ESP32 BASICS · LESSON 20

Project: A Wi-Fi Weather Display

Putting it together: Wi-Fi, an HTTP request, and a small display in one finished build.

This project pulls several earlier lessons together: connecting to Wi-Fi, making an HTTP request, and showing the result — a small board that displays a weather figure it fetched from the internet.

weather_display.ino

#include 
#include 

const char* ssid = "your-network-name";
const char* password = "your-network-password";
const char* apiUrl = "http://example.local/weather"; // your own data source

void setup() {
  Serial.begin(115200);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) delay(300);
  Serial.println("Wi-Fi connected");
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(apiUrl);
    if (http.GET() == 200) {
      String reading = http.getString();
      Serial.print("Latest reading: ");
      Serial.println(reading); // swap this for display.print(reading) with a real screen
    }
    http.end();
  }
  delay(60000); // check once a minute
}

Taking it further

Swap the Serial.println line for calls into a small display library once a screen is wired up over I2C or SPI.
Add deep sleep between checks if the project will run on a battery.
Point apiUrl at any service that returns a simple reading — a weather feed, a home sensor, or a value from your own small web server.

KEY IDEA

Every finished ESP32 project is the same handful of building blocks from this course, combined — nothing here needed a technique you haven't already seen.

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