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/*
This sketch establishes a TCP connection to a "quote of the day" service.
It sends a "hello" message, and then prints received data.
*/
#include <ESP8266WiFi.h>
#ifndef STASSID
#define STASSID "your-ssid"
#define STAPSK "your-password"
#endif
const char* ssid = STASSID;
const char* password = STAPSK;
const char* host = "djxmmx.net";
const uint16_t port = 17;
void setup() {
Serial.begin(115200);
// We start by connecting to a WiFi network
Serial.println();
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
/* Explicitly set the ESP8266 to be a WiFi-client, otherwise, it by default,
would try to act as both a client and an access-point and could cause
network-issues with your other WiFi-devices on your WiFi-network. */
WiFi.mode(WIFI_STA);
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());
}
void loop() {
static bool wait = false;
Serial.print("connecting to ");
Serial.print(host);
Serial.print(':');
Serial.println(port);
// Use WiFiClient class to create TCP connections
WiFiClient client;
if (!client.connect(host, port)) {
Serial.println("connection failed");
delay(5000);
return;
}
// This will send a string to the server
Serial.println("sending data to server");
if (client.connected()) { client.println("hello from ESP8266"); }
// wait for data to be available
unsigned long timeout = millis();
while (client.available() == 0) {
if (millis() - timeout > 5000) {
Serial.println(">>> Client Timeout !");
client.stop();
delay(60000);
return;
}
}
// Read all the lines of the reply from server and print them to Serial
Serial.println("receiving from remote server");
// not testing 'client.connected()' since we do not need to send data here
while (client.available()) {
char ch = static_cast<char>(client.read());
Serial.print(ch);
}
// Close the connection
Serial.println();
Serial.println("closing connection");
client.stop();
if (wait) {
delay(300000); // execute once every 5 minutes, don't flood remote service
}
wait = true;
}