@Stefan-de-Lange Allright, but isn’t LWM2M built on top of CoAP, which I can’t get to work in the first place? I also only need message confirmation (and QoS would be nice too) for now. There’s indeed a ton of material to be found on LWM2M (and CoAP), but that’s all high-level stuff that doesn’t seem to (directly) apply to the problem I’m having (my CoAP packets not arriving at T-Mobile or my endpoint).
Do you maybe know when I can expect more detailed documentation/tutorials/examples on how CoAP works with your network?
Also, the sign up form at https://iotcreators.com/en/installfest/ doesn’t seem to be working. I’d like to attend, is it already fully booked or can I still join?