Mux Input » History » Revision 2
Revision 1 (Adam Klama, 06/21/2026 02:33 PM) → Revision 2/3 (Adam Klama, 06/21/2026 03:16 PM)
# Mux Input ## Overview A **Mux Input** (multiplexer) passes through **one of up to eight data inputs**, chosen by a separate **selector** input — like a rotary selector switch. The selector's value (0–7) decides which data input appears at the output. Use it to switch between sources at runtime: different calibration sets, sensor banks, or operating-mode values. ## Prerequisites & hardware You need: - A **selector input** whose value is `0`–`7` — any existing input, by alias. This is often a [Constant Value Input](Constant_Value_Input), Input](Constant-Value-Input.md), an [Analog Switch Input](Analog_Switch_Input) Input](Analog-Switch-Input.md) or a mode value. - One or more **data inputs** to choose between (up to eight), each by alias. ## Add it in the app 1. Add a new input and choose **Mux Input** as the type. 2. Choose the **selector** and **data inputs**. 3. Give it a clear **alias** (e.g. `Active Pressure Target`). 4. Assign the **selector input**, then fill **data input 0…7** with the sources you want to switch between. ## Settings reference > Schema: `config/MuxInputConfigData.proto`. | Setting | Meaning | Unit | Range / values | Notes | |---|---|---|---|---| | **Selector input** | Chooses which data input is passed through | — | an existing input (by alias), value `0`–`7` | Value `0` selects **Data input 0**, `1` selects **Data input 1**, … `7` selects **Data input 7**. | | **Data inputs 0–7** | The eight candidate inputs to switch between | — | up to 8 existing inputs (by alias) | The output equals whichever one the selector points to. You need only fill the slots you use. | **How it selects:** the output simply mirrors the data input whose slot number matches the current **selector** value. A selector of `2` passes **Data input 2** straight through. ## Common settings Mux Input also uses the shared setting — alias. See [Common IO Settings](Common_IO_Settings). Settings](../Common-IO-Settings.md). ## Example — switch pressure target by drive mode 1. Type **Mux Input**, alias `Active Pressure Target`. 2. **Selector input** = your `Drive Mode` value (0 = Comfort, 1 = Sport). 3. **Data input 0** = `Comfort Pressure` constant. 4. **Data input 1** = `Sport Pressure` constant. 5. The output now follows the constant for whichever mode is selected. ## Troubleshooting - **Output stuck on one source:** check the **selector** value actually changes and lands on `0`–`7`. - **Unexpected / zero output:** a selected slot may be empty — fill **Data input N** for every selector value you use. - **Selector out of range:** values above `7` have no matching slot; clamp or map the selector so it stays within `0`–`7`. ## Related - [Constant Value Input](Constant_Value_Input) Input](Constant-Value-Input.md) — fixed values to switch between. - [Analog Switch Input](Analog_Switch_Input) Input](Analog-Switch-Input.md) — a multi-position selector source. - [Map Input](Map_Input) Input](Map-Input.md) — interpolate a value instead of selecting one.