from machine import Pin, PWM
import time

# Define the STEP and DIR pins
step_pin = Pin(14, Pin.OUT)
dir_pin = Pin(12, Pin.OUT)


def move_stepper_with_accel(steps, direction, min_delay=0.0005, max_delay=0.005, accel_steps=50):
    """
    Function to move the stepper motor with acceleration and deceleration.
    
    Args:
        steps (int): Total number of steps to move.
        direction (bool): Direction of movement (True for one direction, False for the opposite).
        min_delay (float): Minimum time delay between steps (fastest speed).
        max_delay (float): Maximum time delay between steps (slowest speed).
        accel_steps (int): Number of steps to accelerate and decelerate.
    """
    # Ensure accel_steps doesn't exceed total steps
    accel_steps = min(accel_steps, steps // 2)
    
    # Set the direction
    dir_pin.value(direction)
    
    # Acceleration phase
    for i in range(accel_steps):
        delay = max_delay - (i / accel_steps) * (max_delay - min_delay)
        step_pin.value(1)
        time.sleep(delay)
        step_pin.value(0)
        time.sleep(delay)
    
    # Constant speed phase
    for i in range(steps - 2 * accel_steps):
        step_pin.value(1)
        time.sleep(min_delay)
        step_pin.value(0)
        time.sleep(min_delay)
    
    # Deceleration phase
    for i in range(accel_steps):
        delay = min_delay + (i / accel_steps) * (max_delay - min_delay)
        step_pin.value(1)
        time.sleep(delay)
        step_pin.value(0)
        time.sleep(delay)

# Example usage
print("Moving stepper motor with acceleration...")
while True:
    move_stepper_with_accel(steps=400, direction=True, min_delay=0.0005, max_delay=0.005, accel_steps=100)  # Forward
    time.sleep(1)  # Pause for a second
    move_stepper_with_accel(steps=400, direction=False, min_delay=0.0005, max_delay=0.005, accel_steps=100)  # Backward
    time.sleep(1)  # Pause for

# Function to move the stepper
def move_stepper(steps, direction, delay=0.001):
    """
    Function to move the stepper motor.
    
    Args:
        steps (int): Number of steps to move.
        direction (bool): Direction of movement (True for one direction, False for the opposite).
        delay (float): Time delay between steps in seconds (controls speed).
    """
    # Set the direction
    dir_pin.value(direction)
    
    # Generate pulses for the steps
    for _ in range(steps):
        step_pin.value(1)  # Set STEP pin high
        time.sleep(delay)  # Wait
        step_pin.value(0)  # Set STEP pin low
        time.sleep(delay)  # Wait

# Example usage
print("Moving stepper motor...")
while True:
    move_stepper(steps=200, direction=True, delay=0.001)  # Move 200 steps forward
    move_stepper(steps=200, direction=False, delay=0.001)  # Move 200 steps backward
    print("Done.")

# Rui Santos & Sara Santos - Random Nerd Tutorials
# Complete project details at https://RandomNerdTutorials.com/micropython-i2c-lcd-esp32-esp8266/

from machine import Pin, SoftI2C
from machine_i2c_lcd import I2cLcd
from time import sleep

# Define the LCD I2C address and dimensions
I2C_ADDR = 0x27
I2C_NUM_ROWS = 2
I2C_NUM_COLS = 16

# Initialize I2C and LCD objects
i2c = SoftI2C(sda=Pin(21), scl=Pin(22), freq=400000)

# for ESP8266, uncomment the following line
#i2c = SoftI2C(sda=Pin(4), scl=Pin(5), freq=400000)

lcd = I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)

lcd.putstr("It's working :)")
sleep(4)

try:
    while True:
        # Clear the LCD
        lcd.clear()
        # Display two different messages on different lines
        # By default, it will start at (0,0) if the display is empty
        lcd.putstr("Hello World!")
        sleep(2)
        lcd.clear()
        # Starting at the second line (0, 1)
        lcd.move_to(0, 1)
        lcd.putstr("Hello World!")
        sleep(2)

except KeyboardInterrupt:
    # Turn off the display
    print("Keyboard interrupt")
    lcd.backlight_off()
    lcd.display_off()