Add moving average

src/program.py

@@ -20,6 +20,7 @@ from colorama import Style
 from subprocess import check_call
 from signal import pause
 import smtplib, ssl
+from collections import deque
 
 picdir = os.path.realpath("/home/firestone/pi-zero-tank/pic")
 libdir = os.path.realpath("/home/firestone/pi-zero-tank/lib")
@@ -37,6 +38,7 @@ import traceback
 logging.basicConfig(level=logging.DEBUG)
 
 NUM_SAMPLES = 100
+AVG_WINDOWSIZE = 20
 FILE = Path("config.ini")
 ALARM_LEVEL_CM = 5.0
 
@@ -128,6 +130,15 @@ class Buttons:
     def none_event(self):
         pass
 
+class MovingAverage:
+    def __init__(self, size: int):
+        self.size = size
+        self.buffer = deque(maxlen=size)
+
+    def add_value(self, value: float):
+        self.buffer.append(value)
+        return sum(self.buffer) / len(self.buffer), len(self.buffer) == self.size
+
 def shutdown(epd):
     print("System wird heruntergefahren:")
     print("Erstelle Backup...")
@@ -307,35 +318,10 @@ if __name__ == '__main__':
     buttons = Buttons(button_cl, button_ph)
 
     print("Starte Hauptprogramm...")
+    mavg_cl = MovingAverage(AVG_WINDOWSIZE)
+    mavg_ph = MovingAverage(AVG_WINDOWSIZE)
     while True:
         try:
-            cl = measure(sensor_cl)
-            ph = measure(sensor_ph)
-            clp = get_percent(cl_leer, cl_voll, cl)
-            php = get_percent(ph_leer, ph_voll, ph)
-            display_site_main(epd, clp, php)
-            print("Chlor: {:10.2f} cm, pH-Minus: {:10.2f} cm".format(cl, ph))
-            print("Chlor: {:10.2f} %,  pH-Minus: {:10.2f} %".format(clp, php))
-            if abs(cl_leer - ALARM_LEVEL_CM) < cl:
-                print(f"{Fore.RED}Chlor-Tank fast leer!{Style.RESET_ALL}")
-                if cl_mail == 0:
-                    print("Sende E-Mail...")
-                    send_email("Chlor", abs(cl_leer - cl))
-                    cl_mail = 1
-                    config.set('Chlor', 'mail', str(cl_mail))
-                    config.set('Chlor', 'datum_mail', str(datetime.datetime.now()))
-                    with open(FILE, 'w') as configfile:
-                        config.write(configfile)
-            if abs(ph_leer - ALARM_LEVEL_CM) < ph:
-                print(f"{Fore.RED}pH-Minus-Tank fast leer!{Style.RESET_ALL}")
-                if ph_mail == 0:
-                    print("Sende E-Mail...")
-                    send_email("pH-Minus", abs(ph_leer - ph))
-                    ph_mail = 1
-                    config.set('pH-', 'mail', str(ph_mail))
-                    config.set('pH-', 'datum_mail', str(datetime.datetime.now()))
-                    with open(FILE, 'w') as configfile:
-                        config.write(configfile)
             state = buttons.get_state()
             if state == States.MEASURE_CL_FULL:
                 buttons.deactivate_events()
@@ -407,6 +393,34 @@ if __name__ == '__main__':
                 buttons.activate_events()
             elif state == States.SHUTDOWN:
                 shutdown(epd)
+            else:
+                cl, cl_status = mavg_cl.add_value(measure(sensor_cl))
+                ph, ph_status = mavg_cl.add_value(measure(sensor_ph))
+                clp = get_percent(cl_leer, cl_voll, cl)
+                php = get_percent(ph_leer, ph_voll, ph)
+                display_site_main(epd, clp, php)
+                print("Chlor: {:10.2f} cm, pH-Minus: {:10.2f} cm".format(cl, ph))
+                print("Chlor: {:10.2f} %,  pH-Minus: {:10.2f} %".format(clp, php))
+                if cl_status and abs(cl_leer - ALARM_LEVEL_CM) < cl:
+                    print(f"{Fore.RED}Chlor-Tank fast leer!{Style.RESET_ALL}")
+                    if cl_mail == 0:
+                        print("Sende E-Mail...")
+                        send_email("Chlor", abs(cl_leer - cl))
+                        cl_mail = 1
+                        config.set('Chlor', 'mail', str(cl_mail))
+                        config.set('Chlor', 'datum_mail', str(datetime.datetime.now()))
+                        with open(FILE, 'w') as configfile:
+                            config.write(configfile)
+                if ph_status and abs(ph_leer - ALARM_LEVEL_CM) < ph:
+                    print(f"{Fore.RED}pH-Minus-Tank fast leer!{Style.RESET_ALL}")
+                    if ph_mail == 0:
+                        print("Sende E-Mail...")
+                        send_email("pH-Minus", abs(ph_leer - ph))
+                        ph_mail = 1
+                        config.set('pH-', 'mail', str(ph_mail))
+                        config.set('pH-', 'datum_mail', str(datetime.datetime.now()))
+                        with open(FILE, 'w') as configfile:
+                            config.write(configfile)
             time.sleep(0.5)
         except KeyboardInterrupt:
             shutdown(epd)