# Project#3 - DateTime Automation
# Information - In this pr0ject, we're going to use the Dattime module to automate the relay
# The relay can be used to control a combination lock.  In the project video, I'll show you how.
# Datetime is a fantastic took for automation, and can be used for SO MANY THINGS.
import time    # The 'time' module is included with pycharm and allows for us to create delays.
import serial  # The 'serial' or 'pyserial' module needs to be imported.  See the project video for more info.
import datetime # We're going to use this module to read the current time and compare it to a set time.

# Note that serial/pyserial is the module that allows for us to communicate with external microcontrollers.
# Remember that you need to program your RPInoRPI with the code for project#3.

# The first thing that we need to do is to talk to our RPInoRPI.
try:  # Try to establish communication with the RPInoRPI board.  if successful, only the 'try:' will be executed
    MCU = serial.Serial(port='COM10', baudrate=115200, timeout=0.01)  # See project video for more info on this line.
    time.sleep(1)  # Wait one second
except:  # If communication with the RPInoRPI could not be established, then perform the following instead:
    print('System Locked - Cannot communicate with MCU.  Close this program, then reconnect to MCU and restart program')
    while True:  # Forever loop.  Close the program and start again.  Check connection to the RPInoRPI
        pass  # Do nothing

def write_read(x):  # This function acts to send data (x) to the RPInoRPI.  Nothing more.
    MCU.write(bytes(x, 'utf-8'))  # Write the value stored in 'x' to the RPInoRPI
    time.sleep(0.2)  # Wait 0.2 seconds/200ms


# Main Code
x = '5'      # Set x to a fixed value of 5.
Relay_ON_Time = '08:28:00'  # This the time that the relay will turn on.  Set it 5 minutes ahead to test it out!
# Time : 9AM 18MIN 30MIN, or 9:30AM.
# You can add a second or third fixed time here.  See comments at the end of the code
#Relay_ON_Time2 =       See comments at the end of this program
#Relay_ON_Time3 =       See comments at the end of this program
while True:  # Run the following code until you close the program (loop forever)
    Current_Time = datetime.datetime.now()  # Grab a date stamp and place the result in fail_time
    Current_Time = Current_Time.strftime("%H:%M:%S")  # This is here to play with
    time.sleep(1)  # Wait for 2 seconds then start over
    print("Current_Time: " + str(Current_Time)) # Concatenate and print string
    if Current_Time == Relay_ON_Time:           # If the current time equals our ON time, then execute the following:
        print("Turn the relay on!")             # Print this to the screen
        write_read(x)    # Send over the RELAY ON command (5 Decimal / 53 ASCII)
        time.sleep(2)    # Wait for 2 seconds 

# How you use this project is up to you.  I have just created a way to automate a relay for a few seconds once a day
# In the line: 'if Current_Time == Relay_ON_Time:'  - IF you have more than one relay activation time, you can do this:
# if Current_Time == Relay_ON_Time or Current_Time == Relay2_ON_Time2 or Current_Time == Relay_ON_Time3:
# You don't have to limit yourself to one time to automate the relay.  You also don't need to use the relay...
# You can automate whatever you'd like on the RPInoPRI using this method.
# Here is a great tutorial on datetime: https://www.programiz.com/python-programming/datetime