Connecting Python to a flight simulator isn't always seamless. Here are two common error messages and their solutions:
For a complete list of what data you can access, refer to the FSUIPC Offsets Documentation provided by Project Magenta. Project Magenta tjensen/fsuipc: Python client wrapper for FSUIPC - GitHub 10 Nov 2022 —
The most popular Python library for FSUIPC is (or fsuipc on PyPI). Install it via pip:
: In some implementations, generating high-frequency telemetry (e.g., 60 updates per second) through FSUIPC can cause significant dashboard lag . fsuipc python
fsuipc.write(0x0B4C, value_to_write.to_bytes(2, byteorder='little')) fsuipc.process() # Important: Commit the write to the simulator
No solution is without trade-offs. Python’s interpreted nature introduces higher latency than compiled C++—typically 10–20 milliseconds per read/write cycle. For most cockpit builders logging engine data or driving external instruments, this is imperceptible. However, for ultra-high-frequency applications like real-time control loading or force feedback at 1000 Hz, Python may fall short. Additionally, the user must have the registered (paid) version of FSUIPC to access many advanced offsets; the free version limits most write operations. Finally, as of Microsoft Flight Simulator 2020, FSUIPC7 uses a WASM module, requiring careful configuration of the pyFSUIPC connection parameters.
print("Pausing simulator...") client.write(0x0262, 1) Connecting Python to a flight simulator isn't always
time.sleep(3) # Wait 3 seconds
# Write a value to the aircraft's altitude ipc.write('Altitude', 10000, fsuipc.FLOAT)
: Requires 64-bit Python . 32-bit Simulators (FSX, FS2004) : Requires 32-bit Python . 💻 Step-by-Step Installation Guide Install it via pip: : In some implementations,
pip install pyuipc
: Launch your flight simulator (MSFS, P3D, or FSX). Ensure that FSUIPC is correctly installed and running. Your Python script will connect to the simulator through it.
is an interface created by Pete Dowson that acts as a bridge between the flight simulator's internal workings and external applications. It maps internal simulator data (altitude, speed, heading, switch states) to specific memory addresses known as Offsets .
While FSUIPC natively supports Lua scripting and provides a C/C++ SDK, Python has become the language of choice for modern flight simulation developers for several reasons:
— This error often indicates a word length mismatch between the client and server processes. If your flight simulator software is 32-bit, you need to be running a 32-bit version of Python. Similarly, if your flight simulator is 64-bit, you need to run a 64-bit version of Python.