AstroLink 4 Pi is the first device in the AstroLink family, that can operate in standalone mode. It is controlled by the internal Raspberry Pi* 4 module, which is responsible for running the astroimaging setup. Provided AstroLink 4 Pi INDI driver controls all the device components. Recommended operating system is astroberry (https://www.astroberry.io/) with KStars and Ekos software (see Ekos documentation here).

AstroLink 4 Pi is powered with 12V via a reliable XT60 socket. It can either connect to an existing WiFi network or create its own hotspot. Once connected, an imaging session can be planned via a remote desktop available in the regular browser. Any computer, laptop, or tablet can be used to plan and control the imaging session. See the astroberry system page and AstroLink 4 Pi manual for details.

Main features of the AstroLink 4 Pi device:

focuser motor control for Robofocus, Moonlite, or generic unipolar or bipolar stepper motor
up to 1/32 micro-stepping control with 2.0A maximum current and 1.4A maximum continuous hold current
temperature, humidity, and sky temperature/cloud coverage/sky brightness sensor support (version 3 only)
permanent focuser position – no need to park focuser after the session
2 adjustable PWM power outputs to control dew heaters, telescope fans, or custom Peltier coolers. The maximum load is 40W per output
2 switchable 12V DC outputs to power mount, cameras, or filter wheels. The maximum load is 5A per output
1 additional 12V DC output
1 additional adjustable 3-10V output
integrated real-time clock (version 2 and later)
XT60 high current input voltage socket
integrated cooling fan enabled automatically when CPU temperature rises
connectivity: LAN and WiFi
USB ports: 2xUSB3.0, 2xUSB2.0
dimensions 137 x 85 x 32 mm
weight 235g (with Raspberry Pi* module installed)