2

I've read several other posts but I still couldn't solve the issue. I'm trying to connect to a website which is HTTP (not HTTPS) but I always get code -1 as response. If I open the link in the browser it works well. Not sure what I am missing? Here's my full code:

#include <ESP8266HTTPClient.h>
#include <esp8266wifi.h>

const char* ssid = "";
const char* password = "";

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {

    delay(1000);
    Serial.print("Connecting..");

  }
}

void loop() {

  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin("www.francescosoave.com/blind/getTime.php");
    http.addHeader("Content-Type", "text/html");
    int httpCode = http.GET();

    Serial.print("HTTP CODE: ");
    Serial.println(httpCode);

    if(httpCode > 0){
      String payload = http.getString();
      Serial.print("PAYLOAD: ");
      Serial.println(payload);
    }

    http.end();
  }

  delay(2000);
}
0

2 Answers 2

4

You omitted the protocol part of the url. The HttpClient implementation requires it.

Use http.begin("http://www.francescosoave.com/blind/getTime.php");

Do not use Content-type header. You do not send any content.

Turn-on debug in Tools menu. Set Debug Port to Serial and Debug Level to HTTP_CLIENT to see the error messages.

1

to add an additional point to @juraj answer these are the HTTP code for various errors written in ESP8266HTTPClient.h

#define HTTPCLIENT_DEFAULT_TCP_TIMEOUT (5000)

/// HTTP client errors
#define HTTPC_ERROR_CONNECTION_FAILED   (-1)
#define HTTPC_ERROR_SEND_HEADER_FAILED  (-2)
#define HTTPC_ERROR_SEND_PAYLOAD_FAILED (-3)
#define HTTPC_ERROR_NOT_CONNECTED       (-4)
#define HTTPC_ERROR_CONNECTION_LOST     (-5)
#define HTTPC_ERROR_NO_STREAM           (-6)
#define HTTPC_ERROR_NO_HTTP_SERVER      (-7)
#define HTTPC_ERROR_TOO_LESS_RAM        (-8)
#define HTTPC_ERROR_ENCODING            (-9)
#define HTTPC_ERROR_STREAM_WRITE        (-10)
#define HTTPC_ERROR_READ_TIMEOUT        (-11)

-1 usually indicate bad URL or bad wifi connection

1
  • -1 means that connect failed. in this case because of the wrong port used because of the missing protocol part
    – Juraj
    Aug 25, 2022 at 4:56

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