# Rule Function
## Functions
Functions in Qubitro allow you to **process, modify, and automate** actions based on incoming device data. There are multiple function types, each serving a specific purpose.
### How It Works
When data is received from a device, Qubitro processes it through a Rule Function in the following steps:
{% stepper %}
{% step %}
**Check Debounce Period**
Prevents excessive triggering by ensuring the rule is not executed too frequently.
{% endstep %}
{% step %}
**Evaluate Condition**
Determines whether the incoming data meets the defined criteria.
{% endstep %}
{% step %}
**Trigger Action**
If the condition is met, the configured action is executed immediately.
{% endstep %}
{% endstepper %}
{% @mermaid/diagram content="graph LR;
A\[Data Received by Qubitro] --> B{Within Debounce Period?};
B -- Yes --> C\[Ignore Action Within Chosen Time Frame];
B -- No --> D{Check Condition};
D -- No --> E\[Ignore Data];
D -- Yes --> F\[Trigger Action];
F --> G\[Send Email / Slack Notification / Other Actions];
%% Style Adjustments
style A fill:#d9d9d9,stroke:#000,color:#000;
style B fill:#f2f2f2,stroke:#000,color:#000;
style C fill:#f2f2f2,stroke:#000,color:#000;
style D fill:#f2f2f2,stroke:#000,color:#000;
style E fill:#CBC3E3,stroke:#000,color:#000; %% Purple from your previous diagrams
style F fill:#CBC3E3,stroke:#000,color:#000; %% Purple from your previous diagrams
style G fill:#e0e0e0,stroke:#000,color:#000;" %}
{% hint style="warning" %}
Rule Functions operate **only on** real-time data – They **cannot** query historical data from the database.
{% endhint %}
{% hint style="info" %}
Each Rule Function executes a single pre-configured action – It **does not support** executing multiple actions within one function.
{% endhint %}
### Creating a Rule Function
{% stepper %}
{% step %}
#### Step 1: Navigate to the Device Page
Go to the **Devices** page, select the device you want to create a function for, and navigate to its **detail page**.
{% endstep %}
{% step %}
#### Step 2: Open the Functions Tab
Click on the **Functions** tab, then click on **Create function**.
{% endstep %}
{% step %}
#### Step 3: Choose a Function Type
Click the **Get started** button and follow the required steps to configure the function.
{% hint style="info" %}
For detailed guidance on each function type, visit its dedicated documentation page.
{% endhint %}
{% endstep %}
{% step %}
#### Step 4: Configure and Save
Each function type has **unique configuration options**. Follow the specific instructions for the selected function type.
{% endstep %}
{% endstepper %}
### Condition Configuration
Rule Functions in Qubitro allow you to define conditions that determine whether an action should be triggered based on incoming device data.
There are two ways to configure conditions:
#### JavaScript Logic Builder
For users familiar with coding, the JavaScript Logic Builder allows custom condition creation using JavaScript syntax.
For a deeper dive, read our guide:
{% content-ref url="" %}
[How to Use JavaScript for Custom Rule Conditions in Qubitro](https://app.gitbook.com/s/llOFTfRA5L4YRnakI84m/functions-and-data-processing/how-to-use-javascript-for-custom-rule-conditions-in-qubitro)
{% endcontent-ref %}
#### Visual Condition Builder
The Visual Condition Builder is a no-code option that allows users to define conditions using dropdown menus.
