#!/usr/bin/python3.4 # -*- coding: utf-8 -*- import RPi.GPIO as GPIO import datetime import time import os from datetime import timedelta #Setup GPIO.setwarnings(False) servoPIN = 21 GPIO.setmode(GPIO.BCM) GPIO.setup(servoPIN, GPIO.OUT) p = GPIO.PWM(servoPIN,50) #setting the PWM to use normal RC-Servo led_red=22 #LED to show heater is on led_orange=27 #LED to show presence-status taster=17 #button to cancel errors and to get an extra-time boost, if one is longer awake for example GPIO.setup(led_red,GPIO.OUT) GPIO.setup(led_orange,GPIO.OUT) GPIO.setup(taster,GPIO.IN) #position of the servo p_off=5.5 p_on=9 p_mitte=7.5 #mitte means middleposition servo_pause=.4 #pause of 0,4 seconds between movements #some variables persons = False #presenceflag timesgood = False #time is good to heat heater = 0 alert = 2 #if something bad has happened this will turn to 1 otherwise 0 release= True #servo will be triggered to make heater either on or off heater_old= 2 #variable of old cycle counter=0 #counts the cycles control_cycle=180 #every x control cycle the actual heater varlue will be put to the servos excepter=False #if there is an exception in form of button is triggered time_off=datetime.datetime.now() #actual time onTimes = [datetime.time(6, 45, 0), datetime.time(9, 0, 0), datetime.time(9, 0, 0)] #several on-times can be put offTimes= [datetime.time(7,40, 0), datetime.time(22, 50, 0), datetime.time(23, 50, 0)] #off-times means after that moment no presence can trigger the heater to on ll = len(onTimes) #length of vector def ledredon(channel): #will be triggered if button is pressed. if GPIO.input(taster)==False: GPIO.output(led_red,GPIO.HIGH) global excepter excepter=True global time_off time_off=datetime.datetime.now()+datetime.timedelta(minutes=45) #now heater will be on for 45 minutes even if no device is connected or time is bad. def servop(x): #pushes the button. in my case it has to always push the other button first to trigger safely the heater to on or off. thats way it makes to movements for on or off. p.start(p_mitte) p.ChangeDutyCycle(p_mitte) time.sleep(servo_pause) if x==0: #p.ChangeDutyCycle(p_off) #time.sleep(servo_pause) p.ChangeDutyCycle(p_on) time.sleep(servo_pause) p.ChangeDutyCycle(p_off) time.sleep(servo_pause) if x==1: #p.ChangeDutyCycle(p_on) #time.sleep(servo_pause) p.ChangeDutyCycle(p_off) time.sleep(servo_pause) p.ChangeDutyCycle(p_on) time.sleep(servo_pause) p.ChangeDutyCycle(p_mitte) #middleposition time.sleep(servo_pause) p.ChangeDutyCycle(0) #has to be put so that servo doesnt twitch GPIO.add_event_detect(taster, GPIO.FALLING, callback=ledredon) #starts the above event #program while True: lastdatelog_raw=os.path.getmtime('/home/pi/opt/anwesenheit1') #writes timestamp of the presence-textfile lastdatelog=datetime.datetime.fromtimestamp(lastdatelog_raw) #writes only the time without the date current_datetime = datetime.datetime.now() #current time and date current_time = datetime.datetime.now().time() #current time f_text = open('/home/pi/opt/anwesenheit1', 'r') #read the presence-textfile s_text = f_text.read() if ("p: present" in s_text) or ("m: present" in s_text) or ("rudi: present" in s_text) or ("phipp: present" in s_text) or ("flo: present" in s_text): persons=True #if minimum one of the residents above is there GPIO.output(led_orange,GPIO.HIGH) #orange led will be turned on #print "someones there" else: GPIO.output(led_orange,GPIO.LOW) #orange led is off when nobodys at home if "WARNING: could not connect to http://fritz.box" in s_text: #if no connection could be made this string will be found alert=1 #somethin bad happened so alert to 1 persons=False GPIO.output(led_orange,GPIO.LOW) #print "error connection" f_text.close #close textfile so that it can be updated #no there are some actions to use different ontimes for different days. workdays the heater goes out earlier. (weekday counts from 0 to 6!) if (datetime.datetime.today().weekday()<5): #till friday if (current_time >= onTimes[0]) and (current_time <= offTimes[0]): timesgood = True if (datetime.datetime.today().weekday()<4): #till thursday if (current_time >= onTimes[1]) and (current_time <= offTimes[1]): timesgood = True if (datetime.datetime.today().weekday() == 4) or (datetime.datetime.today().weekday() == 5): #freitag und samstag if (current_time >= onTimes[2]) and (current_time <= offTimes[2]): timesgood = True if (datetime.datetime.today().weekday() == 6): #sunday if (current_time >= onTimes[1]) and (current_time <= offTimes[1]): timesgood = True #if someones there and the time is good, then heater can be put on if (persons==True) and (timesgood == True): heater=1 GPIO.output(led_red,GPIO.HIGH) #red led on to show that heater should be on too. elif excepter==True: #if button was pressed heater will be turned on also heater=1 excepter=False elif time_off>datetime.datetime.now(): #this belong also to the button. if button was pressed not long ago (in my case 45 min) then heater is on. Had to put this too, so that controlcycle doesnt disturb this thing. heater=1 else: #if nothing is saying heater on, well it goes off. heater=0 GPIO.output(led_red,GPIO.LOW) if (lastdatelog < current_datetime-datetime.timedelta(minutes=3)) and alert==0: #if the presence-textfile is too old there is an alert. alert=1 #print "datei zu alt" if alert==1: #if there is an alert, the heater goes out. heater=0 if heater_old==heater: #if no new status was given to heater, then nothing happens, no servo will be moved assuming the heater stays also on. release=False counter=counter+1 else: #if the heaterstatus has indeed changed then the servo should be released. release=True counter=0 if counter>control_cycle: #after some control_cycles the servos will also be moved just to make sure. release=1 counter=0 if (heater==1) and (release==True): #now its time to move the servo if everything is good for that. servop(1) release=False elif (heater==0) and (release==True): #also moving the servo but to make the heater out. servop(0) release=False #print "heizung aus" if alert==1: #if tthere is an error or alert then the redled will blink and one has to push the button to cancel, then the loop continues or falls again in this alert mode. then you have to check and search for the error while GPIO.input(taster)==True: GPIO.output(led_red,GPIO.LOW) time.sleep(0.1) GPIO.output(led_red,GPIO.HIGH) time.sleep(0.1) alert=0 time.sleep(1) excepter=False time_off=datetime.datetime.now() counter=0 heater_old=heater persons=False timesgood=False time.sleep(30) #loop is triggered every 30 seconds. while control_cycle is set to 180 this means a check every 90 minutes. p.stop()