gpio

README

---

title: GPIO weight: 4611

GPIO

This activity allows you to control the GPIO pins on a Raspberry Pi

Installation

Flogo Web

This activity comes out of the box with the Flogo Web UI

Flogo CLI

flogo add activity github.com/TIBCOSoftware/flogo-contrib/activity/gpio

Schema

Inputs and Outputs:

{
  "input":[
    {
      "name": "method",
      "type": "string",
      "required": true,
      "allowed" : ["Direction", "Set State", "Read State", "Pull"]
    },
    {
      "name": "pinNumber",
      "type": "integer",
      "required": true
    },
    {
      "name": "direction",
      "type": "string",
      "allowed" : ["Input", "Output"]
    },
    {
      "name": "state",
      "type": "string",
      "allowed" : ["High", "Low"]
    },

    {
      "name": "Pull",
      "type": "string",
      "allowed" : ["Up", "Down", "Off"]
    }
  ],
  "output": [
    {
      "name": "result",
      "type": "integer"
    }
  ]
}

Settings

Setting	Required	Description
method	True	The method to take action for specified pin (Allowed values are Direction, Set State, Read State, and Pull)
pinNumber	True	The pin number of the GPIO
direction	False	Set the direction of the pin (Allowed values are Input and Output)
state	False	Set the state of the pin (Allowed values are High and Low)
Pull	False	Pull the pin to the specified value (Allowed values are Up, Down, and Off)
result	False	The result of the operation

Examples

Get pin state

The below example retrieves the state of pin 23:

"input": {
  "method": "Read State",
  "npinNumberame": 23
}

Set pin state

The below example sets the state of pin 23 to High:

"input": {
  "method": "Set State",
  "npinNumberame": 23,
  "state": "High"
}

Change pin's direction

The below example changes the direction of the pin to Output:

"input": {
  "method": "Direction",
  "npinNumberame": 23,
  "direction": "Output"
}

Documentation

Index

• func NewActivity(metadata *activity.Metadata) activity.Activity
• type GPIOActivity
  • func (a *GPIOActivity) Eval(context activity.Context) (done bool, err error)
  • func (a *GPIOActivity) Metadata() *activity.Metadata

Functions

func NewActivity

func NewActivity(metadata *activity.Metadata) activity.Activity

NewActivity creates a new GPIOActivity

Types

type GPIOActivity

type GPIOActivity struct {
	// contains filtered or unexported fields
}

func (*GPIOActivity) Eval

func (a *GPIOActivity) Eval(context activity.Context) (done bool, err error)

Eval implements api.Activity.Eval - Invokes a REST Operation

func (*GPIOActivity) Metadata

func (a *GPIOActivity) Metadata() *activity.Metadata

Metadata returns the activity's metadata