AstroLink 4 mini II

🔭 AstroLink 4 mini II

A compact and multifunctional astrophotography controller designed for advanced setup automation and precision hardware control.


🌌 Key Features:

  • 🧠 Multifunctional controller designed for astrophotography setups
  • 💻 Requires external computer (laptop, mini PC, or Raspberry Pi)
  • ⚙️ Controls two focusing stepper motors simultaneously — perfect for dual-scope rigs
  • ⚡ 12V DC power switches for mounts, cameras, filter wheels, and more
  • 🔥 Regulated PWM outputs for dew heater control
  • 🔋 Adjustable 3–10V DC regulated output for auxiliary equipment
  • ⚡ (NEW in 2025) USB Quick Charge output (up to 18W) for powering mobile devices or accessories
  • 🎨 Available in three colors: black, graphite and cherry red

🌡️ Sensor Support & Monitoring:

📊 Supports sensors for:

  • Temperature
  • Humidity
  • Sky temperature / cloud coverage
  • Sky brightness

🔁 Automated workflow and dew heater control based on environmental conditions
📈 Live monitoring of:

  • Input voltage
  • Current draw
  • Energy consumption

🚨 Alert system for low voltage, overcurrent, and battery drain scenarios
🛡️ Overvoltage and overcurrent protection to safeguard sensitive equipment


🎯 Advanced Functions:

  • 📐 Focuser temperature compensation with built-in calculator
  • 📊 Focus and environment charts with export options
  • 💾 Permanent memory for focuser position — no parking required after each session

🧩 Software Compatibility:

✅ INDI Driver (Linux-based setups)
✅ ASCOM Drivers (Windows-based setups):

  • ASCOM Focuser
  • ASCOM Focuser 2 (for dual motor setups)
  • ASCOM Observing Conditions
  • ASCOM Switch

If you are looking for a simple focusing solution, please check the FocuserOne device.

If you are looking for an astrophotography controller integrated with a computer, please check the AstroLink 4 Bee or AstroLink 4 Pi.


📥 Latest software and downloads (ASCOM 7 platform only)

DevicePanel applicationASCOM driverFirmwareDocs / other
ASCOM 7 and new software stack is recommended
New software requires ASCOM 7 platform installed.
Additionally, AstroLink ASCOM driver, panel and firmware in version 5.x.x are required.
AstroLink 4 Bee5.0.14


Unified control panel manual [PDF]
YT presentation
5.0.81.0.4 (5.0.1)PDF / YT
AstroLink 4 MAX1.0.4 (5.0.1)PDF
AstroLink 4 micro1.0.4 (5.0.1)PDF
AstroLink 4 mini II1.0.4 (5.0.3)PDF
Software/firmware changelog

📥 Latest software and downloads (ASCOM 6 or 7)

DevicePanel applicationASCOM driverINDI driverFirmwareDocs / other
Previous software stack work with ASCOM 6 and 7 platform.
However, no new features will be implemented in this stack.
AstroLink 4 Bee4.6.133.2.10N/A1.0.4 (4.8.5)PDF / YT
AstroLink 4 micro4.6.13INDI1.0.4 (4.8.5)PDF
AstroLink 4 mini II4.9.2INDI1.0.4 (4.5.8)PDF
AstroLink 4 PiN/AN/AINDIN/APDF / YT
Software/firmware changelog
Other software
FTDI driversFTDI Virtual COM Port Drivers
CP210x driversSilicon Labs Virtual COM Port drivers
USBTreeView toolhttps://www.uwe-sieber.de/usbtreeview_e.html

🏞️ AstroLink gallery