Temporary.py

from machine import Pin, ADC
import utime
import math
import time


thermistor = ADC(26) # Thermistors measure temperature based on resistance changes.

light_sensor = ADC(28) # Light sensors measure light intensity.

data_collection_led = Pin(12, Pin.OUT) # This LED is used to illuminate the TLC plate for data collection.

actuator_leds = [Pin(i, Pin.OUT) for i in (13, 15, 14)] # These LEDs simulate various actuator states or stages in the experiment.

ir_emitter = Pin(11, Pin.OUT) # The IR emitter sends an IR beam that the IR sensor can detect.
 
ir_sensor = ADC(27) # The IR sensor detects the IR beam from the IR emitter, used to determine paper position.


# outdated code but it may be useful to keep around
'''"""Constants for calculating temperature from the thermistor's resistance."""
B_CONSTANT = 3933  # The B constant of the thermistor, an empirical value specific to the thermistor.
RESISTANCE_AT_25_C = 10000  # The resistance of the thermistor at 25 degrees Celsius, in ohms.
SERIES_RESISTOR = 10000  # The resistance of the series resistor used in the voltage divider, in ohms.

def read_temperature():
    # Read the analog value from the thermistor and convert it to a voltage.
    value = thermistor.read_u16() * 3.3 / 65535
    # Calculate the thermistor's resistance from the voltage divider equation.
    resistance = (3.3 * SERIES_RESISTOR / value) - SERIES_RESISTOR
    # Calculate the temperature using the simplified Steinhart-Hart equation and the B constant.
    temperature = 1/(math.log(resistance / RESISTANCE_AT_25_C) / B_CONSTANT + 1 / 298.15) - 273.15
    return temperature'''


# new thermistor detection code which will detect a fluctuation in temperature.
def interpret_thermistor():
    temp_thermistor_value = thermistor.read_u16()
    time.sleep(1)
    if ((temp_thermistor_value - thermistor.read_u16()) > 1000) or ((temp_thermistor_value - thermistor.read_u16()) < -1000):
        return True
    else:
        return False


def read_light_intensity():
    """Read the raw analog value from the light sensor, which is proportional to the light intensity, then decide which colour it matches up with."""
    while light_sensor.read_u16() > 50000:
        if (light_sensor.read_u16() >19600 and light_sensor.read_u16() <20200):
            return "blue"
        elif(light_sensor.read_u16() > 29000 and light_sensor.read_u16() <29600):
            return "red-pink"
        elif(light_sensor.read_u16() > 34500 and light_sensor.read_u16() <34900):
            return "pink"
        elif(light_sensor.read_u16() > 32000 and light_sensor.read_u16() <32800):
            return "yellow"
        elif(light_sensor.read_u16() > 33400 and light_sensor.read_u16() <34200):
            return "white"


def toggle_data_collection_led(state):
    """Set the state of the data collection LED: 1 for on, 0 for off."""
    data_collection_led.value(state)


def activate_actuator_led(led_number, state):
    """Activate or deactivate a specific actuator LED based on its number and the desired state. """
    if 0 <= led_number < len(actuator_leds):
        actuator_leds[led_number].value(state)

    # turns off the leds
def reset_leds():
    activate_actuator_led(0,0)
    activate_actuator_led(1,0)
    activate_actuator_led(2,0)

def check_paper_position():
    # Ensure the IR emitter is on to send a beam to the IR sensor.
    ir_emitter.value(1)
    # Check if the IR sensor detects the beam. If not, the beam is interrupted (like by the paper), indicating the desired position.
    return ir_sensor.read_u16()


def experiment_sequence():

    reset_leds()

    # Check for the correct paper position using the IR sensor and emitter.
    print("Checking paper position...")
    while check_paper_position()<5000:
        time.sleep(0)  # Wait for the paper to reach the correct position.
    print("Paper in position.")

    # Activate an actuator LED to simulate reaching a stage in the experiment.
    activate_actuator_led(0, 1)
    
    # Monitor the temperature with the thermistor until it indicates the saturation solution has reached the desired height.
    print("Monitoring temperature...")
    while interpret_thermistor() is False:  
        time.sleep(0)
    print("Desired temperature reached.")
    
    # Activate an actuator LED to simulate reaching a stage in the experiment.
    activate_actuator_led(1, 1)  # Example: Turn on the first actuator LED.
    
    # Illuminate the TLC plate with the data collection LED and read the light intensity from the light sensor.
    toggle_data_collection_led(1)  # Turn on the data collection LED.
    print("Collecting data")
    light_intensity = read_light_intensity()
    print(f"Light intensity/colour: {light_intensity}")
    utime.sleep(1)
    toggle_data_collection_led(0)  # Turn off the data collection LED after reading the light intensity.
    
    # Activate an actuator LED to indicate completion of experiment
    activate_actuator_led(2, 1)

    # Signal the completion of the experiment.
    print("Experiment complete.")

    utime.sleep(10)
    reset_leds()

# Start the experiment sequence.
experiment_sequence()