Книги
Arduino
Розділ 11. HTML та веб
Завантаження веб-сторінки

Arduino:
Завантаження веб-сторінки

How to: (Як зробити:) 

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

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

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }

  Serial.println("Connected to the WiFi network");
  
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin("http://example.com"); //Replace with your URL
    int httpCode = http.GET();
    
    if (httpCode > 0) {
        Serial.printf("HTTP Code: %d\n", httpCode);
        String payload = http.getString();
        Serial.println("Received webpage:");
        Serial.println(payload);
    } else {
        Serial.printf("Error in HTTP request. HTTP Code: %d\n", httpCode);
    }
    http.end();
  }
}

void loop() {
}

Output:

Connecting to WiFi...
Connected to the WiFi network
HTTP Code: 200
Received webpage:
<!DOCTYPE html><html><head><title>Example Domain</title>...

Deep Dive (Поглиблений Аналіз)

Back in the early 2000s, when microcontrollers started gaining internet access, downloading a webpage was a complex task. Now, with modules like the ESP8266, it’s simpler. ESP8266 is a Wi-Fi-capable microchip allowing Arduino boards to access the internet. While the provided code uses ESP8266, alternatives like Ethernet Shield for wired connections or ESP32 for faster Wi-Fi exist. Implementation details include initiating Wi-Fi connection, creating an HTTP client, making a GET request, and processing the response. Remember, managing large strings and ensuring secure connections can be tricky on constrained devices like Arduinos.

See Also (Дивіться Також)

For further reading and related references, check out:

Аналіз HTML