Brand: Raspberry Pi Foundation

Functions: Astrophotography automation (Stellarmate using EKOS, KStars and Indi drivers)

Bus communication: USB, I²C

Comments: Very common hardware for astrophography setups using EKOS.

Brands: Original Arduino, Joy-IT

Functions: Roof controller, Dust cover & flat field

Bus communication: I²C

Comments: More robust than expected, even at subzero temperatures

Brand: CGE Electronics

Functions: First level observatory automation (Remote power switch, rain, temperature, humidity, redundant roof control)

Bus communication: Ethernet and EBX

Comments: Very reliable even at subzero temperatures, intuitive programming interface (maybe not made for complex codes)