Hi @oval -
Welcome to the forums!
Sorry for the issue. I can’t say I recall how, or if we solved Clark’s issue!
Can you share what version of BlueOS, and the ZeroTier extension version you’re using?
When you load the mavlink endpoint page, and create a new endpoint, did you select UDP Client, and was the IP address field autopopulated with your ZeroTier IP?
Is your BlueBoat reaching the internet only via the cellular modem when you access it via ZeroTier IP? How are you reaching the internet when testing on your computer?
No communication link needs to be created, you can delete that. Are you using QGC version 4.2.8?