智能灌溉 反馈 代理

import RPi.GPIO as GPIO, time, json
MOISTURE_PIN = 17
VALVE_PIN = 27
GPIO.setmode(GPIO.BCM)
GPIO.setup(MOISTURE_PIN, GPIO.IN)
GPIO.setup(VALVE_PIN, GPIO.OUT, initial=False)
LOW = 30; HIGH = 70

while True:
    moisture = GPIO.input(MOISTURE_PIN)
    pct = moisture * 100
    if pct < LOW: GPIO.output(VALVE_PIN, True)
    elif pct >= HIGH: GPIO.output(VALVE_PIN, False)
    print(json.dumps({"moisture":pct,"valve":GPIO.input(VALVE_PIN)}))
    time.sleep(5)