Description
Hardware
Hardware: NodeMCU v1.0 ESP-12E
Core Version: 2.1.0
Description
Well.. if someone could offer some enlightenment.. can't find the error in the following (modified host from the original of course..)
It hangs at client.connect for some time.. and then connection fails.
the same happens in "google.com" or "www.google.com"
other hosts work and reply normally
Is it my network?
I've come to believe that it has something to do with dns resolving (or not..)
Of course I've tried setting various DNS and a static IP -commented sections in code- but no result.
Settings in IDE
Module: NodeMCU v1.0
Flash Size: 4MB
CPU Frequency: 80Mhz
Flash Mode: ?qio?
Flash Frequency: ?40Mhz?
Upload Using: SERIAL
Reset Method: ?ck / nodemcu?
Sketch
/*
* HTTP over TLS (HTTPS) example sketch
*
* This example demonstrates how to use
* WiFiClientSecure class to access HTTPS API.
* We fetch and display the status of
* esp8266/Arduino project continuous integration
* build.
*
* Created by Ivan Grokhotkov, 2015.
* This example is in public domain.
*/
#include <ESP8266WiFi.h>
// Replace with your network credentials
const char* ssid = ".....";
const char* password = ".........";
const char* host = "calendar.google.com";
const int httpsPort = 443;
// Use web browser to view and copy
// SHA1 fingerprint of the certificate
//const char* fingerprint = "CF 05 98 89 CA FF 8E D8 5E 5C E0 C2 E4 F7 E6 C3 C7 50 DD 5C";
const char* fingerprint = "99 70 D6 7C B8 42 71 18 DC A6 88 DB DC C8 69 66 96 9D 51 88"; //google
/*
// Update these with values suitable for your network.
IPAddress ip(192,168,1,229); //Node static IP
IPAddress gateway(192,168,1,1);
IPAddress subnet(255,255,255,0);
IPAddress dns1(208,67,222,222);
IPAddress dns2(208,67,220,220);
*/
// Use WiFiClientSecure class to create TLS connection
WiFiClientSecure client;
void setup() {
Serial.begin(57600);
Serial.println();
Serial.print("connecting to ");
Serial.println(ssid);
//WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
//WiFi.config(ip, gateway, subnet, dns1, dns2);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.println("WiFi connected");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
Serial.print("connecting to ");
Serial.println(host);
if (!client.connect(host, httpsPort)) {
Serial.println("connection failed");
return;
}
if (client.verify(fingerprint, host)) {
Serial.println("certificate matches");
} else {
Serial.println("certificate doesn't match");
}
String url = "/";
Serial.print("requesting URL: ");
Serial.println(url);
client.print(String("GET ") + url + " HTTP/1.1\r\n" +
"Host: " + host + "\r\n" +
"User-Agent: ESP8266\r\n" +
"Connection: close\r\n\r\n");
Serial.println("request sent");
while (client.connected()) {
String line = client.readStringUntil('\n');
if (line == "\r") {
Serial.println("headers received");
break;
}
}
String line = client.readStringUntil('\n');
Serial.println("reply was:");
Serial.println("==========");
Serial.println(line);
Serial.println("==========");
Serial.println("closing connection");
}
void loop() {
}
Debug Messages
connecting to ssid
..
WiFi connected
IP address:
192.168.1.11
connecting to calendar.google.com
connection failed
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