Luftfeuchtigkeitssensor: Programm ersetzt

https://github.com/adafruit/Adafruit_Python_DHT

Fremddateien/AdafruitDHT.py

@@ -0,0 +1,50 @@
+#!/usr/bin/python
+# Copyright (c) 2014 Adafruit Industries
+# Author: Tony DiCola
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+import sys
+
+import Adafruit_DHT
+
+
+# Parse command line parameters.
+sensor_args = { '11': Adafruit_DHT.DHT11,
+				'22': Adafruit_DHT.DHT22,
+				'2302': Adafruit_DHT.AM2302 }
+if len(sys.argv) == 3 and sys.argv[1] in sensor_args:
+	sensor = sensor_args[sys.argv[1]]
+	pin = sys.argv[2]
+else:
+	print 'usage: sudo ./Adafruit_DHT.py [11|22|2302] GPIOpin#'
+	print 'example: sudo ./Adafruit_DHT.py 2302 4 - Read from an AM2302 connected to GPIO #4'
+	sys.exit(1)
+
+# Try to grab a sensor reading.  Use the read_retry method which will retry up
+# to 15 times to get a sensor reading (waiting 2 seconds between each retry).
+humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
+
+# Note that sometimes you won't get a reading and
+# the results will be null (because Linux can't
+# guarantee the timing of calls to read the sensor).  
+# If this happens try again!
+if humidity is not None and temperature is not None:
+	print '{0:0.1f};{1:0.1f}'.format(temperature, humidity)
+else:
+	print 'Failed to get reading. Try again!'

Fremddateien/Adafruit_DHT.py

@@ -1,40 +0,0 @@
-#!/usr/bin/env python
-# -*- coding:utf-8 -*-
-
-import sys
-import dhtreader
-
-DHT11 = 11
-DHT22 = 22
-AM2302 = 22
-
-
-dhtreader.init()
-
-if len(sys.argv) != 3:
-    print("usage: {0} [11|22|2302] GPIOpin#".format(sys.argv[0]))
-    print("example: {0} 2302 Read from an AM2302 connected to GPIO #4".format(sys.argv[0]))
-    sys.exit(2)
-
-dev_type = None
-if sys.argv[1] == "11":
-    dev_type = DHT11
-elif sys.argv[1] == "22":
-    dev_type = DHT22
-elif sys.argv[1] == "2302":
-    dev_type = AM2302
-else:
-    print("invalid type, only 11, 22 and 2302 are supported for now!")
-    sys.exit(3)
-
-dhtpin = int(sys.argv[2])
-if dhtpin <= 0:
-    print("invalid GPIO pin#")
-    sys.exit(3)
-
-#print("using pin #{0}".format(dhtpin))
-t, h = dhtreader.read(dev_type, dhtpin)
-if t and h:
-	print "%.3f; %.3f" % (t, h)
-else:
-    print("Failed to read from sensor, maybe try again?")

main.sh

@@ -70,7 +70,7 @@ do
 		gpio write 13 0
 	done
 
-	luft_roh=$(sudo python /home/pi/Temperaturmessung/Fremddateien/Adafruit_DHT.py 2302 17)	# Rohdaten des Luftfeuchtigkeits-Sensors
+	luft_roh=$(sudo python /home/pi/Temperaturmessung/Fremddateien/AdafruitDHT.py 2302 17)	# Rohdaten des Luftfeuchtigkeits-Sensors
 	set -- $luft_roh
 	luft_temp=$1
 	luft_feucht=$2
@@ -78,7 +78,7 @@ do
 	do
 		gpio write 13 1
 		echo "----Luft: $luft_roh"
-		luft_roh=$(sudo python /home/pi/Temperaturmessung/Fremddateien/Adafruit_DHT.py 2302 17)	# Rohdaten des Luftfeuchtigkeits-Sensors
+		luft_roh=$(sudo python /home/pi/Temperaturmessung/Fremddateien/AdafruitDHT.py 2302 17)	# Rohdaten des Luftfeuchtigkeits-Sensors
 		set -- $luft_roh
 		luft_temp=$1
 		luft_feucht=$2