Hi,
I run Astroberry on a RPi4 with AZ-GTi, ASI294mc for imaging, and asi120mm mini for guiding. I leave everything outside and connect to the RPI4 from Kstars on Windows indoors. Works very well!
The RPI4 wifi doesn't have the longest reach (as the AZ-GTi). Also, I have issues with the AZ-GTi outside due to the massive amount of wifi routers nearby.
So I ended up using a EQDIR cable (made one from a FTDI 3.3V uart cable) from the RPi to the AZ-GTi. Rosck solid. I also run Ethernet cable from the RPi to the windows computer or the house Wifi accesspoint.

I'm not using the synscan app anymore, except for configuring the Wifi.
I polar align with the ekos polar alignment tool, and then pick about 3 points around in the sky, that ekos plate solves and syncs. To gotos get pretty good from that.

If you connect by wifi, you can do this a number of ways:
1) Connect the RPi, AZ-GTi, and synscan app device/computer to your house access point.
2) Connect the AZ-GTi and synscan app device/computer to your RPi
3) Connect the synscan app device/computer and RPi to the AZ-GTi accespoint.

You can create a prioritized list of wifi configurations in the astroberry so it will connect to the house wifi first, connect to the AZ-GTi second, or create an accespoint third, if the two other fails.

I love this rig! I'm up and imaging in 25 minutes including polar alignment. I guess part of the success is that I'm using a 250 mm f4 spacecat for imaging, thus it's fairly forgiving about accuracy :-)

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