ESP8266 Community Forum

- Tue Aug 18, 2015 1:10 pm #26391 Hello,
here is my source file.
I connect to www.example.com, but for the rest it is the WiFiClient example.

Thanks!
Marcello

---------------
// Import required libraries
#include <ESP8266WiFi.h>

// WiFi parameters
const char* ssid = "";
const char* password = "";

// Host
const char* host = "www.example.com";

void setup() {
// Start Serial
Serial.begin(115200);
delay(10);

// We start by connecting to a WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
}

int value = 0;

void loop() {

Serial.print("Connecting to ");
Serial.println(host);

// Use WiFiClient class to create TCP connections
WiFiClient client;
const int httpPort = 80;
if (!client.connect(host, httpPort)) {
Serial.println("connection failed");
return;
}

// This will send the request to the server
client.print(String("GET /") + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"Connection: close\r\n\r\n");
delay(10);

Serial.print("client.status(): ");
Serial.println(client.status());
Serial.print("client.available(): ");
Serial.println(client.available());
Serial.print("client.connected(): ");
Serial.println(client.connected());

// Read all the lines of the reply from server and print them to Serial
while(client.connected()){
String line = client.readStringUntil('\r');
Serial.print(line);
}

Serial.println();
Serial.println("closing connection");
delay(5000);

}

- Tue Aug 18, 2015 1:47 pm #26395 The reason why it didn't originally worked is the fact that this "www.example.com" doesn't send an CR or CRLF, it is only sending LF ...

So, putting back the available() is working if we are printing lines ending with LF

Code: Select allwhile(client.available()){
String line = client.readStringUntil('\n'); // <---- look for LF here instead of CR
Serial.print(line);
}


- Tue Aug 18, 2015 3:31 pm #26406 I tried what you said, but it still does not work for me.

Thanks,
Marcello

- Tue Aug 18, 2015 4:38 pm #26410 Could it be that the response is being a bit slow so the code needs to first wait for it to be available? After the client.print try changing the delay(10) to this:

Code: Select all while(!client.available()){
    yield();
  }