Edges

Edges are the lines that connect nodes together. They carry information and signals from one node to another, creating a flow of data and actions.

To create an edge, simply click and drag from an output handle (on the right side of a node) to an input handle (on the left side of another node). The line that appears is the edge connecting them.

Examples

Flows can be simple or complex, depending on the number of nodes and the connections between them.

Simple flow

In this example, we have a simple flow with two nodes connected by an edge. When a button connected to pin 6 is pressed, the LED connected to pin 13 (the built-in LED on most Arduino boards) turns on.

What are pins? Pins are the numbered connection points on your microcontroller where you plug in components like buttons, LEDs, and sensors. Each pin has a number (like pin 6 or pin 13) so you know where to connect things.

flowchart LR
    A[Button]-- Down handle -->B[LED]

Download simple flow example

Complex flow

In this example, we have a more complex flow with multiple nodes connected by edges.

Here's what happens step by step:

1. When a button connected to pin 6 is pressed, a counter node increases its count by 1
2. The counter's value is then converted (mapped) to a different range of numbers
3. A compare node checks if the mapped value is greater than a certain number (N)
4. If the value is greater than N, the LED on pin 13 turns on
5. Otherwise (else), a piezo buzzer on pin 11 makes a sound

This creates a simple game or interaction where pressing the button multiple times either lights up the LED or plays a sound, depending on how many times you've pressed it.

flowchart LR
    A[Button] -- Active handle --> B[Counter]
    B -- Change handle --> C[Map]
    C -- Change handle --> D[if..else]
    D -->|True handle| E[Piezo]
    D -->|False handle| F[Piezo]

Download complex flow example