m5paper_wifi_weather.ino
Connects to a Wi-Fi network, fetches weather data via API, and displays it on the screen.
Requires WiFi, HTTPClient, and ArduinoJson libraries. The M5Paper uses its ESP32 Wi-Fi module. The e-Ink display is ideal for this use case as it only consumes power during refresh. Replace credentials with your own.
m5paper_wifi_weather.ino
#include <M5EPD.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";
const char* apiURL = "http://api.openweathermap.org/data/2.5/weather?q=Paris&appid=YOUR_API_KEY&units=metric";
M5EPD m5;
void setup() {
m5.begin();
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("\nConnected");
}
void loop() {
if (WiFi.status() == WL_CONNECTED) {
HTTPClient http;
http.begin(apiURL);
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 weather = doc["weather"][0]["main"];
m5.clear();
m5.drawCentreString("Weather Paris", 480, 100, 4);
m5.drawCentreString("Temp: " + String(temp) + " C", 480, 200, 4);
m5.drawCentreString("Cond: " + weather, 480, 250, 4);
m5.updateFrame();
}
http.end();
}
delay(60000); // Update every minute
}