I have been playing around with a Raspberry Pi 3 I recently bought with the intention of setting up my imaging setup and controlling it remotely from the warmth of the house
I realise that others have posted threads on what they are doing and it's not really new as such but I thought I'd post on my intial feelings.
Bear in mind that my experiments so far have been house-bound (due to cloud cover and lack of time so far).
Previously I have used a laptop next to the scope with my EOS 40D running through Backyard EOS, my guide cam running through PHD2 and using Cartes Du Ciel to navigate and control through the standard windows ASCOM drivers using an EQDIR lead to connect laptop to mount.
For this new setup I am using a Raspberry Pi 3 model B (the latest) running Ubuntu Mate which is a good way to get full INDI control (ASCOM driver equivalent). Just after installing kstars (open source all-in-one workbench/planetarium s/w) and tightvnc remote control s/w (using Gnome to get a good remote desktop GUI view) I straight-away got my EOS 40D connected and imaging through kstars and also got my QHY5LII guide cam working (have not tried out alignment in anger yet). Last night I set up my NEQ6Pro mount in the lounge room and connected to that and also set up my hand controller (an Xbox 360 wired controller in a rather fetching shade of pink) - the last bit was the only hiccup I found - you need to carefully order the startup of the mount and joystick instances otherwise even though the s/w can see them both the joystick inputs do not register through to the mount.
I have used the planetarium s/w to go from unparked to slew to some random objects to verify comms but next step is to see how it all works together with me sat in a different room.
I do not have a focusser for my reflector and that is the one thing that will see me having to run outside to do from time to time, as well as setups and alignment duties (I have no fixed pier but have a casual setup).
Really surprised how easy it all was (mind you, I do work in IT so am happy to roll my sleeves up if needed).
Next steps:
Obviously do a full outside setup and hopefully image remotely (well - backyard at least
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Think about an option for focusing - maybe a stepper motor controller either with the Raspberry or with the Raspberry Pi Zero W I have not used yet.
Happy to answer any questions and would be keen to hear what other people are doing in this area.