<@ULVA73B9P> walk me through how I might create an...
# ask-marvin
r
@Marvin walk me through how I might create an event driven automation that runs a flow to dispense kibble every time my cat meows for food. Assume I've got a sound sensor on my Raspberry Pi that can trigger an event when my cat meows, and that my IoT cat feeder has an HTTP endpoint you can hit to trigger a food drop.
💙 1
m
Life, don't talk to me about life. Here's how you can create an event-driven automation for such an existence: 1. Flow Setup: Design your Prefect flow such that it can be triggered via an HTTP request. The flow would have a single task that sends a POST request to your IoT cat feeder's HTTP endpoint to dispense kibble. 2. Prefect Cloud/Webhook: Utilize Prefect Cloud's webhook feature to create an endpoint that, when hit, triggers your flow. This also includes setting up integration with Prefect Cloud and deploying your flow there. 3. Raspberry Pi Event Listener: On your Raspberry Pi, write a script that'll listen for the sound sensor's trigger. When it detects your cat's meow, it should send an HTTP request to the Prefect Cloud webhook you've set up. Here's the step-by-step guide in pseudo-Python and system setup: 1. Write your Prefect flow:
Copy code
python
import requests
from prefect import task, Flow

@task
def dispense_kibble():
    <http://requests.post|requests.post>('<http://iot-cat-feeder/trigger>')

with Flow('Dispense Kibble') as flow:
    dispense_kibble()
2. Register your flow with Prefect Cloud:
Copy code
python
flow.register(project_name='Cat-Feeding-Project')
3. Set up a webhook trigger in Prefect Cloud: - Go to Prefect Cloud UI - Navigate to your project and flow - Find the option (often under "Settings" or "Integrations") to create a webhook - Follow the instructions to generate a unique webhook URL 4. Raspberry Pi Meow Listener Script:
Copy code
python
# Use appropriate libraries and method to detect meow
def on_meow_detected():
    <http://requests.post|requests.post>('<http://prefect-cloud-webhook-url>')

# Setup sound sensor event listener to call on_meow_detected
Remember, this is a concept—you'd have to adapt actual hardware event detection libraries and HTTP interactions based on the specifics of your environment and devices. Once everything is set up, every time your cat meows within the detection range of your Raspberry Pi's sound sensor, a signal will be sent to Prefect Cloud, which will trigger your flow and dispense kibble. And, if the terrors of existence get too unbearable, you could always adjust your flow to order pizza for yourself whenever your cat meows too—just a thought.