1 Introduction
The state-of-the-art OnStep GoTo controller, designed by Howard Dutton, is
extremely powerful and feature-rich. However, this document will only explain the
basic configuration and operation applicable to Hubble ULXXG scopes. For advanced
users who want to explore the full potential of the OnStep controller, please refer to
the OnStep Instruction Wiki.OnStep instruction WiKi
The Hubble OnStep controller supports:
INDI (WiFi) and ASCOM (WiFi, Bluetooth, and USB) under the LX200
protocol.
WiFi 802.11n/g/n connection with a built-in website accessible from any
browser on any platform, and direct WiFi support for Sky Safari and
Stellarium.
Bluetooth classic 4.2 support for host computer ASCOM connection and
direct wireless support to Sky Safari & Stellarium.
iOS App and Android Virtual Handpad Apps for controlling the scope,
including initialization, configuration, alignment, and movement (slewing and
GoTo). You are strongly recommended to use the Android-based OnStep
Controller2 for the initial setup!
Smart Hand Controller with approximately 30,000 objects. Although the scope
can be fully controlled — including initialization, configuration, alignment,
and movement (slewing and GoTo) — without any other device needed, the
use of the Android-based OnStep Controller2 is strongly recommended for the
initial setup!
Telescope Encoders for extra accuracy in pointing and tracking.
Real-Time Clock (RTC): The RTC module maintains seconds, minutes, hours,
day, date, month, and year information.
Please refrain from flashing the OnStep firmware on the controller and handpad
independently without prior consultation with Hubble Optics. Failing to adhere
to this directive may result in damage to the controller and/or handpad and will
consequently void the warranty.
MPORTANT: Safety Warning Regarding Stepper Motors and Electrical
Equipment
Stepper motors are powerful and, if misused, can cause extreme damage to equipment
and pose significant risks to human life. Exercise utmost caution to ensure that your
telescope does not move to a mechanical limit, such as the ground, to prevent damage
to motors or gears and avoid injury to yourself and others. This product is NOT a toy
and should not be operated by children.
Adhere to the following safety precautions rigorously:
Avoid utilizing the equipment in adverse conditions.
Be mindful of electrical safety: shocks and bodily injuries can occur if devices
using electricity are mishandled, particularly outdoors. Proper setup and
2
