Raspberry Pi, Python und Bewässerung von Zimmerpflanzen

Komponenten und nützliche Ressourcen

• Raspberry Pi 3 Starter Kit
• Wasserpumpe, 12V
• Stromversorgung, 12V
• Relais, 5V
• Kabel anschließen
• Kabel mit Krokodilanschlüssen
• Silikonschläuche

• Wie Strom funktioniert
• Verwendung eines Relais
• Raspberry Pi Relais Netzteil
• Anschließen einer 12-V-Stromversorgung an ein Relais

Schließen Sie ein Relais an den Raspberry Pi an

Anschließen der Stromversorgung an das Relais

Anschließen einer Wasserpumpe an ein Relais

Der Code

from gpiozero import OutputDevice

class Relay(OutputDevice):
    def __init__(self, pin, active_high):
        super(Relay, self).__init__(pin, active_high)

import datetime

class TimeKeeper:
    def __init__(self, current_time):
        self.current_time = current_time
        self.time_last_watered = None
    
    def set_current_time(self, updated_time):
        self.current_time = updated_time

    def set_time_last_watered(self, updated_time):
        self.time_last_watered = updated_time

    @staticmethod
    def get_current_time():
        now = datetime.datetime.now()
        return now.strftime("%I:%M:%S %p")

from classes import Hardware
from classes import TimeKeeper as TK
import schedule
import smtplib
import time
import ssl

# WATERING_TIME must be in "00:00:00 PM" format
WATERING_TIME = '11:59:50 AM'
SECONDS_TO_WATER = 10
RELAY = Hardware.Relay(12, False)
EMAIL_MESSAGES = {
    'last_watered': {
        'subject': 'Raspberry Pi: Plant Watering Time',
        'message': 'Your plant was last watered at'
    },
    'check_water_level': {
        'subject': 'Raspberry Pi: Check Water Level',
        'message': 'Check your water level!',
    }
}

def send_email(time_last_watered, subject, message):
    port = 465
    smtp_server = "smtp.gmail.com"
    FROM = TO = "YOUR_EMAIL@gmail.com"
    password = "YOUR_PASSWORD"

    complete_message = ''
    if time_last_watered == False:
        complete_message = "Subject: {}\n\n{}".format(subject, message)
    else:
        complete_message = "Subject: {}\n\n{} {}".format(subject, message, time_last_watered)
    
    context = ssl.create_default_context()
    with smtplib.SMTP_SSL(smtp_server, port, context=context) as server:
        server.login(FROM, password)
        server.sendmail(FROM, TO, complete_message)

def send_last_watered_email(time_last_watered):
    message = EMAIL_MESSAGES['last_watered']['message']
    subject = EMAIL_MESSAGES['last_watered']['subject']
    send_email(time_last_watered, subject, message)

def send_check_water_level_email():
    message = EMAIL_MESSAGES['check_water_level']['message']
    subject = EMAIL_MESSAGES['check_water_level']['subject']
    send_email(False, subject, message)

def water_plant(relay, seconds):
    relay.on()
    print("Plant is being watered!")
    time.sleep(seconds)
    print("Watering is finished!")
    relay.off()

def main():
    time_keeper = TK.TimeKeeper(TK.TimeKeeper.get_current_time())
    if(time_keeper.current_time == WATERING_TIME):
        water_plant(RELAY, SECONDS_TO_WATER)
        time_keeper.set_time_last_watered(TK.TimeKeeper.get_current_time())
        print("\nPlant was last watered at {}".format(time_keeper.time_last_watered))
        # send_last_watered_email(time_keeper.time_last_watered)

# schedule.every().friday.at("12:00").do(send_check_water_level_email)

while True:
    # schedule.run_pending()
    time.sleep(1)
    main()

1. Sie müssen in die Zeile FROM = TO = «YOUR_EMAIL@gmail.com»und password = «YOUR_PASSWORD»Ihre Google Mail-E-Mail-Adresse und Ihr Passwort eingeben.
2. Kommentieren Sie die folgenden Zeilen aus:
   
   
   •  # send_last_watered_email (time_keeper.time_last_watered)
   • # Schedule.every (). friday.at ("12:00"). do (send_check_water_level_email)
   • # sched.run_pending ()
3. Sie müssen hierher gehen , sich bei Ihrem Google Mail-Konto anmelden und den Schalter auf dieser Seite aktivieren. Andernfalls wird beim Versuch, eine E-Mail mit Google Mail zu senden, eine Fehlermeldung angezeigt. 

run
├── classes
│ ├── Hardware.py
│ └── TimeKeeper.py
└── water_plant.py

sudo crontab -e

@reboot python3 /home/pi/Desktop/run/water_plant.py

Zusammenfassung

git clone https://github.com/AlanConstantino/rpi-plant-project.git