n307 Hamburg DE Germany

Great and very useful!
Can you do also make a tutorial for the modul HC-SR04 including all phyton scripts?That would be really great.

Hi all,

i’ve tried to update to 2.4.1.
But if Fails with some comments.
Who can help a newbie?

Pls have a look at the log and how to i fix the warnings?
Thanks

Logfile:
–> https://1drv.ms/u/s!ApE0YZ4Ndle9kAa62cB46jrluJDk

Yes, you’re right. My “old” station disappears. I’ll take a new one and it works.

Thanks

Where do you change/renew your station?
Can you provide the link?
Thanks

@trividar
Click on “Learn more” and ask for a price :-(

See here:
https://www.wunderground.com/weather/api/
They wrote:
“To improve our services and enhance our relationship with our users, we will no longer provide free weather API keys as part of our program.”

@idoodler Thanks for your Reply.
There is no clicking noise … as i haven’t got any sound device connected.
But you’re right … the 100 seems to be the problem.
I didn’t “saw” it … damn.
I’ll correct this and test it again.

Thanks

Hi,

i’ve got some problems with my script (don’t know, where i found it).
In principle, it works, but after 1 or 2 days, the monitor switches no longer on or off.
This means that the script is in an undefined state.
With the logging I wanted to see where it hangs, but that does not really work either.
Who can help me and optimize the script?

Thank you

#Bibliotheken einbinden / Import libs
from subprocess import call
import RPi.GPIO as GPIO
import time
import logging

#Einstellungen für das Logging / settings for log options
logging.basicConfig(level=logging.INFO,
                    format='%(message)s',
                    datefmt='%m-%d %H:%M',
                    filename='PIR.log',
                    filemode='w')

# define a Handler which writes INFO messages or higher to the sys.stderr
console = logging.StreamHandler()
console.setLevel(logging.INFO)

# set a format which is simpler for console use
formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')

# tell the handler to use this format
console.setFormatter(formatter)

# add the handler to the root logger
logging.getLogger('').addHandler(console)

#GPIO Modus (BOARD / BCM)
GPIO.setmode(GPIO.BCM)
 
#GPIO Pins zuweisen / set GPIO pins
GPIO_TRIGGER = 23
GPIO_ECHO = 24
Monitor_State = 0
Counter = 0
TVSERVICE = '/opt/vc/bin/tvservice'

#Richtung der GPIO-Pins festlegen (IN / OUT) / direction for Pins (in/out)
GPIO.setup(GPIO_TRIGGER, GPIO.OUT)
GPIO.setup(GPIO_ECHO, GPIO.IN)

Text = (time.strftime("%d.%m.%Y %H:%M:%S")) + (" Messung vom User gestartet")
logging.info('Gestartet')
logging.info(Text)
logging.info('ENDE')

# Bildschirm erst einmal ausschalten :-) / switch off monitor first :-)
call([TVSERVICE, '-o'])
 
def distanz():
    # setze Trigger auf HIGH / set trigger to HIGH
    GPIO.output(GPIO_TRIGGER, True)
 
    # setze Trigger nach 0.01ms aus LOW / set trigger after 0.01ms low
    time.sleep(0.00001)
    GPIO.output(GPIO_TRIGGER, False)
 
    StartZeit = time.time()
    StopZeit = time.time()
 
    # speichere Startzeit / remember starttime
    while GPIO.input(GPIO_ECHO) == 0:
        StartZeit = time.time()
 
    # speichere Ankunftszeit / remember 2'nd time
    while GPIO.input(GPIO_ECHO) == 1:
        StopZeit = time.time()
 
    # Zeit Differenz zwischen Start und Ankunft / calc difference
    TimeElapsed = StopZeit - StartZeit
    # mit der Schallgeschwindigkeit (34300 cm/s) multiplizieren
    # und durch 2 teilen, da hin und zurueck
    distanz = (TimeElapsed * 34300) / 2
 
    return distanz
 
if __name__ == '__main__':
    try:
        while True:
            abstand = distanz()

            if abstand < 120 and Monitor_State == 0:
              logging.info('Monitor gestartet')
              Monitor_State=1
              Counter = 0
              call([TVSERVICE, '-p'])
              
            elif abstand < 120 and Monitor_State == 1:
              Ausgabe = " Counter reset " + (" - %.1f cm" % abstand)
              logging.info(Ausgabe)
              Counter = 0
              
            elif abstand >= 120 and Monitor_State == 1 and Counter = 100 and Counter >= 11:
              Monitor_State=0
              Counter = 0
              call([TVSERVICE, '-o'])
            
            time.sleep(1)
 
        # Beim Abbruch durch STRG+C resetten / reset after STRG+C
    except KeyboardInterrupt:
        GPIO.cleanup()