Via the URL https://gpsgadget.buienradar.nl/data/raintext/?lat=52.37&lon=4.89 I can get the expected rainfall for the next two hours for a GPS location. This is shown in two columns, the amount of precipitation on the left and the time per 5 minutes on the right.
Although I get a JSON Parse Error I can request the two columns in NR with a http request (see attachment).
I would like to calculate the rainfall for the next hour so I have to add the first twelve values from the left column. Can someone explain to me how I can properly request the data and then calculate the rainfall for the next hour?