It looks like if there was a regex solution to the first forecast changing the group number you're starting at, then the HTTP retriever data source would be an option.

Could always publish this to it from the updated Mango. The Persistent TCP publisher or HTTP publisher would probably work.

MangoES's do have 2-->3 upgrade pricing available but not through the store.

The TCP/IP data point solution may not be so bad.

As always thank you!

If you know the headers you need in that GET (no dynamic request construction), you could put the whole GET HTTP request into the Query command of an alphanumeric TCP/IP point (don't forget the trailing \n\n in HTTP, and a \n between header rows)

So probably a query command like (you may need to experiment with removing the Host header, adding Content-Type, whatever. The easiest would be making the request in the browser with the developer tools open, then you can see a working request's [probably excessive] headers),

GET /forecast/token/45.321488,%20-75.671071?units=si&exclude=minutely,hourly HTTP/1.1\nHost: api.darksky.net\n\n

Then from your script you can do

RuntimeManager.refreshDataPoint("DP_TCPIP_HTTP_Magic");
var response = tcpIpHttpMagicContextPoint.value;

var headers = {}
var parameters = {}
var regex = '{\"time\":(\\d*),.*?\"temperature\":(-?\\d*\\.?\\d*).*?\"daily\".*?{.*?\\[.*?\"time\":(\\d*),.*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?\"temperatureHigh\":(-?\\d*\\.?\\d*).*?]';
var match;

// This is the function which parses the returned data from DarkSky
// The passed variable "data" is the actual JSON contents returned
function handleTemperatureData(data) {

   // The var match is an array which results from parsing the data through the regex
   // Each element of the array is an individual value where
   // match[1] returns current time
   // match[2] returns the current temperature
   // match[3] is a time value for the first forecast value
   // match[4-11] are the daily forecast high temperatures
   match = RegExp(regex).exec(data);

    var k;
    
    // This is required because the way that DarkSky returns data sometimes 
    // the first "forecast" data point is actually still a forecast temperature
    // for today. If this is the case then we have to skip this value otherwise
    // the forecast for tomorrow will actually be the forecast for today etc
    if(match[3] < match[1]) { 
        // This means that the first reading is for today, skip it and use the 
        // next value as a starting point
        k = 5;
    } else {
        k = 4;
    }

    if(match.length >= 11) {
        CurrentTemp.set(match[2]);
        OneDayForecastTemp.set(match[k]);
        TwoDayForecastTemp.set(match[k+1]);
        ThreeDayForecastTemp.set(match[k+2]);
        FourDayForecastTemp.set(match[k+3]);
        FiveDayForecastTemp.set(match[k+4]);
        SixDayForecastTemp.set(match[k+5]);
        SevenDayForecastTemp.set(match[k+6]);
        
    }
} // End of function
 
// This portion is the part which actually retreives the data from DarkSky
HttpBuilder.get("https://api.darksky.net/forecast/token/45.321488,%20-75.671071?units=si&exclude=minutely,hourly", headers, parameters).err(function(status, headers, content) {
  throw "Script failed with HTTP status: " + status;
}).resp(function(status, headers, content) { 
   // Needs to be 200 status or you can set the accepted statuses
   // If all is well then call the parsing function and pass the JSON to it
   handleTemperatureData(content);
}).execute();

Is there any way to duplicate this functionality on a V2 Mango ES?

@phildunlap hmmm... what version did that functionality appear in? The Mango in question that I will be loading it into is still a v2.8.