OK that's embarrassing. It seems I connected interrupt / DIO0 to gnd. But i've reconnected the entire thing several times, including swapping... Anyway thanks for pointing it out. I still get some NACKs and the mqqt is not working anymore for some reason, but I'll figure that out, and do another post if necessary. Thanks for pointing it out!

Sometimes though, you may experience problems if your monitor or TV screen is set to disable USB power during standby. Monitors and TVs can often switch to standby very quickly if they don’t find an active source of content, and devices can often not turn on without power, causing a bit of a chicken and egg scenario. Add to this the fact that your device may be at the back of your monitor or TV in a spot that is hard to reach and you may find yourself in quite a frustrating scenario quite quickly.