ESP32_HTTP请求获取天气，含json解析
//安装 [email protected]
#include "WiFi.h"
#include "HTTPClient.h"
#include "ArduinoJson.h"
//**********宏、常量********************
//WIFI名和密码
const char *ssid = ""; //SSID
const char *password = ""; //PASSWORD
//心知天气配置
const char *private_key = "SJo8p9FiiIu6gDNz4"; //私钥
const char *city = "guangzhou"; //查询的城市
const char *day = "3"; //查询几日内的天气（免费用户最多可查3日）
//**********全局变量********************
String http_req; //http请求
String http_rsp; //http应答
HTTPClient http_client;
DynamicJsonDocument doc(2048); //json
//***********函数声明*******************
void WIFI_Config(void); //连接WIFI
void set_weather_httpclient(void);//设置获取天气的接口
void anylasize_weather_json(String jsonStr);
//***********初始化*********************
void setup()
{
Serial.begin(115200);
WIFI_Config();
set_weather_httpclient();
}
//***********循环************************
void loop()
{
int http_code = http_client.GET();
if (http_code == HTTP_CODE_OK) {
http_rsp = http_client.getString();
Serial.println(http_rsp); //打印原始的http响应
anylasize_weather_json(http_rsp);
while(1);
}else{
Serial.printf("HTTP get code: %d\n", http_code);
}
delay(5000);
}
//***********函数实现*******************
//连接WIFI
void WIFI_Config()
{
Serial.println("connecting WIFI");
WiFi.begin(ssid, password);
while (!WiFi.isConnected()){ //等待连接
Serial.print(".");
delay(500);
}
Serial.println("Wifi connected\n"); //连接成功
}
//设置获取天气的接口
void set_weather_httpclient()
{
http_req = (String)"https://api.seniverse.com/v3/weather/daily.json?key=" + private_key ;
http_req += (String)"&location=" + city + "&language=en&unit=c&start=0&days=" + day;
Serial.println(http_req);
if (http_client.begin(http_req)){
Serial.println("set_weather_httpclient ok.\n");
}
}
//解析JSON字符串
//{"results":[{"location":{"id":"WS0E9D8WN298","name":"Guangzhou","country":"CN","path":"Guangzhou,Guangzhou,Guangdong,China","timezone":"Asia/Shanghai","timezone_offset":"+08:00"},"daily":[{"date":"2023-10-07","text_day":"Overcast","code_day":"9","text_night":"Overcast","code_night":"9","high":"26","low":"20","rainfall":"0.00","precip":"0.00","wind_direction":"N","wind_direction_degree":"2","wind_speed":"21.06","wind_scale":"4","humidity":"73"},{"date":"2023-10-08","text_day":"Overcast","code_day":"9","text_night":"Overcast","code_night":"9","high":"25","low":"21","rainfall":"0.00","precip":"0.00","wind_direction":"NE","wind_direction_degree":"63","wind_speed":"23.94","wind_scale":"4","humidity":"71"},{"date":"2023-10-09","text_day":"Overcast","code_day":"9","text_night":"Overcast","code_night":"9","high":"26","low":"23","rainfall":"0.00","precip":"0.00","wind_direction":"NE","wind_direction_degree":"30","wind_speed":"13.46","wind_scale":"3","humidity":"71"}],"last_update":"2023-10-07T20:00:00+08:00"}]}
void anylasize_weather_json(String jsonStr)
{
int index = jsonStr.indexOf('{'); //找到json的{
jsonStr = jsonStr.substring(index);
deserializeJson(doc, jsonStr); //字符串解析成json格式
JsonObject root = doc.as(); //doc转换成的JsonObject对象root
JsonArray results = root["results"]; //JsonObject对象root里有JsonArray数组results
JsonObject location = results[0]["location"]; //results[0]中的子JsonObject对象location
const char *name = location["name"]; //JsonObject对象location中取出name（城市名） Guangzhou
Serial.println(name);
JsonArray daily = results[0]["daily"]; //results[0]中的JsonArray数组daily
const char *date = daily[0]["date"]; //JsonArray数组daily中[0]的“date”（日期） 2023-10-07
Serial.println(date);
const char *weather = daily[0]["text_day"]; //JsonArray数组daily中[0]的“text_day”（天气） Overcast
Serial.println(weather);
const char *low = daily[0]["low"]; //JsonArray数组daily中[0]的最低和最高气温 temper is 20~26 deg
const char *high = daily[0]["high"];
Serial.println((String)"temper is "+low+"~"+high+" deg");
}
参考：ESP32_HTTP请求获取天气，含json解析_esp32 心知天气_PWRJOY的博客-CSDN博客