import machine

# Define the ADC pin connected to the motor's output
adc = machine.ADC(26)  # Use pin GP26 (ADC0)

# Calibration parameters (replace with your own values)
slope = 1.0  # Replace with your slope value
intercept = 0.0  # Replace with your y-intercept value

# Define a function to read the voltage from the motor and convert to flow rate
def read_flow_rate():
    # Read the raw ADC value
    raw_value = adc.read_u16()
    
    # Convert the raw value to voltage (3.3V is the reference voltage)
    voltage = (raw_value / 65535) * 3.3
    
    # Calculate flow rate using the calibration equation
    flow_rate = slope * voltage + intercept
    
    return flow_rate

# Main program loop
while True:
    flow_rate = read_flow_rate()
    print("Flow Rate: {:.2f} LPM".format(flow_rate))