OrbitXP 5.5.0
OrbitXP is Sismo's native connector for X-Plane 12. It links Sismo Ethernet flight simulator modules with the Zibo 737-800X, providing automatic synchronization between the physical cockpit hardware and the aircraft.
OrbitXP communicates directly with X-Plane 12 through its native UDP interface. No third-party interface such as FSUIPC is required. The included Sismo OrbitXP plugin is required for startup, connection management and supported Zibo command handling.
Main Features
Direct UDP communication with X-Plane 12 and Zibo 737-800X.
Detects and manages Sismo Ethernet SimCards and connected cockpit modules.
Synchronizes switches, annunciators, displays, gauges, servos and other supported hardware.
Built-in diagnostic service for checking SimCard inputs, outputs, displays and servos.
Automatic Windows Firewall configuration for SimCard UDP communication.
OrbitXP is distributed by Sismo as freeware.
System Requirements
- Windows 11 64-bit
- X-Plane 12
- Zibo 737-800X Release V4.0 or later
- Sismo Ethernet SimCards and supported Sismo cockpit modules
- Sismo OrbitXP X-Plane plugin
Supported Sismo Modules
- MCP and Captain / First Officer EFIS
- Pedestal
- MIP
- FWD Overhead
- AFT Overhead
Availability of individual functions may depend on the Sismo hardware revision and on the functions/datarefs implemented by the installed Zibo release.
Latest Downloads
| Download | File | Release | Description | Date |
|---|---|---|---|---|
 |
OrbitXP | V5.5.0 | Latest release.
Note: Release pending full validation/testing.
|
August 13th, 2026 |
 |
OrbitXP User Manual | Ed. 5 | Current OrbitXP user manual for X-Plane 12 and OrbitXP V5.5.0. | August 13th, 2026 |
Installation Notes
1. Install OrbitXP
Run the OrbitXP installer. The installer configures the Windows Firewall rule required for Sismo SimCard Ethernet communication on UDP ports 1151-1155.
2. Install the X-Plane plugin
Copy the complete OrbitXP_Plugin folder into:
X-Plane 12\Resources\plugins\
The final Windows x64 plugin path must be:
X-Plane 12\Resources\plugins\OrbitXP_Plugin\64\win.xpl
Do not rename win.xpl.
3. OrbitXP configuration
OrbitXP V5.5.0 stores its writable configuration in:
C:\ProgramData\Sismo\OrbitXP\config.ini
This allows module options, display brightness and gauge calibration to be saved without running OrbitXP as Administrator.
| Release | Download | Main Changes | Date |
|---|---|---|---|
| V5.4.3 | |
FWD Overhead V1 Free Wiring compatibility. | September 4th, 2025 |
| V5.4.2 | |
Module enable/disable selection in the Options dialog. | August 26th, 2025 |
| V5.4.1 | |
Landing Gear lever position bug fix. | June 29th, 2024 |
| V5.4 | |
SismoFMC Service beta release. | May 7th, 2024 |
| V5.3.1 | |
OrbitXP Plugin V5.2 plus AFT Overhead and Pedestal improvements. | March 2nd, 2024 |
| V5.3 | |
VHF3 frequencies, VHF2/VHF3 LED indication and IRS display brightness control. | February 26th, 2024 |
| V5.2.1 | |
Pedestal and AFT Overhead updates for X-Plane 12. | February 24th, 2024 |
| V5.1 | |
FWD Overhead update for X-Plane 12. | February 19th, 2024 |
| V5.0 | |
First beta release for X-Plane 12. | February 5th, 2024 |
| V4.0 |  |
Auto-run plugin and FWD/AFT Overhead backlight support. | August 5th, 2021 |
| V3.6 | |
New Rudder Trim configuration. | April 23rd, 2021 |
| V3.5 | |
Performance improvements with multiple Sismo modules connected. | March 5th, 2021 |
| V3.4 | |
Engine starter solenoid fix, Bleed Duct Pressure gauges and improved error management. | January 13th, 2021 |
| V3.3 | |
ATC squawk, engine starter solenoid, retractable lights switches and error management. | January 7th, 2021 |
| V3.2 | |
MCP bug fixes. | November 16th, 2020 |
| V3.1 | |
First AFT Overhead release and Plugin V3. | November 9th, 2020 |
| V2.1 | |
First FWD Overhead release and new configuration file. | October 19th, 2020 |
| V1.6 | |
AFDS update, Flaps Gauge and AlbatrossService. | August 6th, 2020 |
| V1.4 | |
MCP/EFIS, Pedestal and MIP module support. | July 27th, 2020 |