IoT Actuator Hello World

What you will learn in this tutorial:

• Hardware setup to remotely control the LED
• Message Setup
• Iottly Code

Preconditions

After connecting your Raspberry Pi:

• Connect Raspberry Pi to Iottly

you can follow this tutorial.

Hardware setup

In this exercise we are going to use pin #7 as an output (actuator) to control the green LED

• Create a circuit like the one in the sketch
• This time the green wire connect the LED anode to RPi Pin #7 (through a 220Ohm resistor)

Raspberry Pi 1 Rev 1 Pinout reference here

Raspberry Pi 1 Rev 2 Pinout reference here

Raspberry Pi 2/3 Pinout reference here

Raspberry Pi zero w Pinout reference here

Let’s use Iottly to configure a command to remotely control the LED

Message Setup

Create the following message:

• Name:
  • LED_control
• Description:
  • IoT Actuator Hello World
• Keywords:
  • key: “state”
    • Type: Multiple Value
  • Values:
    • on
    • off

Iottly Code

Edit the following snippets in the “Management Scripts” panel:

• init:
  • Initialize Pin #7 to be managed as output

def init():
  #...

  #-----------------------------------------------------------------------------#

  # here your code!!

  pin = "7"
  GPIO.setup(int(pin), GPIO.OUT)

  #-----------------------------------------------------------------------------#

• LED_control :
  • Keep in mind the format of the incoming message: {"LED_control":{"state":"<on|off>"}}
  • Set the state of Pin #7 to True or False, based on the value of the 'state' keyword in the message

def LED_control(command):
  #...
  cmdpars = command["LED_control"]
  #...
  #-----------------------------------------------------------------------------#

  # here your code!!
  state = {
    'on': True,
    'off': False
  }.get(cmdpars['state'], False)  
  GPIO.output(7,state)
  #-----------------------------------------------------------------------------#

• 

• Test the “IoT Actuator Hello World” from the Console panel