Preventing useless multiple disk writes

[gontajones]

What if you check the GPIO pin state at the beginning of your pumpcontrol() function?

def pumpcontrol(threshold,boord):
    if (boord == 'sb'):
        mcpch = 0
        gpio = 23
        displ = I2C_LCD_driver_twoLCD.lcd(0x26)
    elif (boord == 'bb'):
        mcpch = 1
        gpio = 24
        displ = I2C_LCD_driver_twoLCD.lcd(0x27)
    else:
        pumpstat = False
        return 'No valid boord'

    # Like this
    GPIO.setup(gpio, GPIO.IN)
    if (GPIO.input(gpio)):
        prevpumpstat = 'ON'
    else:
        prevpumpstat = 'OFF'
    GPIO.setup(gpio, GPIO.OUT)