| https://blog.csdn.net/qq_40181592/article/details/119176805 |
天气信息通过心知天气 seniverse.com 官方API获取，免费提供天气实况及未来三天的天气，首先注册登录。
https://seniverse.yuque.com/books/share/e52aa43f-8fe9-4ffa-860d-96c0f3cf1c49/nyiu3
天气实况API：https://api.seniverse.com/v3/weather/now.json?key=你的私钥&location=查询城市的拼音&language=zh-Hans&unit=c当天+未来3天天气API:https://api.seniverse.com/v3/weather/daily.json?key=你的私钥&location=查询城市的拼音&language=zh-Hans&unit=c&start=0&days=5生活指数API ：https://api.seniverse.com/v3/life/suggestion.json?key=你的私钥&location=查询城市的拼音&language=zh-Hans
https://api.seniverse.com/v3/weather/now.json?key=SiFlIC-Dte98pIK7z&location=haerbin&language=zh-Hans&unit=c{"results":[{"location":{"id":"YB1UX38K6DY1","name":"哈尔滨","country":"CN","path":"哈尔滨,哈尔滨,黑龙江,中国","timezone":"Asia/Shanghai","timezone_offset":"+08:00"},"now":{"text":"晴","code":"0","temperature":"19"},"last_update":"2022-05-16T13:54:10+08:00"}]}
https://arduinojson.org/
TFT_eSPI tft = TFT_eSPI();const char *ssid = "********";const char *password = "********";const char* host = "api.seniverse.com"; //心知天气服务器地址String now_address="",now_weather="",now_temperature="";void get_weather(){WiFiClient client; //创建TCP连接const int httpPort = 80;if (!client.connect(host, httpPort)){Serial.println("connection failed"); //网络请求无响应打印连接失败return;}//URL请求地址String url ="/v3/weather/now.json?key=SiFlIC-Dte98pIK7z&location=haerbin&language=zh-Hans&unit=c";//发送网络请求client.print(String("GET ") + url + " HTTP/1.1\r\n" +"Host: " + host + "\r\n" +"Connection: close\r\n\r\n");delay(5000);//定义answer变量用来存放请求网络服务器后返回的数据String answer;while(client.available()){String line = client.readStringUntil('\r');answer += line;}//断开服务器连接client.stop();Serial.println();Serial.println("closing connection");//获得json格式的数据String jsonAnswer;int jsonIndex;//找到有用的返回数据位置i 返回头不要for (int i = 0; i < answer.length(); i++){if (answer[i] == '{'){jsonIndex = i;break;}}jsonAnswer = answer.substring(jsonIndex);Serial.println();Serial.println("JSON answer: ");Serial.println(jsonAnswer);StaticJsonDocument<512> doc;deserializeJson(doc, jsonAnswer);JsonObject results_0 = doc["results"][0];JsonObject results_0_location = results_0["location"];const char* results_0_location_name = results_0_location["name"]; // "哈尔滨"JsonObject results_0_now = results_0["now"];const char* results_0_now_text = results_0_now["text"]; // "晴"const char* results_0_now_temperature = results_0_now["temperature"]; // "19"now_address = results_0_location_name;now_weather = results_0_now_text;now_temperature = results_0_now_temperature;}void setup(){Serial.begin(115200);WiFi.begin(ssid, password); // 连接网络while (WiFi.status() != WL_CONNECTED) //等待wifi连接{delay(500);Serial.print(".");}Serial.println("");Serial.println("WiFi connected"); //连接成功Serial.print("IP address: "); //打印IP地址tft.init(); //初始化tft.fillScreen(TFT_BLACK); //屏幕颜色get_weather();}void loop(){show_weather(TFT_WHITE,TFT_BLACK); // 显示天气界面}void show_weather(uint16_t fg,uint16_t bg){tft.setSwapBytes(true); //使图片颜色由RGB->BGRshowMyFonts(40, 40, now_address.c_str(), TFT_WHITE);showMyFonts(45, 60, now_weather.c_str(), TFT_WHITE);//showMyFonts(75, 100, now_temperature.c_str(), TFT_WHITE);showtext(55,80,1,1,fg,bg,now_temperature);}/*******************整句字符串显示****************/void showtext(int16_t x,int16_t y,uint8_t font,uint8_t s,uint16_t fg,uint16_t bg,const String str){//设置文本显示坐标，和文本的字体，默认以左上角为参考点，tft.setCursor(x, y, font);// 设置文本颜色为白色，文本背景黑色tft.setTextColor(fg,bg);//设置文本大小，文本大小的范围是1-7的整数tft.setTextSize(s);// 设置显示的文字，注意这里有个换行符 \n 产生的效果tft.println(str);}/*******************单个汉字显示****************/void showMyFont(int32_t x, int32_t y, const char c[3], uint32_t color) {for (int k = 0; k < 26; k++)// 根据字库的字数调节循环的次数if (hanzi[k].Index[0] == c[0] && hanzi[k].Index[1] == c[1] && hanzi[k].Index[2] == c[2]){ tft.drawBitmap(x, y, hanzi[k].hz_Id, hanzi[k].hz_width, 16, color);}}/*******************整句汉字显示****************/void showMyFonts(int32_t x, int32_t y, const char str[], uint32_t color) { //显示整句汉字，字库比较简单，上下、左右输出是在函数内实现int x0 = x;for (int i = 0; i < strlen(str); i += 3) {showMyFont(x0, y, str+i, color);x0 += 17;}}
TFT显示天气信息：
