gistfile1.txt

#include <ESP8266WiFi.h>



#include <ESP8266WiFi.h>

#ifndef STASSID
#define STASSID "HUAWEI-AnqK"
#define STAPSK  "KKXY244m"
#endif

const char* ssid     = STASSID;
const char* password = STAPSK;

const char* host = "api.etherscan.io";
const uint16_t port = 80;
String  data = "";
#include <LiquidCrystal_I2C.h>
#include <Wire.h> 
  
LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);
  
  uint8_t heart[8] = {0x0,0xa,0x1f,0x1f,0xe,0x4,0x0};  // example sprite bitmap
  
  
void setup() {
   lcd.begin(0,2);      // In ESP8266-01, SDA=0, SCL=2               
    lcd.backlight();
    lcd.createChar(1, heart);
  Serial.begin(9600);
  Wire.begin(D1, D0);
  // 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() {
   lcd.home();                // At column=0, row=0
    lcd.print("ESP8266");   
    lcd.setCursor(0, 1);
    lcd.print("LiquidCrystalI2C");
    delay(500);
    lcd.setCursor(10, 0);      // At column=10, row=0
    lcd.write(byte(1));
    delay(500);
    lcd.setCursor(10, 0);      // At column=10, row=0
    lcd.print(" ");            // Wipe sprite
  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("GET /api?module=stats&action=ethprice&apikey=YourApiKeyToken HTTP/1.0");
    client.println("Host: api.etherscan.io");
    client.println();
    
  }

  // 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());
    data+=ch;
    Serial.print(ch);
  }

  // Close the connection
  int begin = data.indexOf("ethusd")+9;
  int end = data.indexOf('"',begin);
  String price = data.substring(begin,end);
  Serial.println();
  Serial.println(begin);
  Serial.println(end);
  Serial.println(price);
  Serial.println("closing connection");
  client.stop();

  delay(300000); // execute once every 5 minutes, don't flood remote service
}