Thank you for your information. I think I have the similar setup with you.
May I ask for your suggestion to solve my problem?

I configured my devices as below.
- Controller: StellarMate OS on RPi4B
- Device: SA 2i mount + SV305 guide CCD
- Connection: 
(1) SA 2i - StellarMate: USB-to-RJ12 cable
(2) SV305 - StellarMate: USB cable (SV305 doesn't have ST-4 interface)

At the point, I tried to start tracking on my SA 2i (STAR sign mode), but it didn't move.
INDI drivers for SA 2i and SV305 seems fine and there's no error message on connections.
What should I need to check?

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