Arduino IDE

  • 1
    Have you looked at your quotes yet? All of them? Nov 12 '17 at 15:04
  • I wonder who upvoted this question.
    – user31481
    Nov 13 '17 at 15:14
  • Your question has been answered. Please, accept the answer to close this question.
    – user31481
    Nov 17 '17 at 9:31

In C you can not use quotation marks inside quotation marks (thus nested).


message2 += " <meta name="viewport" content="width=device-width, initial-scale=1">";


message2 += " <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">";

By using the escape character \ it means that \" is a character (") instead of the beginning or start of a string.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.