Nope it seems to be a USB hickup with the Linux core. So no, its maybe a collection of stuff and its frustrating. The other stuff is when the baud rate (not in your case) is fine for an instant but for continued use maybe a problem. When I program an ESP32 on 115k its fine, but if I want the continuous serial monitoring it drops the connection so slower is maybe better. I do not know anymore if USB and The RasPi is a good idea. Maybe using plain UART comms would be better but you have just so much UART TTL ports. I am now talking BS like my bosses in circles and confusing everyone. Its seems there is no short resolution for the problem that updating the core and firmware. And by that time we have a raspberry pi 10
--
73 de Eugene / ZR4EM
ZR4EM / Eugene