strawberry-pi-greenhouse/main.py

from datetime import datetime
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)

debug_print("Importing modules")

from string import whitespace
import time
import os
try:
    import paho.mqtt.client as mqtt
    import gpiozero
    import RPi.GPIO as GPIO
    import board
    import busio
    import adafruit_bmp280
except ImportError:
    print('Some modules are missing. Try to install them with "pip3 install -r requirements.txt"')
    print(ImportError)
    exit()

debug_print("Imported modules")

#relay
def relay_controller(pin: int, state: str):
    if state == "True":
        os.system('raspi-gpio set '+str(pin)+' op')
        debug_print("Set relay-pin "+str(pin)+" to state True")
    elif state == "False":
        os.system('raspi-gpio set '+str(pin)+' ip')
        debug_print("Set relay-pin "+str(pin)+" to state False")
    else:
        error_print("Unknown state ("+state+") for relay channel "+str(pin))

#ultrasonic
def get_water_level():
    GPIO.setmode(GPIO.BCM)
    GPIO.setwarnings(False)
    GPIO_TRIGGER = 24
    GPIO_ECHO = 25
    GPIO.setup(GPIO_TRIGGER, GPIO.OUT)
    GPIO.setup(GPIO_ECHO, GPIO.IN)
    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
    rounded_distance = int(distance)
    return str(rounded_distance)

debug_print("Added water level detector")

#temperature
def get_temperature():
    i2c = busio.I2C(board.SCL, board.SDA)
    bmp280 = adafruit_bmp280.Adafruit_BMP280_I2C(i2c, address=0x76)
    rounded_temp = int(bmp280.temperature)
    return str(rounded_temp)

debug_print("Added temperature sensor")

print(get_water_level())
debug_print("got water level")
print(get_temperature())
debug_print("got temperature")

def mqtt_on_connect(client, userdata, flags, rc):
    client.subscribe("strawberry-pi-greenhouse/relay/channel/1")
    client.subscribe("strawberry-pi-greenhouse/relay/channel/2")
    client.subscribe("strawberry-pi-greenhouse/relay/channel/3")
    client.subscribe("strawberry-pi-greenhouse/relay/channel/4")
    
def mqtt_on_message(client, userdata, msg):
    print("topic: " ,str(msg.topic))
    print("payload: " ,str(msg.payload.decode("utf-8")))
    topic = str(msg.topic)
    payload = str(msg.payload.decode("utf-8"))

    channel_1 = 19
    channel_2 = 16
    channel_3 = 26
    channel_4 = 20

    if topic == "strawberry-pi-greenhouse/relay/channel/1":
        if payload == "on":
            relay_controller(channel_1, "True")
        elif payload == "off":
            relay_controller(channel_1, "False")
    elif topic == "strawberry-pi-greenhouse/relay/channel/2":
        if payload == "on":
            relay_controller(channel_2, "True")
        elif payload == "off":
            relay_controller(channel_2, "False")
    elif topic == "strawberry-pi-greenhouse/relay/channel/3":
        if payload == "on":
            relay_controller(channel_3, "True")
        elif payload == "off":
            relay_controller(channel_3, "False")
    elif topic == "strawberry-pi-greenhouse/relay/channel/4":
        if payload == "on":
            relay_controller(channel_4, "True")
        elif payload == "off":
            relay_controller(channel_4, "False")


if __name__ == "__main__":
    mqttBroker ="homeassistant.ping-mee.local"
    client = mqtt.Client("greenhouse_client")
    client.username_pw_set("mqtt", "pmMQTT_11!")
    debug_print("Connecting to MQTT Broker "+str(mqttBroker))
    client.connect(mqttBroker)
    client.on_connect = mqtt_on_connect
    client.on_message = mqtt_on_message
    client.loop_start()

    try:
        client.loop_start()
        while True:
            client.publish("strawberry-pi-greenhouse/sensor/temperature", get_temperature())
            debug_print("Published current temperature: "+get_temperature())
            client.publish("strawberry-pi-greenhouse/sensor/water-level", get_water_level())
            debug_print("Published current water level: "+get_water_level())
            time.sleep(1)
    except KeyboardInterrupt:
        relay_channels = ["19", "16", "26", "20"]
        for channel in relay_channels:
            os.system('raspi-gpio set '+channel+' ip')
        GPIO.cleanup()