dualmcu 0.0.8

The library version 0.0.8 for the DualMCU ONE board enables control of the RGB LED, buzzer, SSD1306 OLED display via I2C, and SD card via SPI.

DualMCU v0.0.8

The current version of the library is 0.0.8. The library is compatible with the DualMCU ONE board.

Available features:

• Control of the Multi-purpose Shield.
• Control of the SSD1306 OLED display using I2C.
• SDCard SPI support.

Installation

1. Open Thonny.
2. Go to Tools -> Manage Packages.
3. Enter dualmcu in the search bar and click Install.

Example of use

1. Connect Multi-purpose Shield to DualMCU ONE
2. Open Thonny and connect to the DualMCU ONE board.
3. Run the following code:

from machine import Pin, PWM
from dualmcu import D5
import time

# Configuración del pin D5 para PWM
buzzer = PWM(Pin(D5))

def play_tone(frequency, duration):
    buzzer.freq(frequency)
    buzzer.duty_u16(32768)  # Configura el duty cycle al 50%
    time.sleep(duration)
    buzzer.duty_u16(0)  # Apaga el buzzer

try:
    while True:
        # Toca una secuencia de tonos
        play_tone(262, 0.5)  # Do
        time.sleep(0.1)
        play_tone(294, 0.5)  # Re
        time.sleep(0.1)
        play_tone(330, 0.5)  # Mi
        time.sleep(0.1)
        play_tone(349, 0.5)  # Fa
        time.sleep(0.1)
        play_tone(392, 0.5)  # Sol
        time.sleep(0.1)
        play_tone(440, 0.5)  # La
        time.sleep(0.1)
        play_tone(494, 0.5)  # Si
        time.sleep(0.1)
        play_tone(523, 0.5)  # Do
        time.sleep(0.1)
except KeyboardInterrupt:
    # Detener el buzzer cuando se interrumpe el programa
    buzzer.deinit()

4. You should hear a sequence of tones.

Examples of use of the RGB LED and the buzzer

The following example shows how to use the RGB LED and the buzzer of the Multi-purpose Shield.

from machine import Pin
import time
from dht import DHT11
from dualmcu import *

# Create an instance of Shield
my_shield = Shield(
    pin_red=D9, pin_green=D10, pin_blue=D11,
    pin_buzzer=D5, pin_led1=D13, pin_led2=D12,
    pin_button1=D2, pin_button2=D3, pin_analog=A0
)

# Configure DHT11 sensor
sensor_dht = DHT11(Pin(D4))

try:
    while True:
        # Read DHT11 sensor
        sensor_dht.measure()
        temp_dht = sensor_dht.temperature()
        hum = sensor_dht.humidity()
        
        # Read analog sensor
        analog_value = my_shield.read_analog()
        
        # Print the values read
        print(f'Temperature: {temp_dht}°C Humidity: {hum}% Analog: {analog_value}')
        
        # Read buttons and control LEDs
        my_shield.set_led1(my_shield.read_button1() == 0)
        my_shield.set_led2(my_shield.read_button2() == 0)
        
        # Play a sequence of tones and change the LED colors
        for color, freq in zip(
            ['red', 'green', 'blue', 'yellow', 'cyan', 'magenta', 'white', 'off'],
            [262, 294, 330, 349, 392, 440, 494, 523]
        ):
            my_shield.set_led(color)
            my_shield.play_tone(freq, 0.5)
            time.sleep(0.1)

except KeyboardInterrupt:
    my_shield.deinit()

Code example I2C

'''
    Unit Electronics 2024
           (o_
    (o_    //\
    (/)_   V_/_ 
    tested code mark

'''

import machine
from dualmcu import SSD1306_I2C

i2c = machine.SoftI2C(scl=machine.Pin(5), sda=machine.Pin(4))

oled = SSD1306_I2C(128, 32, i2c)

oled.fill(1)
oled.show()

oled.fill(0)
oled.show()
oled.text('UNIT', 50, 10)
oled.text('ELECTRONICS', 25, 20)

oled.show()

SDCard SPI example

The following example shows how to use the SDCard SPI support.

[!WARNING] The SDCard must be formatted in FAT16 or FAT32, and this example only works with esp32 of the DualMCU ONE board.

import machine
import os
from dualmcu import *

# Initialize SPI interface for the SD card
spi = machine.SPI(2, baudrate=1000000, polarity=0, phase=0, sck=machine.Pin(14), mosi=machine.Pin(15), miso=machine.Pin(2))

# Initialize the SD card
sd = SDCard(spi, machine.Pin(13))

# Mount the filesystem
vfs = os.VfsFat(sd)
os.mount(vfs, "/sd")

# List files in the root of the SD card
print("Files in the root of the SD card:")
print(os.listdir("/sd"))


os.umount("/sd")