Constant Value Input » History » Revision 2
Revision 1 (Adam Klama, 06/21/2026 02:15 PM) → Revision 2/5 (Adam Klama, 06/21/2026 03:06 PM)
# Constant Value Input ## Overview A **Constant Value Input** simply outputs a single, fixed number. It has no sensor — its value never changes on its own, but you can **tune it** from the app. Use it as an adjustable constant or threshold that other IO can reference by alias: a limit fed into a [Compare Input](Compare_Input), Input](Compare-Input.md), a fixed operand for a [Math / Divide Input](Math_Divide_Input), Input](Math-Divide-Input.md), or a calibration offset used by a map. ## Prerequisites & hardware None. This is a logical input with no source inputs — it stands on its own. You only need somewhere to use it: another input, output or map that will reference it by **alias**. ## Add it in the app 1. Add a new input and choose **Constant Value Input** as the type. 2. Give it a clear **alias** (e.g. `Shift Pressure Limit`). 3. Enter the **value**. ## Settings reference > Schema: `config/ConstantValueConfiguration.proto`. | Setting | Meaning | Unit | Range / values | Notes | |---|---|---|---|---| | **Value** | The fixed value this input reports | — (the value referencing IO expect) | sint32 | Can be negative. Change it any time to retune the constant; everything referencing this input picks up the new value. | ## Common settings Constant Value Input also uses the shared setting — alias. See [Common IO Settings](Common_IO_Settings). Settings](../Common-IO-Settings.md). ## Example — a tunable shift-pressure limit 1. Type **Constant Value Input**, alias `Shift Pressure Limit`. 2. Set **Value** to `850` (the limit in your pressure units). 3. In a [Compare Input](Compare_Input), Input](Compare-Input.md), compare your measured pressure against `Shift Pressure Limit`. To raise the limit later, edit this one value rather than every place it is used. ## Troubleshooting - **The value never updates downstream:** confirm the other IO references this input by its **alias**, not a hard-coded number. - **Wrong magnitude:** make sure the value is in the same units/scaling the consumer expects (e.g. if a map works in tenths, enter `850` for 85.0). ## Related - [Compare Input](Compare_Input) Input](Compare-Input.md) — compare a signal against a value or constant. - [Math / Divide Input](Math_Input) Input](Math-Divide-Input.md) — combine inputs, often with a constant.