水泵 自动化 系统

from gpiozero import Button, OutputDevice
from time import sleep, monotonic
import signal
import sys

FLOAT_GPIO = 17
PUMP_RELAY_GPIO = 27

float_sensor = Button(FLOAT_GPIO, pull_up=True, bounce_time=0.2)
pump = OutputDevice(PUMP_RELAY_GPIO, active_high=False, initial_value=False)

def is_water_low():
    return float_sensor.is_pressed

def pump_on():
    pump.on()
    print("[ACTION] Pump ON")

def pump_off():
    pump.off()
    print("[ACTION] Pump OFF")

def safe_exit(signum=None, frame=None):
    pump_off()
    sys.exit(0)

signal.signal(signal.SIGINT, safe_exit)
signal.signal(signal.SIGTERM, safe_exit)

while True:
    if is_water_low():
        pump_on()
    else:
        pump_off()

    sleep(1)