"""
    Chapter 2 - Cooperative multitasking using asyncio, page 37
                Beningo, Jacob.
                MicroPython Projects; A do-it-yourself guide to embedded
                developers to build a range of applications using Python.
                Packt, 2020
    
    https://github.com/peterhinch/micropython-async/tree/master
    
    https://docs.micropython.org/en/latest/library/asyncio.html

    https://randomnerdtutorials.com/micropython-esp32-esp8266-asynchronous-programming/
"""

import asyncio
from machine import Pin

led_blue = Pin(23, Pin.OUT, value= 1)
led_yellow = Pin(22, Pin.OUT, value= 0)

# Define coroutine function
async def task1():
    while True:
        led_blue.value(not led_blue.value())
        await asyncio.sleep_ms(500)

# Define coroutine function
async def task2():
    while True:
        led_yellow.value(not led_yellow.value())
        await asyncio.sleep_ms(500)


# Define the main function to run the event loop
async def main():
    # Create tasks for blinking two LEDs concurrently
    asyncio.create_task(task1())
    asyncio.create_task(task2())

# Create and run the event loop
loop = asyncio.get_event_loop()  
loop.create_task(main())  # Create a task to run the main function
loop.run_forever()  # Run the event loop indefinitely