HI there I found only one thread about this issue, so I open a new one to report my werdict.
I had no problem for a while, but there was some update and its started.
I tried 3 different moduels, two different DC adapters, I got the same warning messages: dispatch_command() : serial port read failed for 200ms (1 retries), verify mount link.
I made some test, I took out the mount electronis and its near to the raspberry about 5cm. I got the same error message: dispatch_command() : serial port read failed for 200ms (1 retries), verify mount link.
But When I connecting with laptop about 2m there is on connection issues here is the log from EQMOD log file belove.
As can be seen there is no communication issues the delay is does not exceed 300ms and sometimes approaches to 100ms.
So my final werdict its looks like indi or raspberry problem, but about 5cm should be over 200ms readouts.