ASCOM Master Interfaces (Alpaca and COM)

Authors: Robert B. Denny, Peter W. G. Simpson - ASCOM Initiative

This document contains the official ASCOM Alpaca and COM application programming interface (API) specifications for Camera, CoverCalibrator, Dome, FilterWheel, Focuser. ObservingConditions, Rotator, SafetyMonitor, Switch, and Telescope astronomy devices. By design, these interfaces are functionally identical on classic COM ASCOM and Alpaca. This permits interoperation between apps and devices whether they use COM or Alpaca.

Important

The specifications here are written in a generic form, without dependence on any specific language or operation system. Thus datatypes here are generic in nature. For specifics, see the ASCOM documentation for COM or Alpaca, and for your language and operating system.

Start Here

• Introduction to Master Interfaces

• Release Notes for Interfaces as of ASCOM Platform 7

• ASCOM Master Interface Definitions

• Frequently Asked Questions

For More Information

• ASCOM Initiative web site (external)

• About Alpaca and ASCOM (external)

• ASCOM Alpaca Developers Information (external)

• ASCOM COM Developers Information (external)

• ASCOM Driver and Application Development Support Forum (external)