Not being the kind of guy that buy an off the shelf solution for something for $200 when I could spend $500 to make it myself, I put together the software suite I wanted for the Raspberry Pi v5 to run my scope/mount/camera remotely (from inside the car or cabin 20ft away). Tested at home everything worked fine. Polar alignment via Polemaster worked nicely, and a two star alignment set the model well enough to find what I wanted.
decamp to a park 5 miles away that has a larger sky and less light pollution than my yard. Polar align and start model alignment and the mount poiints seemngly random directions, anywhere but where the thing is.
I'm sure many reading this will start to laugh at this point (well deserved), but it took me 4 months to realize the Raspberry Pi has NO REAL TIME CLOCK! I was getting out to where there is no wireless signal, and the pi was starting with the last time and date it was run. I was not resetting the date and time when I booted it. Dope Slap! everything works well if I remember to do that.
There are small modules you can install in the Pi that provides an RTC - DS3231 is just one of the chipsets used. Works well if it will fit in the case. If you get one, be sure to check if it will fit over the cooling fan and heat sink for the Pi 5. the one I got won't, so required modification to mount it elsewhere. these things are cheap.
I have found the Pi 5 to be quite capable as on telescope control computer. I use both the internal WiFi and a WiFi dongle. the internal sets up a hotspot to remote into, and the dongle connects to the WiFi dongle on the mount. The fewer wires the better. For the EQ6-r, the WiFi dongle can also be used to remote into the pi, but for the AVX the celestron mounts wifi won't. Probably a way to fix this, but haven't tried.
I put together a power supply distribution box that takes a single 12v input and splits it to everything that needs it, and supplies a USB-c with 5v for an iPad.
There is also a 6v to 24v input power supply for the Pi (5v), so it all works well with only a single 12v wire from the mount to the battery.
The Pi 5 also has a PCie bus so you can install an SSD drive. I installed 512 GB SSD. Lots of room for pics before I have to download everything.
I use primarily Siril, Kstars, PHD2, and Polemaster. l did have to install most of this from source, but the details are out there.
