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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.