BF SITL - FPV Laboratory

Adds a 1000Hz software-in-the-loop bridge to Betaflight firmware. Replaces the built-in flight controller with the real firmware running on your PC, turning the simulator into a controlled environment for iterating on PID gains, filters, and rates without risking real hardware.

This DLC adds a software-in-the-loop bridge between SITL Forge - FPV Laboratory and Betaflight firmware running on your PC. The built-in PID controller is replaced with the real firmware, so you fly and tune against the same code that runs on real hardware — driven by the simulator's 1000Hz physics model, calibrated against real bench measurements.<br><br>Requires the base app: SITL Forge - FPV Laboratory.<br><br>---<h2 class="bb_tag" >What This DLC Adds</h2><br><ul class="bb_ul"><li> 1000Hz PWM/FDM bridge — motor outputs and full physics state exchanged every millisecond<br></li><li> 50Hz RC channel link — joystick or RC transmitter feeds the firmware's stick inputs<br></li><li> MSP protocol over TCP — telemetry, blackbox, and configuration access<br></li><li> MSP WebSocket bridge — connect a Configurator session straight to the firmware<br></li><li> One-click mode switch — flip between built-in SIM and external firmware in-app</li></ul><br>---<h2 class="bb_tag" >A Controlled Environment for Real Tuning</h2><br>Iterate on PID gains, rates, filters, and rate profiles in a simulator that aims to approximate real airframe behavior as closely as possible — without risking hardware on every change. The behavior you see is driven by the same firmware code you'll flash to your drone, running against a physics model fitted to real bench data.<br><br><ul class="bb_ul"><li> Validate filter setups against simulated motor vibration<br></li><li> Iterate on PID gains and feedforward without crashing real hardware<br></li><li> Test rate profiles and stick feel before flashing<br></li><li> Reproduce tricky tuning issues in a controlled environment</li></ul><br>---<h2 class="bb_tag" >Technical Details</h2><br><ul class="bb_ul"><li> UDP data link between simulator and firmware (ports configurable in-app)<br></li><li> TCP MSP server for Configurator-style tooling<br></li><li> Coordinate transform handled in-engine (Godot Y-up ↔ aviation NED)<br></li><li> Per-axis vibration injection into the firmware's simulated IMU</li></ul><br>---<h2 class="bb_tag" >Compatibility</h2><br>You provide your own Betaflight firmware build configured for software-in-the-loop. This DLC does not include or distribute Betaflight binaries. Build instructions are available in the Betaflight project's SITL documentation. In-app setup notes are also included.<br><br>---<br><br><i>This DLC is an independent integration. It is not affiliated with, endorsed by, or sponsored by the Betaflight project. &quot;Betaflight&quot; is a trademark of its respective owners and is referenced here only to identify the firmware this integration connects to.</i><br>

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SITL Forge – External FC: Betaflight Achievements