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sharandac
2020-07-29 08:08:22 +02:00
parent 82b8277679
commit 2afad2dfcc
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207
src/app/weather/weather_fetch.cpp
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/****************************************************************************
* July 23 00:23:05 2020
* Copyright 2020 Dirk Brosswick
* Email: dirk.brosswick@googlemail.com
****************************************************************************/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <Arduino.h>
#include <WiFi.h>
#include "ArduinoJson.h"
#include "HTTPClient.h"
#include "weather.h"
#include "weather_fetch.h"
#include "weather_forecast.h"
#include "hardware/powermgm.h"
uint32_t weather_fetch_today( weather_config_t *weather_config, weather_forcast_t *weather_today ) {
WiFiClient today_client;
uint32_t retval = -1;
if ( !today_client.connect( OWM_HOST, OWM_PORT ) ) {
Serial.printf( __FILE__ "connection failed\r\n");
return( -1 );
}
today_client.printf( "GET /data/2.5/weather?lat=%s&lon=%s&appid=%s HTTP/1.1\r\n"
"Host: %s\r\n"
"Connection: close\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache\r\n"
"User-Agent: ESP32\r\n"
"Accept: text/html,application/json\r\n\r\n", weather_config->lat, weather_config->lon, weather_config->apikey, OWM_HOST );
uint64_t startMillis = millis();
while ( today_client.available() == 0 ) {
if ( millis() - startMillis > 5000 ) {
Serial.printf( __FILE__ "connection timeout\r\n");
today_client.stop();
return( retval );
}
}
char *json = (char *)ps_malloc( WEATHER_TODAY_BUFFER_SIZE );
if ( json == NULL ) {
Serial.printf( __FILE__ "memory alloc failed\r\n");
today_client.stop();
return( retval );
}
char *ptr = json;
bool data_begin = false;
while( today_client.available() ) {
if ( data_begin ) {
ptr[ today_client.readBytes( ptr, WEATHER_TODAY_BUFFER_SIZE - 1 ) ] = '\0';
}
else if ( today_client.read() == '{' ) {
data_begin = true;
*ptr = '{';
ptr++;
}
}
today_client.stop();
if ( data_begin == false ) {
free( json );
return( retval );
}
today_client.stop();
DynamicJsonDocument doc(20000);
DeserializationError error = deserializeJson( doc, json);
if (error) {
Serial.print(F( __FILE__ "weather today deserializeJson() failed: "));
Serial.println(error.c_str());
doc.clear();
free( json );
return( retval );
}
retval = doc["cod"].as<int>();
if ( retval != 200 ) {
Serial.printf( __FILE__ "get weather failed, returncode: %d\r\n", retval );
doc.clear();
free( json );
return( retval );
}
weather_today->valide = true;
snprintf( weather_today->temp, sizeof( weather_today->temp ),"%0.1f°C", doc["main"]["temp"].as<float>() - 273.15 );
snprintf( weather_today->humidity, sizeof( weather_today->humidity ),"%f%%", doc["main"]["humidity"].as<float>() );
snprintf( weather_today->pressure, sizeof( weather_today->pressure ),"%fpha", doc["main"]["pressure"].as<float>() );
strcpy( weather_today->icon, doc["weather"][0]["icon"] );
strcpy( weather_today->name, doc["name"] );
doc.clear();
free( json );
return( retval );
}
uint32_t weather_fetch_forecast( weather_config_t *weather_config, weather_forcast_t * weather_forecast ) {
WiFiClient forecast_client;
uint32_t retval = -1;
if ( !forecast_client.connect( OWM_HOST, OWM_PORT ) ) {
Serial.printf( __FILE__ "connection failed\r\n");
return( retval );
}
forecast_client.printf( "GET /data/2.5/forecast?cnt=%d&lat=%s&lon=%s&appid=%s HTTP/1.1\r\n"
"Host: %s\r\n"
"Connection: close\r\n"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache\r\n"
"User-Agent: ESP32\r\n"
"Accept: text/html,application/json\r\n\r\n", WEATHER_MAX_FORECAST, weather_config->lat, weather_config->lon, weather_config->apikey, OWM_HOST );
uint64_t startMillis = millis();
while ( forecast_client.available() == 0 ) {
if ( millis() - startMillis > 5000 ) {
Serial.printf( __FILE__ "connection timeout\r\n");
forecast_client.stop();
return( retval );
}
}
char *json = (char *)ps_malloc( WEATHER_FORECAST_BUFFER_SIZE );
if ( json == NULL ) {
Serial.printf( __FILE__ "memory alloc failed\r\n");
forecast_client.stop();
return( retval );
}
char *ptr = json;
bool data_begin = false;
while( forecast_client.available() ) {
if ( data_begin ) {
ptr[ forecast_client.readBytes( ptr, WEATHER_FORECAST_BUFFER_SIZE - 1 ) ] = '\0';
}
else if ( forecast_client.read() == '{' ) {
data_begin = true;
*ptr = '{';
ptr++;
}
}
forecast_client.stop();
if ( data_begin == false ) {
free( json );
return( retval );
}
DynamicJsonDocument doc(20000);
DeserializationError error = deserializeJson( doc, json );
if (error) {
Serial.print(F( __FILE__ "weather forecast deserializeJson() failed: "));
Serial.println(error.c_str());
doc.clear();
free( json );
return( retval );
}
retval = doc["cod"].as<int>();
if ( retval != 200 ) {
Serial.printf( __FILE__ "get weather forecast failed, returncode: %d\r\n", retval );
doc.clear();
free( json );
return( retval );
}
weather_forecast[0].valide = true;
for ( int i = 0 ; i < WEATHER_MAX_FORECAST ; i++ ) {
weather_forecast[ i ].timestamp = doc["list"][i]["dt"].as<long>();
snprintf( weather_forecast[ i ].temp, sizeof( weather_forecast[ i ].temp ),"%0.1f°C", doc["list"][i]["main"]["temp"].as<float>() - 273.15 );
snprintf( weather_forecast[ i ].humidity, sizeof( weather_forecast[ i ].humidity ),"%f%%", doc["list"][i]["main"]["humidity"].as<float>() );
snprintf( weather_forecast[ i ].pressure, sizeof( weather_forecast[ i ].pressure ),"%fpha", doc["list"][i]["main"]["pressure"].as<float>() );
strcpy( weather_forecast[ i ].icon, doc["list"][i]["weather"][0]["icon"] );
strcpy( weather_forecast[ i ].name, doc["city"]["name"] );
}
doc.clear();
free( json );
return( 200 );
}