m5paper_weather_wifi.ino

M5Paper IoT Development Kit with 4.7-inch Touchscreen e-Ink Display · File : m5paper_weather_wifi.ino · Language : C++ (Arduino) · Use case : Récupérer la météo via API et l'afficher sur l'écran avec rafraîchissement partiel pour économiser l'énergie.

Connects the M5Paper to Wi-Fi, queries a weather API, and displays the temperature on the e-Ink.

m5paper_weather_wifi.ino

#include <M5EPD.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>

const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASS";
const char* api_url = "http://api.openweathermap.org/data/2.5/weather?q=Paris&appid=YOUR_API_KEY&units=metric";

M5EPD_Canvas canvas(&M5.EPD);

void setup() {
  M5.begin();
  M5.EPD.SetRotation(90);
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) { delay(500); }
  
  canvas.createCanvas(540, 960);
  canvas.setTextSize(2);
}

void loop() {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(api_url);
    int httpCode = http.GET();
    if (httpCode == HTTP_CODE_OK) {
      String payload = http.getString();
      DynamicJsonDocument doc(1024);
      deserializeJson(doc, payload);
      float temp = doc["main"]["temp"];
      String desc = doc["weather"][0]["description"];
      
      canvas.clear();
      canvas.setCursor(10, 10);
      canvas.printf("Temp: %.1f C\nDesc: %s", temp, desc.c_str());
      canvas.pushCanvas(0, 0, UPDATE_MODE_GC16);
    }
    http.end();
  }
  delay(600000); // Update every 10 mins
}

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