怎么构建请求？

比如这个：

根据官方提供的API，然后自己填入相关参数进行构建

看官方提供的手册

然后再看他提供的API接口。

这是接口地址，看参数说明，然后自己按要求填写

代码一（24小时的，没有预测）:

#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <string.h>
#include <WiFiMulti.h>
#include <ArduinoJson.h>void TandW();
void httpRequest(String reqRes,int stat);
void connectWiFi();
void parseInfo_now(WiFiClient client,int i);
void parseInfo_fut(WiFiClient client,int i);unsigned int localPort = 8888; // 用于侦听UDP数据包的本地端口
WiFiClient clientNULL;//网络校时的相关配置
static const char ntpServerName[] = "ntp1.aliyun.com"; //NTP服务器，使用阿里云
int timeZone = 8; //时区设置，采用东8区//保存断网前的最新数据
int results_0_now_temperature_int_old;
String results_0_now_text_str_old;
int results_0_daily_1_high_int_old;
int results_0_daily_1_low_int_old;
String results_0_daily_1_text_day_str_old;//----------WIFI连接配置----------
const char* ssid     = "your ssid";       // 连接WiFi名（此处使用XXX为示例）
const char* password = "your password";          // 连接WiFi密码（此处使用12345678为示例）// 请将您需要连接的WiFi密码填入引号中
//----------天气API配置----------
const char* host = "api.seniverse.com";   // 将要连接的服务器地址
const int httpPort = 80;              // 将要连接的服务器端口      // 心知天气HTTP请求所需信息
String reqUserKey = "your secret key";   // 私钥
String reqLocation = "jiujiang";            // 城市
String reqUnit = "c";
WiFiMulti wifiMulti;
WiFiClient client;void setup() {Serial.begin(115200);   connectWiFi();}void loop() {TandW();delay(5000);}void TandW(){String reqRes = "/v3/weather/now.json?key=" + reqUserKey ++ "&location=" + reqLocation + "&language=en&unit=" +reqUnit;// 向心知天气服务器服务器请求信息并对信息进行解析httpRequest(reqRes,0);//延迟，需要低于20次/分钟delay(5000);
}
// 向心知天气服务器服务器请求信息并对信息进行解析
void httpRequest(String reqRes,int stat){WiFiClient client;// 建立http请求信息String httpRequest = String("GET ") + reqRes + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "Connection: close\r\n\r\n";Serial.println(""); Serial.print("Connecting to "); Serial.print(host);// 尝试连接服务器if (client.connect(host, 80)){Serial.println(" Success!");// 向服务器发送http请求信息client.print(httpRequest);Serial.println("Sending request: ");Serial.println(httpRequest);  // 获取并显示服务器响应状态行 String status_response = client.readStringUntil('\n');Serial.print("status_response: ");Serial.println(status_response);// 使用find跳过HTTP响应头if (client.find("\r\n\r\n")) {Serial.println("Found Header End. Start Parsing.");}if (stat == 0){// 利用ArduinoJson库解析心知天气响应信息(实时数据)parseInfo_now(client,1); }else if(stat == 1){parseInfo_fut(client,1);}}else {Serial.println(" connection failed!");if (stat == 0){// 利用ArduinoJson库解析心知天气响应信息(实时数据)parseInfo_now(clientNULL,0); }else if(stat == 1){parseInfo_fut(clientNULL,0);}}//断开客户端与服务器连接工作client.stop();
}
// 连接WiFi
void connectWiFi(){WiFi.begin(ssid, password);                  // 启动网络连接Serial.print("Connecting to ");              // 串口监视器输出网络连接信息Serial.print(ssid); Serial.println(" ...");  // 告知用户NodeMCU正在尝试WiFi连接int i = 0;                                   // 这一段程序语句用于检查WiFi是否连接成功while (WiFi.status() != WL_CONNECTED) {      // WiFi.status()函数的返回值是由NodeMCU的WiFi连接状态所决定的。 delay(1000);                               // 如果WiFi连接成功则返回值为WL_CONNECTED                       Serial.print(i++); Serial.print(' ');      // 此处通过While循环让NodeMCU每隔一秒钟检查一次WiFi.status()函数返回值}                                            // 同时NodeMCU将通过串口监视器输出连接时长读秒。// 这个读秒是通过变量i每隔一秒自加1来实现的。                                              Serial.println("");                          // WiFi连接成功后Serial.println("Connection established!");   // NodeMCU将通过串口监视器输出"连接成功"信息。Serial.print("IP address:    ");             // 同时还将输出NodeMCU的IP地址。这一功能是通过调用Serial.println(WiFi.localIP());              // WiFi.localIP()函数来实现的。该函数的返回值即NodeMCU的IP地址。
}
// 利用ArduinoJson库解析心知天气响应信息(实时)
void parseInfo_now(WiFiClient client,int i){if(i==1){const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_OBJECT_SIZE(1) + 2*JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 230;DynamicJsonDocument doc(capacity);deserializeJson(doc, client);JsonObject results_0 = doc["results"][0];JsonObject results_0_now = results_0["now"];const char* results_0_now_text = results_0_now["text"]; // "Sunny"const char* results_0_now_code = results_0_now["code"]; // "0"const char* results_0_now_temperature = results_0_now["temperature"]; // "32"const char* results_0_last_update = results_0["last_update"]; // "2020-06-02T14:40:00+08:00" // 通过串口监视器显示以上信息String results_0_now_text_str = results_0_now["text"].as<String>(); int results_0_now_code_int = results_0_now["code"].as<int>(); int results_0_now_temperature_int = results_0_now["temperature"].as<int>(); String results_0_last_update_str = results_0["last_update"].as<String>();   Serial.println(F("======Weahter Now======="));Serial.print(F("Weather Now: "));Serial.print(results_0_now_text_str);Serial.print(F(" "));Serial.println(results_0_now_code_int);Serial.print(F("Temperature: "));Serial.println(results_0_now_temperature_int);Serial.print(F("Last Update: "));Serial.println(results_0_last_update_str);Serial.println(F("========================"));//display_0(results_0_now_temperature_int,results_0_now_text_str);results_0_now_text_str_old = results_0_now_text_str;results_0_now_temperature_int_old = results_0_now_temperature_int;}else{//display_0(results_0_now_temperature_int_old,results_0_now_text_str_old);}}
// 利用ArduinoJson库解析心知天气响应信息(预测)
void parseInfo_fut(WiFiClient client,int i){if(i==1){const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_ARRAY_SIZE(3) + JSON_OBJECT_SIZE(1) + JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 3*JSON_OBJECT_SIZE(14) + 860;DynamicJsonDocument doc(capacity);deserializeJson(doc, client);JsonObject results_0 = doc["results"][0];JsonArray results_0_daily = results_0["daily"];JsonObject results_0_daily_0 = results_0_daily[0];const char* results_0_daily_0_date = results_0_daily_0["date"]; const char* results_0_daily_0_text_day = results_0_daily_0["text_day"]; const char* results_0_daily_0_code_day = results_0_daily_0["code_day"];const char* results_0_daily_0_text_night = results_0_daily_0["text_night"]; const char* results_0_daily_0_code_night = results_0_daily_0["code_night"]; const char* results_0_daily_0_high = results_0_daily_0["high"];const char* results_0_daily_0_low = results_0_daily_0["low"]; const char* results_0_daily_0_rainfall = results_0_daily_0["rainfall"];const char* results_0_daily_0_precip = results_0_daily_0["precip"]; const char* results_0_daily_0_wind_direction = results_0_daily_0["wind_direction"]; const char* results_0_daily_0_wind_direction_degree = results_0_daily_0["wind_direction_degree"];const char* results_0_daily_0_wind_speed = results_0_daily_0["wind_speed"];const char* results_0_daily_0_wind_scale = results_0_daily_0["wind_scale"];const char* results_0_daily_0_humidity = results_0_daily_0["humidity"];JsonObject results_0_daily_1 = results_0_daily[1];const char* results_0_daily_1_date = results_0_daily_1["date"];const char* results_0_daily_1_text_day = results_0_daily_1["text_day"];const char* results_0_daily_1_code_day = results_0_daily_1["code_day"];const char* results_0_daily_1_text_night = results_0_daily_1["text_night"]; const char* results_0_daily_1_code_night = results_0_daily_1["code_night"]; const char* results_0_daily_1_high = results_0_daily_1["high"];const char* results_0_daily_1_low = results_0_daily_1["low"]; const char* results_0_daily_1_rainfall = results_0_daily_1["rainfall"]; const char* results_0_daily_1_precip = results_0_daily_1["precip"]; const char* results_0_daily_1_wind_direction = results_0_daily_1["wind_direction"];const char* results_0_daily_1_wind_direction_degree = results_0_daily_1["wind_direction_degree"]; const char* results_0_daily_1_wind_speed = results_0_daily_1["wind_speed"];const char* results_0_daily_1_wind_scale = results_0_daily_1["wind_scale"];const char* results_0_daily_1_humidity = results_0_daily_1["humidity"]; JsonObject results_0_daily_2 = results_0_daily[2];const char* results_0_daily_2_date = results_0_daily_2["date"];const char* results_0_daily_2_text_day = results_0_daily_2["text_day"];const char* results_0_daily_2_code_day = results_0_daily_2["code_day"];const char* results_0_daily_2_text_night = results_0_daily_2["text_night"];const char* results_0_daily_2_code_night = results_0_daily_2["code_night"];const char* results_0_daily_2_high = results_0_daily_2["high"]; const char* results_0_daily_2_low = results_0_daily_2["low"]; const char* results_0_daily_2_rainfall = results_0_daily_2["rainfall"];const char* results_0_daily_2_precip = results_0_daily_2["precip"]; const char* results_0_daily_2_wind_direction = results_0_daily_2["wind_direction"]; const char* results_0_daily_2_wind_direction_degree = results_0_daily_2["wind_direction_degree"]; const char* results_0_daily_2_wind_speed = results_0_daily_2["wind_speed"];const char* results_0_daily_2_wind_scale = results_0_daily_2["wind_scale"]; const char* results_0_daily_2_humidity = results_0_daily_2["humidity"]; const char* results_0_last_update = results_0["last_update"]; // 从以上信息中摘选几个通过串口监视器显示String results_0_daily_0_date_str = results_0_daily_0["date"].as<String>();String  results_0_daily_0_text_day_str = results_0_daily_0["text_day"].as<String>(); int results_0_daily_0_code_day_int = results_0_daily_0["code_day"].as<int>(); String results_0_daily_0_text_night_str = results_0_daily_0["text_night"].as<String>(); int results_0_daily_0_code_night_int = results_0_daily_0["code_night"].as<int>(); int results_0_daily_0_high_int = results_0_daily_0["high"].as<int>();int results_0_daily_0_low_int = results_0_daily_0["low"].as<int>();String results_0_last_update_str = results_0["last_update"].as<String>();int results_0_daily_1_high_int = results_0_daily_1["high"].as<int>();int results_0_daily_1_low_int = results_0_daily_1["low"].as<int>();String results_0_daily_1_text_day_str = results_0_daily_1["text_day"].as<String>();Serial.println(F("======Today Weahter ======="));Serial.print(F("DATE: "));Serial.println(results_0_daily_0_date_str);Serial.print(F("Day Weather: "));Serial.print(results_0_daily_0_text_day_str);Serial.print(F(" "));Serial.println(results_0_daily_0_code_day_int);Serial.print(F("Night Weather: "));Serial.print(results_0_daily_0_text_night_str);Serial.print(F(" "));Serial.println(results_0_daily_0_code_night_int);Serial.print(F("High: "));Serial.println(results_0_daily_0_high_int);Serial.print(F("LOW: "));Serial.println(results_0_daily_0_low_int);Serial.print(F("Last Update: "));Serial.println(results_0_last_update_str);Serial.println(F("=============================="));// display_1(results_0_daily_1_high_int,results_0_daily_1_low_int,results_0_daily_1_text_day_str);results_0_daily_1_high_int_old=results_0_daily_1_high_int;results_0_daily_1_low_int_old=results_0_daily_1_low_int;results_0_daily_1_text_day_str_old=results_0_daily_1_text_day_str;
}else{// display_1(results_0_daily_1_high_int_old,results_0_daily_1_low_int_old,results_0_daily_1_text_day_str_old);
}}

结果：

代码二（有预测）:

#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <string.h>
#include <WiFiMulti.h>
#include <ArduinoJson.h>void TandW();
void httpRequest(String reqRes,int stat);
void connectWiFi();
void parseInfo_now(WiFiClient client,int i);
void parseInfo_fut(WiFiClient client,int i);unsigned int localPort = 8888; // 用于侦听UDP数据包的本地端口
WiFiClient clientNULL;//网络校时的相关配置
static const char ntpServerName[] = "ntp1.aliyun.com"; //NTP服务器，使用阿里云
int timeZone = 8; //时区设置，采用东8区//保存断网前的最新数据
int results_0_now_temperature_int_old;
String results_0_now_text_str_old;
int results_0_daily_1_high_int_old;
int results_0_daily_1_low_int_old;
String results_0_daily_1_text_day_str_old;//----------WIFI连接配置----------
const char* ssid     = "your ssid";       // 连接WiFi名（此处使用XXX为示例）
const char* password = "your password";          // 连接WiFi密码（此处使用12345678为示例）// 请将您需要连接的WiFi密码填入引号中
//----------天气API配置----------
const char* host = "api.seniverse.com";   // 将要连接的服务器地址
const int httpPort = 80;              // 将要连接的服务器端口      // 心知天气HTTP请求所需信息
String reqUserKey = "your secret key";   // 私钥
String reqLocation = "jiujiang";            // 城市
String reqUnit = "c";
WiFiMulti wifiMulti;
WiFiClient client;void setup() {Serial.begin(115200);   connectWiFi();}void loop() {TandW();delay(5000);}void TandW(){String reqRes = "/v3/weather/daily.json?key=" + reqUserKey ++ "&location=" + reqLocation + "&language=en&unit=" +reqUnit+"&start=0&days=3";// 向心知天气服务器服务器请求信息并对信息进行解析httpRequest(reqRes,1);//延迟，需要低于20次/分钟delay(5000);
}
// 向心知天气服务器服务器请求信息并对信息进行解析
void httpRequest(String reqRes,int stat){WiFiClient client;// 建立http请求信息String httpRequest = String("GET ") + reqRes + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "Connection: close\r\n\r\n";Serial.println(""); Serial.print("Connecting to "); Serial.print(host);// 尝试连接服务器if (client.connect(host, 80)){Serial.println(" Success!");// 向服务器发送http请求信息client.print(httpRequest);Serial.println("Sending request: ");Serial.println(httpRequest);  // 获取并显示服务器响应状态行 String status_response = client.readStringUntil('\n');Serial.print("status_response: ");Serial.println(status_response);// 使用find跳过HTTP响应头if (client.find("\r\n\r\n")) {Serial.println("Found Header End. Start Parsing.");}if (stat == 0){// 利用ArduinoJson库解析心知天气响应信息(实时数据)parseInfo_now(client,1); }else if(stat == 1){parseInfo_fut(client,1);}}else {Serial.println(" connection failed!");if (stat == 0){// 利用ArduinoJson库解析心知天气响应信息(实时数据)parseInfo_now(clientNULL,0); }else if(stat == 1){parseInfo_fut(clientNULL,0);}}//断开客户端与服务器连接工作client.stop();
}
// 连接WiFi
void connectWiFi(){WiFi.begin(ssid, password);                  // 启动网络连接Serial.print("Connecting to ");              // 串口监视器输出网络连接信息Serial.print(ssid); Serial.println(" ...");  // 告知用户NodeMCU正在尝试WiFi连接int i = 0;                                   // 这一段程序语句用于检查WiFi是否连接成功while (WiFi.status() != WL_CONNECTED) {      // WiFi.status()函数的返回值是由NodeMCU的WiFi连接状态所决定的。 delay(1000);                               // 如果WiFi连接成功则返回值为WL_CONNECTED                       Serial.print(i++); Serial.print(' ');      // 此处通过While循环让NodeMCU每隔一秒钟检查一次WiFi.status()函数返回值}                                            // 同时NodeMCU将通过串口监视器输出连接时长读秒。// 这个读秒是通过变量i每隔一秒自加1来实现的。                                              Serial.println("");                          // WiFi连接成功后Serial.println("Connection established!");   // NodeMCU将通过串口监视器输出"连接成功"信息。Serial.print("IP address:    ");             // 同时还将输出NodeMCU的IP地址。这一功能是通过调用Serial.println(WiFi.localIP());              // WiFi.localIP()函数来实现的。该函数的返回值即NodeMCU的IP地址。
}
// 利用ArduinoJson库解析心知天气响应信息(实时)
void parseInfo_now(WiFiClient client,int i){if(i==1){const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_OBJECT_SIZE(1) + 2*JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 230;DynamicJsonDocument doc(capacity);deserializeJson(doc, client);JsonObject results_0 = doc["results"][0];JsonObject results_0_now = results_0["now"];const char* results_0_now_text = results_0_now["text"]; // "Sunny"const char* results_0_now_code = results_0_now["code"]; // "0"const char* results_0_now_temperature = results_0_now["temperature"]; // "32"const char* results_0_last_update = results_0["last_update"]; // "2020-06-02T14:40:00+08:00" // 通过串口监视器显示以上信息String results_0_now_text_str = results_0_now["text"].as<String>(); int results_0_now_code_int = results_0_now["code"].as<int>(); int results_0_now_temperature_int = results_0_now["temperature"].as<int>(); String results_0_last_update_str = results_0["last_update"].as<String>();   Serial.println(F("======Weahter Now======="));Serial.print(F("Weather Now: "));Serial.print(results_0_now_text_str);Serial.print(F(" "));Serial.println(results_0_now_code_int);Serial.print(F("Temperature: "));Serial.println(results_0_now_temperature_int);Serial.print(F("Last Update: "));Serial.println(results_0_last_update_str);Serial.println(F("========================"));//display_0(results_0_now_temperature_int,results_0_now_text_str);results_0_now_text_str_old = results_0_now_text_str;results_0_now_temperature_int_old = results_0_now_temperature_int;}else{//display_0(results_0_now_temperature_int_old,results_0_now_text_str_old);}}
// 利用ArduinoJson库解析心知天气响应信息(预测)
void parseInfo_fut(WiFiClient client,int i){if(i==1){const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_ARRAY_SIZE(3) + JSON_OBJECT_SIZE(1) + JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 3*JSON_OBJECT_SIZE(14) + 860;DynamicJsonDocument doc(capacity);deserializeJson(doc, client);JsonObject results_0 = doc["results"][0];JsonArray results_0_daily = results_0["daily"];JsonObject results_0_daily_0 = results_0_daily[0];const char* results_0_daily_0_date = results_0_daily_0["date"]; const char* results_0_daily_0_text_day = results_0_daily_0["text_day"]; const char* results_0_daily_0_code_day = results_0_daily_0["code_day"];const char* results_0_daily_0_text_night = results_0_daily_0["text_night"]; const char* results_0_daily_0_code_night = results_0_daily_0["code_night"]; const char* results_0_daily_0_high = results_0_daily_0["high"];const char* results_0_daily_0_low = results_0_daily_0["low"]; const char* results_0_daily_0_rainfall = results_0_daily_0["rainfall"];const char* results_0_daily_0_precip = results_0_daily_0["precip"]; const char* results_0_daily_0_wind_direction = results_0_daily_0["wind_direction"]; const char* results_0_daily_0_wind_direction_degree = results_0_daily_0["wind_direction_degree"];const char* results_0_daily_0_wind_speed = results_0_daily_0["wind_speed"];const char* results_0_daily_0_wind_scale = results_0_daily_0["wind_scale"];const char* results_0_daily_0_humidity = results_0_daily_0["humidity"];JsonObject results_0_daily_1 = results_0_daily[1];const char* results_0_daily_1_date = results_0_daily_1["date"];const char* results_0_daily_1_text_day = results_0_daily_1["text_day"];const char* results_0_daily_1_code_day = results_0_daily_1["code_day"];const char* results_0_daily_1_text_night = results_0_daily_1["text_night"]; const char* results_0_daily_1_code_night = results_0_daily_1["code_night"]; const char* results_0_daily_1_high = results_0_daily_1["high"];const char* results_0_daily_1_low = results_0_daily_1["low"]; const char* results_0_daily_1_rainfall = results_0_daily_1["rainfall"]; const char* results_0_daily_1_precip = results_0_daily_1["precip"]; const char* results_0_daily_1_wind_direction = results_0_daily_1["wind_direction"];const char* results_0_daily_1_wind_direction_degree = results_0_daily_1["wind_direction_degree"]; const char* results_0_daily_1_wind_speed = results_0_daily_1["wind_speed"];const char* results_0_daily_1_wind_scale = results_0_daily_1["wind_scale"];const char* results_0_daily_1_humidity = results_0_daily_1["humidity"]; JsonObject results_0_daily_2 = results_0_daily[2];const char* results_0_daily_2_date = results_0_daily_2["date"];const char* results_0_daily_2_text_day = results_0_daily_2["text_day"];const char* results_0_daily_2_code_day = results_0_daily_2["code_day"];const char* results_0_daily_2_text_night = results_0_daily_2["text_night"];const char* results_0_daily_2_code_night = results_0_daily_2["code_night"];const char* results_0_daily_2_high = results_0_daily_2["high"]; const char* results_0_daily_2_low = results_0_daily_2["low"]; const char* results_0_daily_2_rainfall = results_0_daily_2["rainfall"];const char* results_0_daily_2_precip = results_0_daily_2["precip"]; const char* results_0_daily_2_wind_direction = results_0_daily_2["wind_direction"]; const char* results_0_daily_2_wind_direction_degree = results_0_daily_2["wind_direction_degree"]; const char* results_0_daily_2_wind_speed = results_0_daily_2["wind_speed"];const char* results_0_daily_2_wind_scale = results_0_daily_2["wind_scale"]; const char* results_0_daily_2_humidity = results_0_daily_2["humidity"]; const char* results_0_last_update = results_0["last_update"]; // 从以上信息中摘选几个通过串口监视器显示String results_0_daily_0_date_str = results_0_daily_0["date"].as<String>();String  results_0_daily_0_text_day_str = results_0_daily_0["text_day"].as<String>(); int results_0_daily_0_code_day_int = results_0_daily_0["code_day"].as<int>(); String results_0_daily_0_text_night_str = results_0_daily_0["text_night"].as<String>(); int results_0_daily_0_code_night_int = results_0_daily_0["code_night"].as<int>(); int results_0_daily_0_high_int = results_0_daily_0["high"].as<int>();int results_0_daily_0_low_int = results_0_daily_0["low"].as<int>();String results_0_last_update_str = results_0["last_update"].as<String>();int results_0_daily_1_high_int = results_0_daily_1["high"].as<int>();int results_0_daily_1_low_int = results_0_daily_1["low"].as<int>();String results_0_daily_1_text_day_str = results_0_daily_1["text_day"].as<String>();Serial.println(F("======Today Weahter ======="));Serial.print(F("DATE: "));Serial.println(results_0_daily_0_date_str);Serial.print(F("Day Weather: "));Serial.print(results_0_daily_0_text_day_str);Serial.print(F(" "));Serial.println(results_0_daily_0_code_day_int);Serial.print(F("Night Weather: "));Serial.print(results_0_daily_0_text_night_str);Serial.print(F(" "));Serial.println(results_0_daily_0_code_night_int);Serial.print(F("High: "));Serial.println(results_0_daily_0_high_int);Serial.print(F("LOW: "));Serial.println(results_0_daily_0_low_int);Serial.print(F("Last Update: "));Serial.println(results_0_last_update_str);Serial.println(F("=============================="));// display_1(results_0_daily_1_high_int,results_0_daily_1_low_int,results_0_daily_1_text_day_str);results_0_daily_1_high_int_old=results_0_daily_1_high_int;results_0_daily_1_low_int_old=results_0_daily_1_low_int;results_0_daily_1_text_day_str_old=results_0_daily_1_text_day_str;
}else{// display_1(results_0_daily_1_high_int_old,results_0_daily_1_low_int_old,results_0_daily_1_text_day_str_old);
}}

结果：

代码三（自己写的-有预测）：

#include <Arduino.h>
#include <WiFi.h>
#include <HTTPClient.h>
#include <string.h>
#include <WiFiMulti.h>
#include <ArduinoJson.h>void TandW();
void httpRequest(String reqRes,int stat);
void connectWiFi();//----------WIFI连接配置----------
const char* ssid     = "your ssid";       // 连接WiFi名（此处使用XXX为示例）
const char* password = "your password";          // 连接WiFi密码（此处使用12345678为示例）// 请将您需要连接的WiFi密码填入引号中
//----------天气API配置----------
const char* host = "api.seniverse.com";   // 将要连接的服务器地址
const int httpPort = 80;              // 将要连接的服务器端口      // 心知天气HTTP请求所需信息
String reqUserKey = "your secret key";   // 私钥
String reqLocation = "jiujiang";            // 城市
String reqUnit = "c";    WiFiClient client;void setup() {Serial.begin(115200);   connectWiFi();}void loop() {TandW();delay(5000);}void TandW(){String reqRes = "/v3/weather/daily.json?key=" + reqUserKey ++ "&location=" + reqLocation + "&language=en&unit=" +reqUnit+"&start=0&days=3";// 向心知天气服务器服务器请求信息并对信息进行解析httpRequest(reqRes,0);//延迟，需要低于20次/分钟delay(5000);
}
// 向心知天气服务器服务器请求信息并对信息进行解析
void httpRequest(String reqRes,int stat){WiFiClient client;// 建立http请求信息String httpRequest = String("GET ") + reqRes + " HTTP/1.1\r\n" + "Host: " + host + "\r\n" + "Connection: close\r\n\r\n";Serial.println(""); Serial.print("Connecting to "); Serial.print(host);// 尝试连接服务器if (client.connect(host, 80)){Serial.println(" Success!");// 向服务器发送http请求信息client.print(httpRequest);Serial.println("Sending request: ");Serial.println(httpRequest);  // 获取并显示服务器响应状态行 String status_response = client.readStringUntil('\n');Serial.print("status_response: ");Serial.println(status_response);// 使用find跳过HTTP响应头if (client.find("\r\n\r\n")) {Serial.println("Found Header End. Start Parsing.");}const size_t capacity = JSON_ARRAY_SIZE(1) + JSON_ARRAY_SIZE(3) + JSON_OBJECT_SIZE(1) + JSON_OBJECT_SIZE(3) + JSON_OBJECT_SIZE(6) + 3*JSON_OBJECT_SIZE(14) + 860;DynamicJsonDocument doc(capacity);deserializeJson(doc, client);JsonObject results_0 = doc["results"][0];JsonArray results_0_now = results_0["daily"];JsonObject results_0_now_1 = results_0_now[1];//0为当天的日期，1为明天的日期const char* results_0_now_text = results_0_now_1["date"]; Serial.println(results_0_now_text);}else {Serial.println(" connection failed!");}//断开客户端与服务器连接工作client.stop();
}
// 连接WiFi
void connectWiFi(){WiFi.begin(ssid, password);                  // 启动网络连接Serial.print("Connecting to ");              // 串口监视器输出网络连接信息Serial.print(ssid); Serial.println(" ...");  // 告知用户NodeMCU正在尝试WiFi连接int i = 0;                                   // 这一段程序语句用于检查WiFi是否连接成功while (WiFi.status() != WL_CONNECTED) {      // WiFi.status()函数的返回值是由NodeMCU的WiFi连接状态所决定的。 delay(1000);                               // 如果WiFi连接成功则返回值为WL_CONNECTED                       Serial.print(i++); Serial.print(' ');      // 此处通过While循环让NodeMCU每隔一秒钟检查一次WiFi.status()函数返回值}                                            // 同时NodeMCU将通过串口监视器输出连接时长读秒。// 这个读秒是通过变量i每隔一秒自加1来实现的。                                              Serial.println("");                          // WiFi连接成功后Serial.println("Connection established!");   // NodeMCU将通过串口监视器输出"连接成功"信息。Serial.print("IP address:    ");             // 同时还将输出NodeMCU的IP地址。这一功能是通过调用Serial.println(WiFi.localIP());              // WiFi.localIP()函数来实现的。该函数的返回值即NodeMCU的IP地址。
}

四.扩展知识

JSON数据解析：

博客：使用ESP8266配合ArduinoJson库来解析JSON信息_json_array_size_20161201的博客-CSDN博客

arduino JSON数据信息解析_一入极客深似海的博客-CSDN博客

json就是用[]一层套一层

JsonObject results_0 = doc["results"][0];JsonArray results_0_daily = results_0["daily"];JsonObject results_0_daily_0 = results_0_daily[0];const char* results_0_daily_0_date = results_0_daily_0["date"]; const char* results_0_daily_0_text_day = results_0_daily_0["text_day"]; const char* results_0_daily_0_code_day = results_0_daily_0["code_day"];const char* results_0_daily_0_text_night = results_0_daily_0["text_night"]; const char* results_0_daily_0_code_night = results_0_daily_0["code_night"]; const char* results_0_daily_0_high = results_0_daily_0["high"];const char* results_0_daily_0_low = results_0_daily_0["low"]; const char* results_0_daily_0_rainfall = results_0_daily_0["rainfall"];const char* results_0_daily_0_precip = results_0_daily_0["precip"]; const char* results_0_daily_0_wind_direction = results_0_daily_0["wind_direction"]; const char* results_0_daily_0_wind_direction_degree = results_0_daily_0["wind_direction_degree"];const char* results_0_daily_0_wind_speed = results_0_daily_0["wind_speed"];const char* results_0_daily_0_wind_scale = results_0_daily_0["wind_scale"];const char* results_0_daily_0_humidity = results_0_daily_0["humidity"];JsonObject results_0_daily_1 = results_0_daily[1];const char* results_0_daily_1_date = results_0_daily_1["date"];const char* results_0_daily_1_text_day = results_0_daily_1["text_day"];const char* results_0_daily_1_code_day = results_0_daily_1["code_day"];const char* results_0_daily_1_text_night = results_0_daily_1["text_night"]; const char* results_0_daily_1_code_night = results_0_daily_1["code_night"]; const char* results_0_daily_1_high = results_0_daily_1["high"];const char* results_0_daily_1_low = results_0_daily_1["low"]; const char* results_0_daily_1_rainfall = results_0_daily_1["rainfall"]; const char* results_0_daily_1_precip = results_0_daily_1["precip"]; const char* results_0_daily_1_wind_direction = results_0_daily_1["wind_direction"];const char* results_0_daily_1_wind_direction_degree = results_0_daily_1["wind_direction_degree"]; const char* results_0_daily_1_wind_speed = results_0_daily_1["wind_speed"];const char* results_0_daily_1_wind_scale = results_0_daily_1["wind_scale"];const char* results_0_daily_1_humidity = results_0_daily_1["humidity"]; JsonObject results_0_daily_2 = results_0_daily[2];const char* results_0_daily_2_date = results_0_daily_2["date"];const char* results_0_daily_2_text_day = results_0_daily_2["text_day"];const char* results_0_daily_2_code_day = results_0_daily_2["code_day"];const char* results_0_daily_2_text_night = results_0_daily_2["text_night"];const char* results_0_daily_2_code_night = results_0_daily_2["code_night"];const char* results_0_daily_2_high = results_0_daily_2["high"]; const char* results_0_daily_2_low = results_0_daily_2["low"]; const char* results_0_daily_2_rainfall = results_0_daily_2["rainfall"];const char* results_0_daily_2_precip = results_0_daily_2["precip"]; const char* results_0_daily_2_wind_direction = results_0_daily_2["wind_direction"]; const char* results_0_daily_2_wind_direction_degree = results_0_daily_2["wind_direction_degree"]; const char* results_0_daily_2_wind_speed = results_0_daily_2["wind_speed"];const char* results_0_daily_2_wind_scale = results_0_daily_2["wind_scale"]; const char* results_0_daily_2_humidity = results_0_daily_2["humidity"]; const char* results_0_last_update = results_0["last_update"];

看上面的博客，上面的这段代码结合图片也就懂了。

参考博客：利用ESP8266+OLED（I2C）打造智能时钟（网络校时+实时天气+天气预报）_esp8266oled制作天气时钟_下雪还是下雨的博客-CSDN博客

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ESP32学习之JSON,和接入心知天气

怎么接入？