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標題: 8266 OpenWeather 微型氣象站 [打印本頁]

作者: lwq1947 時間: 2026-4-25 18:47
標題: 8266 OpenWeather 微型氣象站
全機以ESP8266 ESP12E為主用0.96OLED顯示3.7V鋰池供電,安裝在一個3.5X3.5X2的透明PP塑料盒中構成一個微型氣象站.按一下盒子側面的按鍵就會起動微型氣象站開機畫面顯示OpenWeather,然后再顯示氣象數據十秒后自動關機若大家有所需求的話再將程序和電路圖分享出來.

e0147f9022e6fa86910ecbc83277dcbf.jpg (104.09 KB, 下載次數: 0)

外觀圖

作者: lwq1947 時間: 2026-4-29 19:11
由于國內的心知天氣網站免費API只能提供天氣和溫度數據，而OpenWeather網站免費API卻能提供天氣，溫度，體感溫度，濕度，氣壓，風速，風向，能見度，云量，日出時間，日落時間。因此我已將心知程序更改為
OpenWeather程序：

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <U8g2lib.h>
#include <Wire.h>
#include <SPI.h>
#include <dht11.h>

U8G2_SSD1306_128X64_NONAME_F_SW_I2C u8g2(U8G2_R0, /* clock=*/ 5, /* data=*/4, /* reset=*/ U8X8_PIN_NONE);
//使用ST7920顯示
dht11 DHT11;
#define DHT11PIN 14
const char* ssid    = "******";  //你的WIFI名稱
const char* password = "******";  //你的WIFI密碼

const char* host = "api.openweathermap.org";  //你的API密鑰
const char* apiKey = "******";
const char* city = "Beijing";

WiFiClient client;

struct Weather {
  float temp;
  float feelsLike;
  int humidity;
  float pressure;
  float windSpeed;
  int windDeg;
  String weather;
};

Weather weather;

// 英文天氣 → 中文
String weatherToCN(String en) {
  if (en == "Clear")    return "晴天";
  if (en == "Clouds")    return "多云";
  if (en == "Rain")       return "下雨";
  if (en == "Drizzle")    return "毛毛雨";
  if (en == "Thunderstorm")return "雷暴";
  if (en == "Snow")       return "下雪";
  if (en == "Mist")       return "薄霧";
  if (en == "Fog")       return "大霧";
  if (en == "Haze")       return "霧霾";
  return en;
}

float getValue(String json, String key) {
  int idx = json.indexOf(key);
  if (idx == -1) return -999;
  return json.substring(idx + key.length()).toFloat();
}

String getWeatherMain(String json) {
  int idx = json.indexOf("\"main\":\"");
  if (idx == -1) return "N/A";
  int end = json.indexOf("\"", idx + 8);
  return json.substring(idx + 8, end);
}

void parseWeather(String json) {
  weather.temp    = getValue(json, "\"temp\":");
  weather.feelsLike  = getValue(json, "\"feels_like\":");
  weather.humidity = getValue(json, "\"humidity\":");
  weather.pressure = getValue(json, "\"pressure\":");
  weather.windSpeed  = getValue(json, "\"speed\":");
  weather.windDeg = getValue(json, "\"deg\":");
  weather.weather = getWeatherMain(json);
}

void getWeather() {
  if (!client.connect(host, 80)) {
Serial.println("連接失敗");
return;
  }

  String url = "/data/2.5/weather?q=" + String(city)
            + "&appid=" + apiKey
            + "&units=metric";

  client.print("GET " + url + " HTTP/1.1\r\n"
            "Host: " + String(host) + "\r\n"
            "Connection: close\r\n\r\n");

  delay(100);
  String res = client.readStringUntil('\0');
  parseWeather(res);
  client.stop();
}

// ==================== ST7920 顯示 ====================
void showWeatherOnOLED() {
u8g2.clearBuffer();
u8g2.setContrast(255);
  // 必須設置中文字體！！！你原來沒這句，必黑屏重啟
  u8g2.setFont(u8g2_font_wqy12_t_gb2312a);
  int chk = DHT11.read(DHT11PIN);
  int t= (float)DHT11.temperature;
  int h=(float)DHT11.humidity;

u8g2.drawUTF8(0, 12, "天氣: ");
  u8g2.drawUTF8(32, 12, weatherToCN(weather.weather).c_str());

  char tempStr[20];
  sprintf(tempStr, "溫度: %.0f %C", weather.temp);
  u8g2.drawUTF8(70, 12, tempStr);

  char humiStr[20];
  sprintf(humiStr, "濕度: %d %%", weather.humidity);
  u8g2.drawUTF8(0, 28, humiStr);

  char feelStr[20];
  sprintf(feelStr, "體感: %.0f %C", weather.feelsLike);
  u8g2.drawUTF8(70, 28, feelStr);

  char degStr[20];
  sprintf(degStr, "風向: %d°", weather.windDeg);
  u8g2.drawUTF8(0, 44, degStr);

  char windStr[20];
  sprintf(windStr, "風速: %.0f %M", weather.windSpeed);
  u8g2.drawUTF8(70, 44, windStr);

  u8g2.drawUTF8(0, 60, "室溫: C");
  u8g2.setCursor(32,60);
  u8g2.print(t);

  u8g2.drawUTF8(70, 60, "濕度: %");
  u8g2.setCursor(102,60);
  u8g2.print(h);

  u8g2.sendBuffer();
  delay(10000);
  digitalWrite(15, LOW);
  digitalWrite(13, LOW);
}

void setup() {

  Serial.begin(115200);
  u8g2.begin();
  pinMode(15, OUTPUT);
  digitalWrite(15, HIGH);
  pinMode(13, OUTPUT);
  digitalWrite(13, HIGH);
  u8g2.clearBuffer();
  u8g2.setContrast(255);
  u8g2.setFont(u8g2_font_ncenB14_tr);
  u8g2.drawUTF8(0, 40, "OpenWeather");
  u8g2.sendBuffer();

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
  }
  Serial.println("\nWiFi 已連接");


  getWeather();

  Serial.println("===== 天氣 =====");
  Serial.println("天氣: " + weatherToCN(weather.weather));
  Serial.printf("溫度: %.1f°C\n", weather.temp);
  Serial.printf("體感: %.1f°C\n", weather.feelsLike);
  Serial.printf("濕度: %d%%\n", weather.humidity);

  showWeatherOnOLED();
}

void loop() {
  // 不循環刷新，穩定不卡死
}

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顯示圖

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