strawberry-pi-greenhouse/main.py

import time
import os
from datetime import datetime
try:
    import paho.mqtt.client as mqtt
    import gpiozero
    global GPIO
    import RPi.GPIO as GPIO
except ImportError:
    print('Some modules are missing. Try to install them with "pip3 install -r requirements.txt"')
    exit()
GPIO.setmode(GPIO.BCM)

# setting up ultrasonic pins
GPIO_TRIGGER = 18
GPIO_ECHO = 24
GPIO.setup(GPIO_TRIGGER, GPIO.OUT)
GPIO.setup(GPIO_ECHO, GPIO.IN)


def debug_print(message: str):
    now = datetime.now()
    current_time = now.strftime("%H:%M:%S")
    print('[DEBUG]['+current_time+'] '+message)

def error_print(message: str):
    now = datetime.now()
    current_time = now.strftime("%H:%M:%S")
    print('[ERROR]['+current_time+'] '+message)

def relay_controller(pin: int, status: str):
    if status == "ON":
        relay = gpiozero.OutputDevice(pin, active_high=False, initial_value=False)
        relay.on()
    elif status == "OFF":
        relay = gpiozero.OutputDevice(pin, active_high=False, initial_value=False)
        relay.off()
    else:
        error_print("Unknown status for relay ("+status+")")

def get_water_level():
    GPIO.output(GPIO_TRIGGER, True)
    time.sleep(0.00001)
    GPIO.output(GPIO_TRIGGER, False)
 
    startTime = time.time()
    StopTime = time.time()
 
    while GPIO.input(GPIO_ECHO) == 0:
        startTime = time.time()
    while GPIO.input(GPIO_ECHO) == 1:
        StopTime = time.time()
 
    TimeElapsed = StopTime - startTime
    distance = (TimeElapsed * 34300) / 2
 
    return distance