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RB01SG0D8310182648008000000000000000000018FC2600000615BDDLKFC329603E07B5182139011E8209B5433A9D3

CTBC 547A

NPN General Purpose Amplifier

i want you to act as a software engineer. provide an example micropython script that uses concurrent processing with uasyncio on a multicore esp32 microcontroller. one thread is meant to subscribe to an mqtt topic. another thread to read an adc. the third thread to wait for a button push. the script should contain explicit code for the button waiting logic that sends an mqtt message upon pushing a button.

Certainly! Here's an example Micropython script that uses concurrent processing with uasyncio on a multicore ESP32 microcontroller. It includes three threads: one for subscribing to an MQTT topic, another for reading an ADC, and a third for waiting for a button push and sending an MQTT message upon button press.

import uasyncio as asyncio
from machine import Pin, ADC
from umqtt.simple import MQTTClient

# MQTT Configuration
mqtt_broker = "mqtt.example.com"
mqtt_topic = "my_topic"
mqtt_client_id = "esp32_client"

# Button Configuration
button_pin = Pin(14, Pin.IN, Pin.PULL_UP)

# ADC Configuration
adc_pin = Pin(34)
adc = ADC(adc_pin)

# MQTT Callback
def mqtt_callback(topic, msg):
    print("Received MQTT message:", msg)

# MQTT Subscriber Task
async def mqtt_subscriber():
    client = MQTTClient(mqtt_client_id, mqtt_broker)
    client.set_callback(mqtt_callback)
    client.connect()
    client.subscribe(mqtt_topic)

    while True:
        client.wait_msg()

# ADC Reader Task
async def adc_reader():
    while True:
        adc_value = adc.read()
        print("ADC Value:", adc_value)
        await asyncio.sleep(1)

# Button Waiter Task
async def button_waiter():
    button_state = button_pin.value()
    while True:
        if button_pin.value() != button_state:
            button_state = button_pin.value()
            if button_state == 0:
                print("Button Pressed!")
                mqtt_client = MQTTClient(mqtt_client_id, mqtt_broker)
                mqtt_client.connect()
                mqtt_client.publish(mqtt_topic, "Button Pressed!")
                mqtt_client.disconnect()
        await asyncio.sleep_ms(100)

# Main Function
def main():
    loop = asyncio.get_event_loop()
    loop.create_task(mqtt_subscriber())
    loop.create_task(adc_reader())
    loop.create_task(button_waiter())
    loop.run_forever()

# Run the Main Function
if __name__ == "__main__":
    main()

In this script, the mqtt_subscriber function sets up an MQTT client, connects to the broker, and subscribes to the specified topic. It then enters a loop where it waits for incoming MQTT messages using client.wait_msg().

The adc_reader function continuously reads the ADC value from the specified pin and prints it every second using adc.read().

The button_waiter function continuously checks the state of the button using button_pin.value(). If the button state changes (pressed or released), it sends an MQTT message with the button status.

The main function creates tasks for each of the three threads and runs the event loop using loop.run_forever().

Please note that you may need to install the required libraries (uasyncio and umqtt.simple) before running this script on your ESP32 microcontroller.

i want you to act as a software engineer. provide an example micropython script that uses concurrent processing with uasyncio on a multicore esp32 microcontroller. one thread is meant to subscribe to an mqtt topic. another thread to read an adc. the third thread to wait for a button push. the script should contain explicit code for the button waiting logic that sends an mqtt message upon pushing a button. two of the threads should run on one core and the third one on the second core.

Certainly! Here's an updated example Micropython script that uses concurrent processing with uasyncio on a multicore ESP32 microcontroller. It includes three threads: one for subscribing to an MQTT topic, another for reading an ADC, and a third for waiting for a button push. The first two threads will run on one core, and the third thread will run on the second core.

import uasyncio as asyncio
from machine import Pin, ADC
from umqtt.simple import MQTTClient
import _thread

# MQTT Configuration
mqtt_broker = "mqtt.example.com"
mqtt_topic = "my_topic"
mqtt_client_id = "esp32_client"

# Button Configuration
button_pin = Pin(14, Pin.IN, Pin.PULL_UP)

# ADC Configuration
adc_pin = Pin(34)
adc = ADC(adc_pin)

# MQTT Callback
def mqtt_callback(topic, msg):
    print("Received MQTT message:", msg)

# MQTT Subscriber Task
async def mqtt_subscriber():
    client = MQTTClient(mqtt_client_id, mqtt_broker)
    client.set_callback(mqtt_callback)
    client.connect()
    client.subscribe(mqtt_topic)

    while True:
        client.wait_msg()

# ADC Reader Task
async def adc_reader():
    while True:
        adc_value = adc.read()
        print("ADC Value:", adc_value)
        await asyncio.sleep(1)

# Button Waiter Task
def button_waiter():
    button_state = button_pin.value()
    while True:
        if button_pin.value() != button_state:
            button_state = button_pin.value()
            if button_state == 0:
                print("Button Pressed!")
                mqtt_client = MQTTClient(mqtt_client_id, mqtt_broker)
                mqtt_client.connect()
                mqtt_client.publish(mqtt_topic, "Button Pressed!")
                mqtt_client.disconnect()
        asyncio.sleep_ms(100)

# Main Function
def main():
    loop = asyncio.get_event_loop()
    loop.create_task(mqtt_subscriber())
    loop.create_task(adc_reader())

    # Run button_waiter on the second core
    _thread.start_new_thread(button_waiter, ())

    loop.run_forever()

# Run the Main Function
if __name__ == "__main__":
    main()

In this updated script, the mqtt_subscriber and adc_reader functions remain the same as before. They are created as tasks in the event loop using loop.create_task().

The button_waiter function is modified to run on a separate core using the _thread.start_new_thread() function. This function starts a new thread and assigns it to the second core, allowing it to run concurrently with the other two threads.

Please note that running threads on separate cores requires the micropython-ulab library to be installed on your ESP32 microcontroller. You can install it using the upip package manager by running upip.install('micropython-ulab') before running this script.