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ESP8266 get weather from Weather Underground
/****************************
The MIT License (MIT)
Copyright (c) 2015 by bbx10node@gmail.com
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
******************************/
#include <ESP8266WiFi.h>
#ifndef min
#define min(x,y) (((x)<(y))?(x):(y))
#endif
#ifndef max
#define max(x,y) (((x)>(y))?(x):(y))
#endif
#include <ArduinoJson.h>
const char SSID[] = "********";
const char PASSWORD[] = "***************";
// Use your own API key by signing up for a free developer account.
// http://www.wunderground.com/weather/api/
#define WU_API_KEY "****************"
// Specify your favorite location one of these ways.
//#define WU_LOCATION "CA/HOLLYWOOD"
// US ZIP code
//#define WU_LOCATION ""
#define WU_LOCATION "90210"
// Country and city
//#define WU_LOCATION "Australia/Sydney"
// 5 minutes between update checks. The free developer account has a limit
// on the number of calls so don't go wild.
#define DELAY_NORMAL (5*60*1000)
// 20 minute delay between updates after an error
#define DELAY_ERROR (20*60*1000)
#define WUNDERGROUND "api.wunderground.com"
// HTTP request
const char WUNDERGROUND_REQ[] =
"GET /api/" WU_API_KEY "/conditions/q/" WU_LOCATION ".json HTTP/1.1\r\n"
"User-Agent: ESP8266/0.1\r\n"
"Accept: */*\r\n"
"Host: " WUNDERGROUND "\r\n"
"Connection: close\r\n"
"\r\n";
void setup()
{
Serial.begin(115200);
// We start by connecting to a WiFi network
Serial.println();
Serial.println();
Serial.print(F("Connecting to "));
Serial.println(SSID);
WiFi.begin(SSID, PASSWORD);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(F("."));
}
Serial.println();
Serial.println(F("WiFi connected"));
Serial.println(F("IP address: "));
Serial.println(WiFi.localIP());
}
static char respBuf[4096];
void loop()
{
// TODO check for disconnect from AP
// Open socket to WU server port 80
Serial.print(F("Connecting to "));
Serial.println(WUNDERGROUND);
// Use WiFiClient class to create TCP connections
WiFiClient httpclient;
const int httpPort = 80;
if (!httpclient.connect(WUNDERGROUND, httpPort)) {
Serial.println(F("connection failed"));
delay(DELAY_ERROR);
return;
}
// This will send the http request to the server
Serial.print(WUNDERGROUND_REQ);
httpclient.print(WUNDERGROUND_REQ);
httpclient.flush();
// Collect http response headers and content from Weather Underground
// HTTP headers are discarded.
// The content is formatted in JSON and is left in respBuf.
int respLen = 0;
bool skip_headers = true;
while (httpclient.connected() || httpclient.available()) {
if (skip_headers) {
String aLine = httpclient.readStringUntil('\n');
//Serial.println(aLine);
// Blank line denotes end of headers
if (aLine.length() <= 1) {
skip_headers = false;
}
}
else {
int bytesIn;
bytesIn = httpclient.read((uint8_t *)&respBuf[respLen], sizeof(respBuf) - respLen);
Serial.print(F("bytesIn ")); Serial.println(bytesIn);
if (bytesIn > 0) {
respLen += bytesIn;
if (respLen > sizeof(respBuf)) respLen = sizeof(respBuf);
}
else if (bytesIn < 0) {
Serial.print(F("read error "));
Serial.println(bytesIn);
}
}
delay(1);
}
httpclient.stop();
if (respLen >= sizeof(respBuf)) {
Serial.print(F("respBuf overflow "));
Serial.println(respLen);
delay(DELAY_ERROR);
return;
}
// Terminate the C string
respBuf[respLen++] = '\0';
Serial.print(F("respLen "));
Serial.println(respLen);
//Serial.println(respBuf);
if (showWeather(respBuf)) {
delay(DELAY_NORMAL);
}
else {
delay(DELAY_ERROR);
}
}
bool showWeather(char *json)
{
StaticJsonBuffer<3*1024> jsonBuffer;
// Skip characters until first '{' found
// Ignore chunked length, if present
char *jsonstart = strchr(json, '{');
//Serial.print(F("jsonstart ")); Serial.println(jsonstart);
if (jsonstart == NULL) {
Serial.println(F("JSON data missing"));
return false;
}
json = jsonstart;
// Parse JSON
JsonObject& root = jsonBuffer.parseObject(json);
if (!root.success()) {
Serial.println(F("jsonBuffer.parseObject() failed"));
return false;
}
// Extract weather info from parsed JSON
JsonObject& current = root["current_observation"];
const float temp_f = current["temp_f"];
Serial.print(temp_f, 1); Serial.print(F(" F, "));
const float temp_c = current["temp_c"];
Serial.print(temp_c, 1); Serial.print(F(" C, "));
const char *humi = current[F("relative_humidity")];
Serial.print(humi); Serial.println(F(" RH"));
const char *weather = current["weather"];
Serial.println(weather);
const char *pressure_mb = current["pressure_mb"];
Serial.println(pressure_mb);
const char *observation_time = current["observation_time_rfc822"];
Serial.println(observation_time);
// Extract local timezone fields
const char *local_tz_short = current["local_tz_short"];
Serial.println(local_tz_short);
const char *local_tz_long = current["local_tz_long"];
Serial.println(local_tz_long);
const char *local_tz_offset = current["local_tz_offset"];
Serial.println(local_tz_offset);
return true;
}
@consolacion

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consolacion Nov 28, 2016

interesting. Initially i did not get more output than :
bytesIn 225
respLen 226
0.0 F, 0.0 C, RH
which no doubt should show the temperature and relative humidity
But a regenerated API-key (mine was ancient already) solved it,

thanks for the sketch

consolacion commented Nov 28, 2016

interesting. Initially i did not get more output than :
bytesIn 225
respLen 226
0.0 F, 0.0 C, RH
which no doubt should show the temperature and relative humidity
But a regenerated API-key (mine was ancient already) solved it,

thanks for the sketch

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VojislavM Dec 6, 2016

Great sketch, it worked like a charm 👍

Great sketch, it worked like a charm 👍

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mpo881 Dec 21, 2016

Likewise, I got the results;
image
Regenerated new API key and same results. I searched on Weather Underground by my zip code and it returned the correct results for my location. Not sure why I cant get the code to work?
Thanks
Tried a 3rd API key and it is now working? Crazy.
Thanks

mpo881 commented Dec 21, 2016

Likewise, I got the results;
image
Regenerated new API key and same results. I searched on Weather Underground by my zip code and it returned the correct results for my location. Not sure why I cant get the code to work?
Thanks
Tried a 3rd API key and it is now working? Crazy.
Thanks

@newbie1994

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newbie1994 Feb 9, 2017

Hello,

I am thinking of doing a project with the Adafruit Feather HUZZAH with ESP8266.

Will this code work with this development board?

Thanks in advance!

Hello,

I am thinking of doing a project with the Adafruit Feather HUZZAH with ESP8266.

Will this code work with this development board?

Thanks in advance!

@LarryJing

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LarryJing Jul 19, 2017

instead of defining location, you can just put in autoip

instead of defining location, you can just put in autoip

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LarryJing Jul 19, 2017

where do you download the esp library?

where do you download the esp library?

@mechanic98

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mechanic98 Sep 30, 2017

Basic Infos

i am writing a code that give weather forecast from wunderground.com website with HTTP request, and i want send to me this forecast in telegram. i use UniversalTelegramBot library to send message in telegram. so this code have to part:
1- give weather forecast from wunderground.com
2- send this forecast in telegram Bot
Each part work as well , but when i merge two part i give Exception (29) error :(

Hardware

Hardware: NodeMcu Lua WIFI Board Based on ESP8266 CP2102 Module (ESP-12E)
Core Version: I do not know!!!
because i flash my esp with ESP8266Flasher.exe
my setings in ESP8266Flasher is in this picture:

Settings in IDE

Module: Adafruit HUZZAH esp8266
Flash Size: 4MB(3MB SPIFFS)
CPU Frequency: 80Mhz
Upload Using: SERIAL 115200

Sketch

https://pastebin.com/0z9YFd06

Debug Messages

https://pastebin.com/suesbtiv

Basic Infos

i am writing a code that give weather forecast from wunderground.com website with HTTP request, and i want send to me this forecast in telegram. i use UniversalTelegramBot library to send message in telegram. so this code have to part:
1- give weather forecast from wunderground.com
2- send this forecast in telegram Bot
Each part work as well , but when i merge two part i give Exception (29) error :(

Hardware

Hardware: NodeMcu Lua WIFI Board Based on ESP8266 CP2102 Module (ESP-12E)
Core Version: I do not know!!!
because i flash my esp with ESP8266Flasher.exe
my setings in ESP8266Flasher is in this picture:

Settings in IDE

Module: Adafruit HUZZAH esp8266
Flash Size: 4MB(3MB SPIFFS)
CPU Frequency: 80Mhz
Upload Using: SERIAL 115200

Sketch

https://pastebin.com/0z9YFd06

Debug Messages

https://pastebin.com/suesbtiv

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jma34 Mar 23, 2018

Thank you for the code! Everything work fine for me.
Maybe you can help with one question: "how can correct parse /forecast/ .json?"

jma34 commented Mar 23, 2018

Thank you for the code! Everything work fine for me.
Maybe you can help with one question: "how can correct parse /forecast/ .json?"

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