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- Update record of this article 2023-10-21
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- 1 Introduction
- 2. Related code
1. Preface
When getting weather information from Zephyr Weather, since Zephyr Weather uses Gzip compression to return the data stream, the returned data needs to be decompressed.
By default, the Zephyr Weather Free Key has been applied for
https://dev.qweather.com/docs/api/weather/weather-now/
And there happens to be an Arduino library for this function,
https://github.com/tignioj/ArduinoUZlib
2. Related code
Zefeng Weather API uses HTTPS to obtain relevant weather data, and the returned data uses GZIP compression.
After obtaining the data, use the int result=ArduinoUZlib::decompress(inbuff, size, outbuf,outsize); function in the UZlib library to decompress it.
HeFeng.h code
#pragma once
#include <ArduinoJson.h>
typedef struct HeFengCurrentData {<!-- -->
String cond_txt;
String fl;
String tmp;
String hum;
String wind_sc;
String iconMeteCon;
}
HeFengCurrentData;
typedef struct HeFengForeData {<!-- -->
String dateStr;
String tmp_min;
String tmp_max;
String iconMeteCon;
}
HeFengForeData;
class HeFeng {<!-- -->
private:
String getMeteConIcon(String cond_code);
bool fetchBuffer(const char* url);
static uint8_t _buffer[1024 * 3]; //gzip stream maximum buffer
static size_t _bufferSize;
public:
HeFeng();
void doUpdateCurr(HeFengCurrentData *data, String key, String location);
void doUpdateFore(HeFengForeData *data, String key, String location);
};
</code><img class="look-more-preCode contentImg-no-view" src="//i2.wp.com/csdnimg.cn/release/blogv2/dist/pc/img/newCodeMoreBlack. png" alt="" title="">
HeFeng.cpp code
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClientSecureBearSSL.h>
#include "ArduinoUZlib.h" // gzip library
#include "HeFeng.h"
uint8_t HeFeng::_buffer[1024 * 3];
size_t HeFeng::_bufferSize = 0;
HeFeng::HeFeng() {<!-- -->
}
bool HeFeng::fetchBuffer(const char *url)
{<!-- -->
_bufferSize = 0;
std::unique_ptr<WiFiClientSecure> client(new WiFiClientSecure);
client->setInsecure();
HTTPClient https;
Serial.print("[HTTPS] begin...now\\
");
if (https.begin(*client, url))
{<!-- -->
https.addHeader("Accept-Encoding", "gzip");
https.setUserAgent("Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0");
int httpCode = https.GET();
if (httpCode > 0)
{<!-- -->
if (httpCode == HTTP_CODE_OK)
{<!-- -->
int len = https.getSize(); // get length of document (is -1 when Server sends no Content-Length header)
static uint8_t buff[128 * 1] = {<!-- -->0}; // create buffer for read
int offset = 0; // read all data from server
while (https.connected() & amp; & amp; (len > 0 || len == -1))
{<!-- -->
size_t size = client->available(); // get available data size
if(size)
{<!-- -->
int c = client->readBytes(buff, ((size > sizeof(buff)) ? sizeof(buff) : size));
memcpy(_buffer + offset, buff, sizeof(uint8_t) * c);
offset + = c;
if (len > 0)
{<!-- -->
len -= c;
}
}
delay(1);
}
_bufferSize = offset;
}
}
else
{<!-- -->
Serial.printf("[HTTPS] GET... failed, error: %s\\
", https.errorToString(httpCode).c_str());
}
https.end();
}else{<!-- -->
Serial.printf("Unable to connect\\
");
}
Serial.print("[HTTPS] end...now\\
");
return _bufferSize > 0;
}
void HeFeng::doUpdateCurr(HeFengCurrentData *data, String key, String location) {<!-- --> //Get the weather
String url = "https://devapi.qweather.com/v7/weather/now?lang=en & amp;gzip=n & amp;location=" + location + " & amp;key=" + key;
Serial.print("[HTTPS] begin...now\\
");
fetchBuffer(url.c_str()); // HTTPS gets the data stream
if (_bufferSize){<!-- -->
Serial.print("bufferSize:");
Serial.println(_bufferSize, DEC);
uint8_t *outBuf=NULL;
size_t outLen = 0;
ArduinoUZlib::decompress(_buffer, _bufferSize, outBuf, outLen); // GZIP decompression
// Output the decrypted data to the console.
Serial.write(outBuf,outLen);
if(outBuf & amp; & amp; outLen){<!-- -->
DynamicJsonDocument jsonBuffer(2048);
deserializeJson(jsonBuffer, (char*)outBuf,outLen);
JsonObject root = jsonBuffer.as<JsonObject>();
String tmp = root["now"]["temp"];//Temperature
data->tmp = tmp;
String fl = root["now"]["feelsLike"];//Feeling temperature
data->fl = fl;
String hum = root["now"]["humidity"];//Humidity
data->hum = hum;
String wind_sc = root["now"]["windScale"];//wind power
data->wind_sc = wind_sc;
String cond_code = root["now"]["icon"];//Weather icon
String meteConIcon = getMeteConIcon(cond_code);
String cond_txt = root["now"]["text"];//Weather
data->cond_txt = cond_txt;
data->iconMeteCon = meteConIcon;
jsonBuffer.clear();
} else {<!-- -->
Serial.println("doUpdateCurr failed");
data->tmp = "-1";
data->fl = "-1";
data->hum = "-1";
data->wind_sc = "-1";
data->cond_txt = "no network";
data->iconMeteCon = ")";
}
//Be sure to remember to release memory
if(outBuf != NULL) {<!-- -->
free(outBuf);
outBuf=NULL;
}
_bufferSize = 0;
}
}
void HeFeng::doUpdateFore(HeFengForeData *data, String key, String location) {<!-- --> //Get the forecast
String url = "https://devapi.qweather.com/v7/weather/3d?lang=en & amp;gzip=n & amp;location=" + location + " & amp;key=" + key;
Serial.print("[HTTPS] begin...forecast\\
");
fetchBuffer(url.c_str()); // HTTPS gets the data stream
if (_bufferSize){<!-- -->
Serial.print("bufferSize:");
Serial.println(_bufferSize, DEC);
uint8_t *outBuf=NULL;
size_t outLen = 0;
ArduinoUZlib::decompress(_buffer, _bufferSize, outBuf, outLen); // GZIP decompression
// Output the decrypted data to the console.
Serial.write(outBuf,outLen);
if(outBuf & amp; & amp; outLen){<!-- -->
DynamicJsonDocument jsonBuffer(2048);
deserializeJson(jsonBuffer, (char*)outBuf,outLen);
JsonObject root = jsonBuffer.as<JsonObject>();
int i;
for (i = 0; i < 3; i + + ) {<!-- -->
String dateStr = root["daily"][i]["fxDate"];
data[i].dateStr = dateStr.substring(5, dateStr.length());
String tmp_min = root["daily"][i]["tempMin"];
data[i].tmp_min = tmp_min;
String tmp_max = root["daily"][i]["tempMax"];
data[i].tmp_max = tmp_max;
String cond_code = root["daily"][i]["iconDay"];
String meteConIcon = getMeteConIcon(cond_code);
data[i].iconMeteCon = meteConIcon;
}
jsonBuffer.clear();
} else {<!-- -->
int i;
for (i = 0; i < 3; i + + ) {<!-- -->
data[i].tmp_min = "-1";
data[i].tmp_max = "-1";
data[i].dateStr = "N/A";
data[i].iconMeteCon = ")";
}
}
//Be sure to remember to release memory
if(outBuf != NULL) {<!-- -->
free(outBuf);
outBuf=NULL;
}
_bufferSize = 0;
}
}
String HeFeng::getMeteConIcon(String cond_code) {<!-- --> //Get the weather icon. See https://dev.qweather.com/docs/start/icons/
if (cond_code == "100" || cond_code == "150" || cond_code == "9006") {<!-- -->//clear Sunny/Clear
return "B";
}
if (cond_code == "101") {<!-- -->//Cloudy Cloudy
return "Y";
}
if (cond_code == "102") {<!-- -->//Shaoyun Few Clouds
return "N";
}
if (cond_code == "103" || cond_code == "153") {<!-- -->//Partly Cloudy/
return "H";
}
if (cond_code == "104" || cond_code == "154") {<!-- -->//Yin Overcast
return "D";
}
if (cond_code == "300" || cond_code == "301") {<!-- -->//Shower Rain 301-Heavy Shower Rain
return "T";
}
if (cond_code == "302" || cond_code == "303") {<!-- -->//302-Thundershower Thundershower / 303-Strong Thundershower
return "P";
}
if (cond_code == "304" || cond_code == "313" || cond_code == "404" || cond_code == "405" || cond_code == "406" ) {<!-- -->
//304-Thundershowers with hail Freezing Rain
//313-Freezing Rain Freezing Rain
//404-Sleet Sleet
//405-Rain And Snow Rain And Snow
//406- Shower Snow
return "X";
}
if (cond_code == "305" || cond_code == "308" || cond_code == "309" || cond_code == "314" || cond_code == "399" ) {<!-- -->
//305-小雨Light Rain
//308-Extreme Rain Extreme Rain
//309-Drizzle/Drizzle Drizzle Rain
//314-Light to moderate rain Light to moderate rain
//399-Rain Light to moderate rain
return "Q";
}
if (cond_code == "306" || cond_code == "307" || cond_code == "310" || cond_code == "311" || cond_code == "312" || cond_code == "315" || cond_code == "316" || cond_code == "317" || cond_code == "318") {<!-- -->
//306-Moderate Rain Moderate Rain
//307-Heavy Rain Heavy Rain
//310-Heavy rainstorm
//311-Heavy Storm Heavy Storm
//312-Severe Storm
//315-Moderate to heavy rain Moderate to heavy rain
//316-Heavy rain to storm
//317-Storm to heavy storm Storm to heavy storm
//318-Heavy to severe storm Heavy to severe storm
return "R";
}
if (cond_code == "400" || cond_code == "408") {<!-- -->
//400-Light Snow
//408-Light to moderate snow Light to moderate snow
return "U";
}
if (cond_code == "401" || cond_code == "402" || cond_code == "403" || cond_code == "409" || cond_code == "410" ) {<!-- -->
//401-Moderate Snow
//402-Heavy Snow Heavy Snow
//403-Blizzard Snowstorm
//409-Moderate to heavy snow Moderate to heavy snow
//410-Heavy snow to snowstorm
return "W";
}
if (cond_code == "407") {<!-- -->
//407-Snow Flurry
return "V";
}
if (cond_code == "499" || cond_code == "901") {<!-- -->
//499-Snow Snow
//901-Cold Cold
return "G";
}
if (cond_code == "500") {<!-- -->
//500-Mist Mist
return "E";
}
if (cond_code == "501" || cond_code == "509" || cond_code == "510" || cond_code == "514" || cond_code == "515" ) {<!-- -->
//501-Foggy
return "M";
}
if (cond_code == "502" || cond_code == "511" || cond_code == "512" || cond_code == "513") {<!-- -->
//502-Haze Haze
return "L";
}
if (cond_code == "503" || cond_code == "504" || cond_code == "507" || cond_code == "508") {<!-- -->
//503-Sand
return "F";
}
if (cond_code == "999") {<!-- -->//Unknown
return ")";
}
if (cond_code == "213") {<!-- -->
return "O";
}
if (cond_code == "200" || cond_code == "201" || cond_code == "202" || cond_code == "203" || cond_code == "204" || cond_code == "205" || cond_code == "206" || cond_code == "207" || cond_code == "208" || cond_code == "209" || cond_code == "210" || cond_code == "211" || cond_code == "212") {<!-- -->
return "S";
}
return ")";
}
</code><img class="look-more-preCode contentImg-no-view" src="//i2.wp.com/csdnimg.cn/release/blogv2/dist/pc/img/newCodeMoreBlack. png" alt="" title="">