I am trying to put a web server on my Wemos D1 mini pro. I am using this example for the Arduino code:
https://github.com/wemos/Arduino_D1/blob/master/doc/esp8266wifi/server-examples.rst
#include <ESP8266WiFi.h>
const char* ssid = "GL-AR300M-ceb";
const char* password = "********";
WiFiServer server(80);
void setup()
{
Serial.begin(115200);
Serial.println();
Serial.printf("Connecting to %s ", ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED)
{
delay(500);
Serial.print(".");
}
Serial.println(" connected");
server.begin();
Serial.printf("Web server started, open %s in a web browser\n", WiFi.localIP().toString().c_str());
}
// prepare a web page to be send to a client (web browser)
String prepareHtmlPage()
{
String htmlPage =
String("HTTP/1.1 200 OK\r\n") +
"Content-Type: text/html\r\n" +
"Connection: close\r\n" + // the connection will be closed after completion of the response
"Refresh: 5\r\n" + // refresh the page automatically every 5 sec
"\r\n" +
"<!DOCTYPE HTML>" +
"<html>" +
"Analog input: " + String(analogRead(A0)) +
"</html>" +
"\r\n";
return htmlPage;
}
void loop()
{
WiFiClient client = server.available();
// wait for a client (web browser) to connect
if (client)
{
Serial.println("\n[Client connected]");
while (client.connected())
{
// read line by line what the client (web browser) is requesting
if (client.available())
{
String line = client.readStringUntil('\r');
Serial.print(line);
// wait for end of client's request, that is marked with an empty line
if (line.length() == 1 && line[0] == '\n')
{
client.println(prepareHtmlPage());
break;
}
}
}
delay(1); // give the web browser time to receive the data
// close the connection:
client.stop();
Serial.println("[Client disonnected]");
}
}
It uploads fine and when I open the serial monitor get this:
Connecting to GL-AR300M-ceb . connected Web server started, open 192.168.8.119 in a web browser
When I go to the IP address that it gives in the monitor, I only see a blank page. I also can't inspect element, so it doesn't load the HTML part I guess.
When I change the code like this:
if (client.available())
{
// String line = client.readStringUntil('\r');
// Serial.print(line);
// // wait for end of client's request, that is marked with an empty line
// if (line.length() == 1 && line[0] == '\n')
// {
// client.println(prepareHtmlPage());
// break;
// }
client.println(prepareHtmlPage());
}
And when i add the break in the code like so:
client.println(prepareHtmlPage());
break;
in the code, i get the blank page again.
Does someone have an idea what the problem might be?