Hey @jpmeijers, thanks for your answer. I have two problems.
1: I can’t see any Data from my T-Beam at TTNMapper.
At the V3 console there are the Datapoints (see my first post). I have also integrated the Webhook (see also my first Post).
When i now under Advanced Maps my ID “trackerjulian”, no data is displayed. I am now assuming that something is wrong with the translation of the payload. Could you check whether the data as described above is correct? Or do I have to do something differently?
2: When I run my gateway under V2, it is shown on the map. As soon as I run it on V3, it is no longer displayed on the map. Under Loaction I set the gateway to Publish. I also entered coordinates (once exactly the same as under V2, once at least 150m further away). Does anything else have to be done here?
best regards
Julian