Thermostatv2.5

import time
import logging
import datetime
import board
import adafruit_dht
import gpiozero as gpio
from importlib import reload
from tkinter import *

# Function to make time stamps for logging.
def timestamp():
    return datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S:')

# Set logging Level: logging.INFO, logging.WARNING, logging.ERROR, logging.DEBUG
logging.basicConfig(filename='thermostat.log',level=logging.INFO)


logging.info(timestamp() + "Initializing sensor and relays...")


# Initialize the dht device, with data pin connected to:
dhtDevice = adafruit_dht.DHT22(board.D17)

# Set GPIO pins for relays, set to OPEN state (0), use LED function to toggle on and off
relay1 = gpio.LED(18, initial_value=0)
relay2 = gpio.LED(23, initial_value=0)
logging.info(timestamp() + "waiting 5 seconds to save relay wear...")
time.sleep(5.0)

# Cause i don't know how else to trigger it... :)
while True:
    # Would love to make a function; except when i do it complains about "temperature_f is not defined" even when i set it as a global variable... the error comes from the guiTemp and guiTempText within the tkinter GUI code.
    try:
        # Get data from dht sensor
        temperature = dhtDevice.temperature
        temperature_f = round(temperature * (9 / 5) + 32)

    except RuntimeError as error:
        # Errors happen fairly often, DHT's are hard to read, just log and keep going
        logging.error(timestamp() + error.args[0])

# Set default values to avoid NPE errors.
    currentMode = "NULL"
    setTemp = 68

# Thermostat function
    def thermostat():
        global currentMode
        global temperature
        global temperature_f
        guiTemp.config(text=temperature_f)
        logging.info(timestamp() + currentMode)
        logging.info(timestamp() + "Set temp set to: " + str(setTemp))

# Heating logic
        if currentMode == "Heat":
            if relay2.value == 1:
                relay2.off()
                logging.debug(timestamp() + "Relay2 (cool) enabled; disabling")
            if temperature_f < setTemp:
                logging.debug(timestamp() + "Temp: {:.1f}".format(temperature_f))
                logging.info(timestamp() + "Temperature less than desired temp: Heating")
                if relay1.value == 0:
                    relay1.on()

            else:
                logging.debug(timestamp() + "Temp: {:.1f}".format(temperature_f))
                logging.info(timestamp() + "Not running")
                if relay1.value == 1:
                    relay1.off()
                    logging.debug(timestamp() + "disabling relay1 (heat)")

# Cooling logic
        if currentMode == "Cool":
            if relay1.value == 1:
                relay1.off()
                logging.debug(timestamp() + "Relay1 (heat) enabled; disabling")
            if temperature_f > setTemp:
                logging.debug(timestamp() + "Temp: {:.1f}".format(temperature_f))
                loggin.info(timestamp() + "Temperature greater than desired temp: Cooling")
                if relay2.value == 0:
                    relay2.on()
            else:
                logging.debug(timestamp() + "Temp: {:.1f}".format(temperature_f))
                logging.info(timestamp() + "Not running")
                if relay2.value == 1:
                    relay2.off()
                    logging.debug(timestamp() + "disabling relay2 (cool)")

# Repeat of above try function to get GUI to update; cause i'm lazy.
        try:
            # Print the values to the serial port
            temperature = dhtDevice.temperature
            temperature_f = round(temperature * (9 / 5) + 32)

        except RuntimeError as error:
            # Errors happen fairly often, DHT's are hard to read, just keep going
            logging.error(timestamp() + error.args[0])
        main.after(3000,thermostat) # Runs the loop every 3 seconds within the function.

    main = Tk() # Main tkinter function.
    main.title("Thermostat")
    main.geometry("800x600") # Sets window resolution
    main.configure(bg="black", cursor="none") # Sets background color of the window to black and disables the Mouse Cursor.
    main.overrideredirect(True) # Makes fullscreen

    guiTempText = Label(main, text="Current Temperature: ", font=(None, 25), fg="white", bg="black")
    guiTemp = Label(main, text=temperature_f, font=(None, 30), fg="white", bg="black")
    guiTemp.config(text=temperature_f)
    guiTempText.place(relx = 0.5, rely= 0.10, anchor = CENTER)
    guiTemp.place(relx = 0.5, rely= 0.20, anchor = CENTER)
    setTempLabel = Label(main, font=(None, 20), text=setTemp, fg="white", bg="black")
    setTempLabel.place(relx = 0.5, rely= 0.40, anchor = CENTER)

# Create setTemp adjustment buttons and place them in the GUI
    def tempPlusButtonClick():
        global setTemp
        setTemp = setTemp + 1
        setTempLabel.config(text=setTemp)
        print(setTemp)
        return

    def tempMinusButtonClick():
        global setTemp
        setTemp = setTemp - 1
        setTempLabel.config(text=setTemp)
        logging.debug(timestamp() + setTemp)
        return

    plusButton = Button(main, text="+", fg="white", bg="black", padx=20, pady=20, command=tempPlusButtonClick)
    plusButton.place(relx = 0.4, rely= 0.40, anchor = CENTER)
    minusButton = Button(main, text="-", fg="white", bg="black", padx=20, pady=20, command=tempMinusButtonClick)
    minusButton.place(relx = 0.6, rely= 0.40, anchor = CENTER)

# Create currentMode set buttons and places them in the GUI
    def heatButtonClick():
        global currentMode
        currentMode = "Heat"
        currentModeLabel.config(text="Current Mode: " + currentMode)
        logging.info(timestamp() + "Mode set to Heat")
        return

    def coolButtonClick():
        global currentMode
        currentMode = "Cool"
        currentModeLabel.config(text="Current Mode: " + currentMode)
        logging.info(timestamp() + "Mode set to Cool")
        return

    currentModeLabel = Label(main, text="Current Mode: " + currentMode, font=(None, 20), fg="white", bg="black")
    currentModeLabel.place(relx = 0.5, rely= 0.55, anchor = CENTER)

    heatButton = Button(main, text="Heat", padx=30, pady=30, bg="red", command=heatButtonClick)
    heatButton.place(relx = 0.4, rely= 0.70, anchor = CENTER)
    coolButton = Button(main, text="Cool", padx=30, pady=30, bg="blue", command=coolButtonClick)
    coolButton.place(relx = 0.6, rely= 0.70, anchor = CENTER)

# Run a loop every 3 seconds after the thermostat function to update the GUI
    main.after(3000,thermostat)
# Has to be here otherwise the program doesn't run.
    main.mainloop()