Weather Library for Spark-Core

This is a simple library to load weather information from openweathermap.com, made for spark core (http://spark.io) (Arduino compatible).

It's free, you just have to sign up for an api-key at: http://openweathermap.org/appid

This library should be considered alpha tested software. Please report any problems, I am happy to help.

Installation

• You have to download the HttpClient.cpp/HttpClient.h files from HttpClient library to your project.
• As well download the library https://github.com/bblanchon/ArduinoJsonParser with the .cpp and .h files. Put the files in the utility directory also in a the utility directory in your project.
• Download the files .cpp/.h files from this project page.

If you are building locally, change the file build.mk and add the .cpp files.

Usage

See the following code, replace the location and the api key.

#include "openweathermap.h"
#include "HttpClient.h"


Weather* weather;
HttpClient* httpClient;

void setup() {		
	httpClient = new HttpClient();
	weather = new Weather("London,UK", httpClient,
			"INSERT your api key here!");
	weather->setCelsius();
	// or weather->setFahrenheit();
}

void loop() {
	weather_response_t resp = weather->cachedUpdate();
	if (resp.isSuccess) {
		Serial.print(resp.temp_low);
		Serial.print("-");
		Serial.print(resp.temp_high);
		Serial.println(resp.descr);
	}
}

There is also a non-cached method, if you want to handle caching yourself:

		weather_response_t resp = weather->update();

Also see the example in the project directory.

Weather data

Currently the library loads the high and low temperature for today, including a short description. You can see the list of Condition-Codes at: http://openweathermap.org/wiki/API/Weather_Condition_Codes

Can I extend it to include other data?

Sure! Look at the data: http://api.openweathermap.org/data/2.5/forecast/daily?q=London&mode=xml&units=metric&cnt=2

then change the method Weather::parse and extend the weather_response_t.

How could I help? (TODO)

• test in Spark web ide
• make two distribution files (cpp and h) including everything, to make it easier to include in a project

Have fun! Share!