MicroPython • Code getting stuck after count

Code:

from machine import ADC, Pin, I2Cimport machineimport timefrom lcd_api import LcdApifrom pico_i2c_lcd import I2cLcdI2C_ADDR     = 39I2C_NUM_ROWS = 4I2C_NUM_COLS = 20i2c = I2C(0, sda=machine.Pin(0), scl=machine.Pin(1), freq=400000)lcd = I2cLcd(i2c, I2C_ADDR, I2C_NUM_ROWS, I2C_NUM_COLS)# Pin numbersfloat_switch_pin = Pin(14, Pin.IN, Pin.PULL_UP)   # Pin connected to float switch with pull-up resistorpump_relay_pin = Pin(16, Pin.OUT)                      # Pin connected to relay#lights_relay_pin = Pin(17, Pin.OUT)#solenoid_relay_pin = Pin(18, Pin.OUT)led_pin = Pin(17, Pin.OUT)                        # Pin connected to LEDsoil_moisture_pin = ADC(Pin(26))               # Pin connected to soil moisture sensor (ADC pin)sensor_temp = machine. ADC(4)temp_conversion_factor = 3.3 / (65535)#Calibraton valuesmin_moisture=19200max_moisture=50204readDelay = 0.5# Define RGB LED pinsRED_PIN = 10   # Changed pinGREEN_PIN = 11 # Changed pinBLUE_PIN = 12  # Changed pin# Initialize RGB LED pins as outputsred_led = Pin(RED_PIN, Pin.OUT)green_led = Pin(GREEN_PIN, Pin.OUT)blue_led = Pin(BLUE_PIN, Pin.OUT)# Function to check float switch statusdef check_float_switch():    return not float_switch_pin.value()  # Inverse logic for float switch# Function to control relaydef control_relay(on=True):    pump_relay_pin.value(1 if on else 0)    #lights_relay_pin.value(1 if on else 0)    #solenoid_relay_pin.value(1 if on else 0)# Function to control LEDdef control_led(on=True):    led_pin.value(1 if on else 0)# Function to read soil moisturedef check_soil_moisture():    return soil_moisture_pin.read_u16()# Function to blink RGB LEDdef blink_rgb(color, times):    for _ in range(times):        color.on()  # Turn on the color        time.sleep(1)  # Wait for 1 second        color.off()  # Turn off the color        time.sleep(1)  # Wait for 1 second        # Function to fast blink RGB LEDdef rapid_blink_rgb(color, times):    for _ in range(times):        color.on()        time.sleep(0.5)        color.off()        time.sleep(0.5)def Pb_Switch_INT(pin):         # PB_Switch Interrupt handler    global Pb_Switch_State      # reference the global variable    Pb_Switch.irq(handler=None) # Turn off the handler while it is executing            if (Pb_Switch.value() == 1) and (Pb_Switch_State == 0):  # Pb_Switch is active (High) and Pb_Switch State is currently Low    #if (Pb_Switch.value() == 1): # Pb_Switch is active (High)        Pb_Switch_State = 1     # Update current state of switch        pump_relay_pin.value(0)        blue_led.value(1)        lcd.move_to(0,4)        lcd.putstr("                    ")        lcd.move_to(0,1)        lcd.putstr("                    ")        lcd.move_to(0,2)        lcd.putstr("                    ")        lcd.move_to(0,4)        lcd.putstr("PUMP OVERRIDE ON")        print("PUMP OVERRIDE ON")             # Do required action here                         elif (Pb_Switch.value() == 0) and (Pb_Switch_State == 1): # Pb_Switch is not-active (Low) and Pb_Switch State is currently High    #elif (Pb_Switch.value() == 0): # Pb_Switch is not-active (Low)        Pb_Switch_State = 0     # Update current state of switch        pump_relay_pin.value(1)        blue_led.value(0)        lcd.move_to(0,4)        lcd.putstr("                    ")        lcd.move_to(0,1)        lcd.putstr("                    ")        lcd.move_to(0,2)        lcd.putstr("                    ")        lcd.move_to(0,4)        lcd.putstr("PUMP OVERRIDE OFF")        print("PUMP OVERRIDE OFF \n")         # Do required action here        time.sleep(2)        lcd.move_to(0,4)        lcd.putstr("                    ")    Pb_Switch.irq(handler=Pb_Switch_INT)    #Creat an 'object' for our Pb_Switch change of statePb_Switch = machine.Pin(15,machine.Pin.IN,machine.Pin.PULL_DOWN)#Setup the Interrupt Request Handling for Pb_Switch change of statePb_Switch.irq(trigger=machine.Pin.IRQ_RISING | machine.Pin.IRQ_FALLING, handler=Pb_Switch_INT)#Preset the STATE variable for the Pb_SwitchPb_Switch_State = Pb_Switch.value()print("Pb_Switch State=", Pb_Switch_State)# Calculate total seconds for 4 hourstotal_seconds = 4 * 60 * 60# Initialize variables to keep track of the last displayed timelast_hours = -1last_minutes = -1last_seconds = -1# Print booting message and wait for 5 secondslcd.clear()lcd.move_to(0,4)lcd.putstr("Booting Up.")lcd.move_to(0,2)lcd.putstr("Please Wait...")control_relay(True) # Turn off relayblink_rgb(green_led, 3)  # Blink green LED three times during bootingtime.sleep(2)  # Wait for 2 seconds after booting#soil_moisture = check_soil_moisture()#print("Soil moisture:", soil_moisture)#time.sleep(2)#soil_moisture = check_soil_moisture()#print("Soil moisture:", soil_moisture)#time.sleep(2)#soil_moisture = check_soil_moisture()#print("Soil moisture:", soil_moisture)#time.sleep(2)#soil_moisture = check_soil_moisture()#print("Soil moisture:", soil_moisture)#time.sleep(2)#soil_moisture = check_soil_moisture()#print("Soil moisture:", soil_moisture)#time.sleep(2)#soil_moisture = check_soil_moisture()#print("Soil moisture:", soil_moisture)#time.sleep(2)# Main loopwhile True:    lcd.clear()    lcd.move_to(0,4)    lcd.putstr("Checking float")    lcd.move_to(0,1)    lcd.putstr("switch...")    time.sleep(1)    #print("Checking float switch...")    if check_float_switch():  # Water in tank        lcd.clear()        lcd.move_to(0,4)        lcd.putstr("We got water ")        lcd.move_to(0,1)        lcd.putstr("in the tank folks.")        #print("We got water in the tank folks.")        rapid_blink_rgb(blue_led, 3)# Blue LED Flash to say water level ok        reading = sensor_temp.read_u16() * temp_conversion_factor        temperature = 27 - (reading - 0.706)/0.00172        lcd.clear()        lcd.move_to(0,4)        lcd.putstr("Ambient Temp = ")        lcd.move_to(8,2)        lcd.putstr("%.2f" % temperature + "*")        time.sleep(3)        lcd.clear()        lcd.move_to(0,4)        lcd.putstr("Checking soil ")        lcd.move_to(0,1)        lcd.putstr("moisture... ")        time.sleep(2)        #print("Checking soil moisture sensor...")        soil_moisture = (max_moisture-soil_moisture_pin.read_u16())*100/ (max_moisture-min_moisture)#= check_soil_moisture()        lcd.clear()        lcd.move_to(0,4)        lcd.putstr("Soil Moisture:" + "%.2f" % soil_moisture + "%" )        lcd.move_to(0,1)        lcd.putstr("(adc: "+str(soil_moisture_pin.read_u16())+")")        time.sleep(5)        #print("soil_moisture: " + "%.2f" % soil_moisture +"% (adc: "+str(soil_moisture_pin.read_u16())+")")        if soil_moisture < 80:  # Soil is dry            lcd.clear()            lcd.move_to(0,4)            lcd.putstr("Soil is dry!")            lcd.move_to(0,1)            lcd.putstr("Plants are thirsty!")            lcd.move_to(0,2)            lcd.putstr("Activating Pump")            time.sleep(2)            lcd.clear()            control_relay(False)  # Turn on relay            blue_led.value(1)  # Blue LED on            for count in range(5, 0, -1):                lcd.move_to(0,4)                lcd.putstr("Activating Pump")                lcd.move_to(0,3)                lcd.putstr("Watering for: %d" % count)                lcd.move_to(15,3);                if (count < 10):                    lcd.move_to(15,3)                    lcd.putstr(' ');  # alternatively: '0'                time.sleep(1)            #print("Soil is dry. Plants are thirsty! Activating Saviour Pump for 30 seconds...")            blue_led.value(0)# Blue LED off            control_relay(True) # Turn off relay            lcd.clear()            lcd.move_to(0,4)            lcd.putstr("Pumping Complete")            lcd.move_to(0,1)            lcd.putstr("Happy Seedlings!")            lcd.move_to(0,2)            lcd.putstr("See you in 4!")            time.sleep(2)            #print("Pump has done it's business. The seedling's thank you! See you in 8 hours...")            # Countdown timer            lcd.clear()            for seconds_remaining in range(total_seconds, 0, -1):                hours = seconds_remaining // 3600                minutes = (seconds_remaining % 3600) // 60                seconds = seconds_remaining % 60                                lcd.putstr("See you in:\n")                lcd.move_to(12,3)                lcd.putstr("%02d\n" % hours,)                lcd.move_to(14,3)                lcd.putstr(":%02d\n" % minutes)                lcd.move_to(17,3)                lcd.putstr(":%02d" % seconds)                time.sleep(1)            time.sleep(4 * 60 * 60)        else:            lcd.clear()            lcd.move_to(0,4)            lcd.putstr("Soil is Moist.")            lcd.move_to(0,1)            lcd.putstr("Happy Seedlings!")            lcd.move_to(0,2)            lcd.putstr("See you in 4!")            time.sleep(2)            for seconds_remaining in range(total_seconds, 0, -1):                hours = seconds_remaining // 3600                minutes = (seconds_remaining % 3600) // 60                seconds = seconds_remaining % 60                lcd.move_to(0,3)                lcd.putstr("See you in:\n")                lcd.move_to(12,3)                lcd.putstr("%02d\n" % hours,)                lcd.move_to(14,3)                lcd.putstr(":%02d\n" % minutes)                lcd.move_to(17,3)                lcd.putstr(":%02d" % seconds)                time.sleep(1)            #print("Soil is moist. Plant's are happy, see you in 8 hours...")            blink_rgb(green_led,10)            time.sleep(4 * 60 * 60)    else:  # No water in tank        lcd.clear()        lcd.move_to(0,4)        lcd.putstr("Tank Empty")        lcd.move_to(0,1)        lcd.putstr("The end is neigh!!!")        lcd.move_to(0,2)        lcd.putstr("Alert and wait 4hrs")        #print("No water in the tank. We're all going to die!!!! Triggering LED and waiting 8 hours...")        control_led(True)  # Turn on LED        blink_rgb(red_led, 5)  # Flash red LED twice        time.sleep(2)        for seconds_remaining in range(total_seconds, 0, -1):                hours = seconds_remaining // 3600                minutes = (seconds_remaining % 3600) // 60                seconds = seconds_remaining % 60                lcd.move_to(0,3)                lcd.putstr("See you in:\n")                lcd.move_to(12,3)                lcd.putstr("%02d\n" % hours,)                lcd.move_to(14,3)                lcd.putstr(":%02d\n" % minutes)                lcd.move_to(17,3)                lcd.putstr(":%02d" % seconds)                time.sleep(1)        control_led(False)  # Turn off LED        time.sleep(4 * 60 * 60)        ########################################################################################Setup the Interrupt Request Handling for Pb_Switch change of statePb_Switch.irq(trigger=machine.Pin.IRQ_RISING, handler=Pb_Switch_INT)Pb_Switch.irq(trigger=machine.Pin.IRQ_FALLING, handler=Pb_Switch_INT)Pb_Switch.irq(trigger=machine.Pin.IRQ_RISING | machine.Pin.IRQ_FALLING, handler=Pb_Switch_INT)