Don’t Neglect to Load RC Hyperlink Preset in Betaflight!

In Betaflight, it’s best to load the suitable RC Hyperlink Preset based mostly on the packet charge you might be utilizing. In any other case, it may trigger feedforward points that result in vibrations and oscillations in your drone. On this article, we’ll clarify why this issues and the right way to set it up accurately.

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Why Do We Want RC Hyperlink Preset in Betaflight?

Each time an RC packet arrives, Betaflight updates the channel values. This implies your uncooked RC command just isn’t a superbly clean line — as an alternative, it’s a stepwise sign that jumps from one worth to the subsequent at every packet replace. This “stair-stepping” occurs in any respect packet charges, simply extra continuously at increased charges.

The issue is that Betaflight’s Feedforward reacts to adjustments in RC instructions. With a stepwise sign, it reacts strongly to every step, creating sudden spikes. Because of this, the quad can oscillate throughout stick actions, producing undesirable noise and jitter.

Within the blackbox log instance under, you may see the spikes within the Feedforward (purple line) when shifting the stick.

To stop this, Betaflight applies smoothing (low-pass filtering) to the RC command earlier than Feedforward is utilized. This reduces harsh sign steps and makes management inputs behave extra like a clean sign, stopping Feedforward from overreacting.

Learn how to Apply RC Hyperlink Preset

The correct quantity of smoothing will depend on your packet charge (for instance: 50Hz, 150Hz, 250Hz, or 500Hz). If Feedforward and filtering are usually not matched to your packet charge, the PID loop could behave poorly and the quad could fly badly.

Because of this the ExpressLRS presets make such a noticeable distinction. The preset routinely adjusts:

• Feedforward settings
• RC smoothing
• Related filtering values

In Betaflight Configurator:

• Open the Presets tab
• Seek for “expresslrs”
• Choose the Hyperlink Preset that matches your packet charge
• If an actual match isn’t obtainable, select the closest preset under your packet charge

That’s it. Whenever you change packet charges, don’t neglect to use the suitable preset once more.