smartmeter | Smart electricity meter data parser , written in Go | Parser library

The body is Base64 encoded, you can decode it with https://docs.microsoft.com/en-us/dotnet/api/system.convert.frombase64string?view=netframework-4.8

This is the readable body of your message: {"DateTime":"2019-10-05T10:09:29","ActualTarrif":1,"ActualPowerDelivered":271.0,"TotalElectricityDeliveredTarrif1":6015577.0,"TotalElectricityDeliveredTarrif2":6027952.0}

Your most inner for loop is looping over all the Value elements in the tree, not just the children of the S04 that you are currently looping through. Try this instead:

You can add extra fields (price_1, price_2,...) to existing measurement. Insert them with exactly same timestamp and tag values to get existing data records extended with these new price columns ready to be used in grafana:

You have most of your code right but the ngFor is not used in that way. The html tag with the ngFor is what will be repeated and you that's why you should use it in the li instead of the list tag ul. It would be like this for you:

You will need to specify the argument type in the text file otherwise it is impossible for Java to solve the ambiguity of some of the arguments in the runtime.

For example if you have class Book: