OnStepX SWS Control

OnStepX SWS Control is an independent Android client for OnStep mounts running OnStepX firmware, over WiFi (TCP) or Bluetooth Classic (SPP). It works in the field with no Internet.

NOT OFFICIAL
An independent app, not affiliated with the OnStep project or its authors. It requires a mount with OnStepX: the app does not install or update firmware.

CONNECTION
• WiFi TCP and Bluetooth Classic SPP profiles
• Local network search and auto reconnection

POINTING
• Directional pad with immediate safety stop
• GoTo on RA/Dec or Alt/Az, sync on RA/Dec
• Multi-star alignment with suggested stars

LOCAL HORIZON
• Site obstacles by direction and altitude
• Obstacle warnings in GoTo, map and alignment

LIGHT POLLUTION
• Site sky brightness from David Lorenz's atlas
• Alignment stars and faint galaxies flagged

CATALOGS AND MAP
• Messier, NGC/IC and other catalogs
• Stars, computed Sun, Moon and planets
• Interactive sky map with FOV and GoTo

MOUNT
• Tracking, limits, home, park and backlash
• Configuration of axes, motors and drivers

PEC
• Recording, playback and curve chart
• Curve loaded from file compared with mount

FOCUSER, ROTATOR, AUXILIARY
• Named focuser positions, exportable and importable
• Focuser movement and temperature compensation
• Rotator, derotation, auxiliary outputs, dew heater, intervalometer

WEATHER
• Mount sensors and history with charts

DATE, TIME AND SITE
• Send date, time and GPS location

SAFETY AND COMFORT
• Settings protected by PIN or unlock
• Light, Dark, Night themes and demo mode

PRO FEATURES
All features for operating the mount stay free. From 1 March 2027, some advanced features (sky map, guided alignment, PEC, weather history, advanced axis settings, mount backlash, rotator, focuser temperature compensation, saved focuser positions) will require a one-time Pro in-app purchase with no subscription.

PRIVACY
No account, advertising, analytics or data collection: nothing is sent to any server. Profiles, settings and history stay on the phone; location is used only for the site and goes only to the mount.