Das deutsche Python-Forum

Code: Alles auswählen

#! /usr/bin/python

import os
import glob
import RPi.GPIO as GPIO
import time
from time import *

GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
GPIO.setmode(GPIO.BCM)  # BCM GPIO Nummern
GPIO.setup(24,GPIO.OUT) # P4 Ausgang fuer LED

os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

base_dir = '/sys/bus/w1/devices/' 
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

def read_temp_raw():
	f = open(device_file, 'r') 
	lines = f.readlines() 
	f.close()
	return lines
	
def read_temp():
	lines = read_temp_raw()
	while lines[0].strip()[-3:] != 'YES':
		time.sleep(0.2)
		lines = read_temp_raw()
	equals_pos = lines[1].find('t=') 
	if equals_pos != -1:
		temp_string = lines[1][equals_pos+2:] 
		temp_c = float(temp_string) / 1000.0
		temp_c = '%.2f' % temp_c # Anzahl Nachkommastellen = 2
		zeit = localtime()
		return str(temp_c)
intervall = int(raw_input("Messintervall in Sekunden? "))
datenlog = raw_input("Daten loggen? (j/n)")

if datenlog == "j":
	while True:
		print(strftime("%d.%m.%Y", zeit) + " | " + strftime("%H:%M:%S", zeit) + " | " + read_temp()) +"C"
		GPIO.output(24,True) #LED leuchtet fuer 1 sek wenn daten geschrieben werden
		sleep(1)
		GPIO.output(24,False)
		sleep(intervall-1)
		fobj_out = open("temp-daten.csv","a")
		fobj_out.write(strftime("%d.%m.%Y", zeit) + ";" + strftime("%H:%M:%S", zeit) + ";" + read_temp() + "\n")
		fobj_out.close()

if datenlog == "n":
	while True:
		print(strftime("%d.%m.%Y", zeit) + " | " + strftime("%H:%M:%S", zeit) + " | " + read_temp()) +"C"
		sleep(intervall)

Code: Alles auswählen

#! /usr/bin/python

import os
import glob
import RPi.GPIO as GPIO
import time
from time import *

GPIO.cleanup()
GPIO.setmode(GPIO.BOARD)
GPIO.setmode(GPIO.BCM)  # BCM GPIO Nummern
GPIO.setup(24,GPIO.OUT) # P4 Ausgang fuer LED

os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')

base_dir = '/sys/bus/w1/devices/' 
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

def read_temp_raw():
	f = open(device_file, 'r') 
	lines = f.readlines() 
	f.close()
	return lines
	
def read_temp():
	lines = read_temp_raw()
	while lines[0].strip()[-3:] != 'YES':
		time.sleep(0.2)
		lines = read_temp_raw()
	equals_pos = lines[1].find('t=') 
	if equals_pos != -1:
		temp_string = lines[1][equals_pos+2:] 
		temp_c = float(temp_string) / 1000.0
		temp_c = '%.2f' % temp_c # Anzahl Nachkommastellen = 2
		global zeit
		return str(temp_c)
intervall = int(raw_input("Messintervall in Sekunden? "))
datenlog = raw_input("Daten loggen? (j/n)")

if datenlog == "j":
	while True:
		zeit = localtime()
		print(strftime("%d.%m.%Y", zeit) + " | " + strftime("%H:%M:%S", zeit) + " | " + read_temp()) +"C"
		GPIO.output(24,True) #LED leuchtet fuer 1 sek wenn daten geschrieben werden
		sleep(1)
		GPIO.output(24,False)
		sleep(intervall-1)
		fobj_out = open("temp-daten.csv","a")
		fobj_out.write(strftime("%d.%m.%Y", zeit) + ";" + strftime("%H:%M:%S", zeit) + ";" + read_temp() + "\n")
		fobj_out.close()

if datenlog == "n":
	while True:
		zeit = localtime()
		print(strftime("%d.%m.%Y", zeit) + " | " + strftime("%H:%M:%S", zeit) + " | " + read_temp()) +"C"
		sleep(intervall)

Code: Alles auswählen

global

Code: Alles auswählen

#!/usr/bin/env python
import os
import glob
from datetime import datetime as DateTime
from subprocess import call
from time import sleep
import RPi.GPIO as GPIO

BASE_DIR = '/sys/bus/w1/devices/'
DEVICE_FOLDER = glob.glob(os.path.join(BASE_DIR, '28*'))[0]
DEVICE_FILE = os.path.join(DEVICE_FOLDER, 'w1_slave')

LOG_FILENAME = 'temp-daten.csv'

LED_PIN = 24
LED_DURATION = 1  # In Sekunden.


def read_lines(filename):
    with open(filename) as lines:
        return list(lines)


def read_temperature():
    while True:
        lines = read_lines(DEVICE_FILE)
        if lines[0].rstrip().endswith('YES'):
            break
        sleep(0.2)
    _, _, temperature_string = lines[1].partition('t=')
    return float(temperature_string) / 1000.0


def main():
    GPIO.cleanup()
    GPIO.setmode(GPIO.BOARD)
    GPIO.setmode(GPIO.BCM)  # BCM GPIO Nummern
    GPIO.setup(LED_PIN, GPIO.OUT)  # Ausgang fuer LED

    for module_name in ['w1-gpio', 'w1-therm']:
        call(['modprobe', module_name])

    interval = int(raw_input('Messintervall in Sekunden? '))
    should_log = raw_input('Daten loggen? (j/n) ') == 'j'

    while True:
        now = DateTime.now()
        values = [
            '{0:%Y-%m-%d}'.format(now),
            '{0:%H:%M:%S}'.format(now),
            '{0:.2f}C'.format(read_temperature())
        ]
        print ' | '.join(values)
        if should_log:
            # 
            # LED leuchtet fuer LED_DURATION sek wenn daten geschrieben werden.
            # 
            GPIO.output(LED_PIN, True)
            sleep(LED_DURATION)
            GPIO.output(LED_PIN, False)

            sleep(interval - LED_DURATION)
            with open(LOG_FILENAME, 'a') as log_file:
                log_file.write(';'.join(values) + '\n')
        else:
            sleep(interval)


if __name__ == '__main__':
    main()