---
title: Flight Controller Passthrough (Beta)
slug: legacy-docs-gk-3-1/flight-controller-passthrough-beta
icon: 🛰️
createdAt: 2026-01-12T03:24:05.458Z
---

:::hint{type="warning"}
This feature is only available in the 3.1.1-microdrive\_lp-fc\_passthrough beta version. This feature is in beta, you may encounter bugs or instability and there is no guarantee of ongoing support for this implementation of passthrough
:::

The ESC supports configuration using the Hargrave Configurator over the serial signal lines through flight controller passthrough (FC passthrough). A compatible flight controller and version of the Hargrave Configurator are required. More details can be found below:

:::CtaButton{label="Flight Controller Passthrough" docId="Tje-ADTDA4Hq2UTLj78tH" openInNewTab="true"}

:::

# Changelog

This beta version is based on the 3.1.0 release.

## 3.1.1-fc\_passthrough - 12th January 2026

**Build Hash: **4b59e2ec

### Major Changes

3.1.1-fc\_passthrough is a beta release supporting flight controller passthrough (FC passthrough) for more convenient configurator for vehicles using serial communications. **This release does not have ARINC 825 support.** FC passthrough is in beta, bugs or instability may be encountered, continued support for this implementation of FC passthrough is not guaranteed.

### New Features

- **Flight Controller Passthrough** - Flight controller passthrough allows the Hargrave Configurator to communicate with the motor controller using the serial (PWM/DShot) wires.

### Other Changes

- Serial signal detection code updated to detect passthrough.

### Bug Fixes

- Serial signal handling code is more noise resilient.

\* FC Passthrough Requires Hargrave Configurator >=v1.12.0