By using Python to read and write to these FSUIPC offsets, you can: Create external custom autopilots.
# Altitude from 0x0570 is in meters. Convert to feet. altitude_ft = altitude * 3.28084
(MSFS 2020, FSX, Prepar3D, etc.) and ensure FSUIPC is loaded.
fs.write_int(0x07CC, 90) # Heading bug offset
: Because Python excels at data science, it is frequently used to export flight data to CSV or databases for post-flight analysis, helping virtual pilots refine their landing rates or fuel efficiency. fsuipc python
The following example demonstrates how to establish a connection to FSUIPC, read the aircraft's indicated airspeed and altitude, and print the values to the console in real-time.
: A simple Python client wrapper built on top of pyuipc . It provides a clean class-based interface for reading and writing data.
A complete offset list is available in the FSUIPC for Programmers.pdf provided with FSUIPC.
"FSUIPC Python" usually refers to a Python library (most commonly fsuipc or pyuipc ) that allows Python scripts to talk to this interface. This effectively turns Python into a tool that can control every aspect of the simulator. By using Python to read and write to
Control cockpit hardware (knobs, switches, displays) via Arduino/Raspberry Pi.
Easily connect Arduinos or USB panels to the sim using Python libraries.
| Offset | Size | Description | Example | |--------|------|-------------|---------| | 0x0B70 | 2 | Indicated airspeed (knots) * 128 | 250 knots → 32000 | | 0x0574 | 4 | Latitude (degrees * 1e7) | 40.7128° → 407128000 | | 0x0578 | 4 | Longitude (degrees * 1e7) | -74.0060° → -740060000 | | 0x07D0 | 4 | Autopilot altitude target (meters) | 3000 m | | 0x07DC | 2 | Autopilot master (0=off, 1=on) | 1 | | 0x0CD8 | 4 | Engine fuel flow (pounds/hour) | 2500 |
Note: The free/unregistered version of FSUIPC is usually sufficient for basic Python reading and writing capabilities. 2. Install the Python Library altitude_ft = altitude * 3
unlocks the full potential of flight simulator automation. Whether you’re building a home cockpit, analyzing flight data, or prototyping AI pilots, this combination is flexible, powerful, and surprisingly easy to learn.
This guide explores how to connect Python to your flight simulator using FSUIPC, covering everything from environment setup to advanced data logging. What is FSUIPC?
FSUIPC is a set of interfaces, functions, and data structures that allow developers to access and manipulate the internal state of Flight Simulator X and Prepar3D. This interface provides a way to read and write data to the simulator, enabling developers to create custom applications, such as:
ias_raw = fsuipc.read(0x0B70, 2) ias_knots = ias_raw[0] / 128.0 print(f"Indicated Airspeed: ias_knots:.1f knots")
Here are common offsets to get you started:
import fsuipc