OpenWeatherMap

This sample illustrates the communication with an HTTPS/REST API. HTTPS GET requests are sent to obtain weather data from the OpenWeatherMap REST API. The response of the web service containing the data is in a JSON format.

To send requests to the OpenWeatherMap REST API, the user must create an account for OpenWeatherMap to receive an application ID. In combination with a location identifier (e.g. latitude/longitude, city ID, city name), the application ID can be used to query weather data.

API documentation for various use cases (16-day forecast, current data etc.) can be found here: https://openweathermap.org/api.

PROGRAM MAIN
VAR
    // trigger command execution for OpenWeatherMap samples
    bGetOpenWeatherMap             : BOOL;

    fbHttpClientOpenWeatherMap     : FB_IotHttpClient :=(sHostName:='api.openweathermap.org',
                                     bKeepAlive:=TRUE, tConnectionTimeout:=T#10S);

    fbHttpGetOpenWeatherMap        : FB_TestHTTP_Get_openWeatherMap;
END_VAR

//init client parameters at startup
IF NOT fbHttpClientOpenWeatherMap.bConfigured THEN
    fbHttpClientOpenWeatherMap.nHostPort:= 443;
    fbHttpClientOpenWeatherMap.stTLS.bNoServerCertCheck:= TRUE;
END_IF

IF fbHttpClientOpenWeatherMap.bConfigured THEN
    fbHttpGetOpenWeatherMap(bSend:=bGetOpenWeatherMap, fbClient:=fbHttpClientOpenWeatherMap);
END_IF

fbHttpClientOpenWeatherMap.Execute();