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BugFix

extras/GetHumidity.py

@@ -1,22 +1,33 @@
 #!/usr/bin/python
+
 import sys
 import Adafruit_DHT
 
 # Parse command line parameters.
-sensor_args = {'11': Adafruit_DHT.DHT11,
+sensor_args = { '11': Adafruit_DHT.DHT11,
                 '22': Adafruit_DHT.DHT22,
-                '2302': Adafruit_DHT.AM2302}
-
+                '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)
 
+# Un-comment the line below to convert the temperature to Fahrenheit.
+# temperature = temperature * 9/5.0 + 32
+
+# 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:
-    print '{0:0.1f}'.format(humidity)
+    print('{0:0.1f}'.format(humidity))
 else:
-    print 'Failed'
-    sys.exit(1)
+    print('Failed')
+    sys.exit(1)

extras/GetTemperature.py

@@ -1,3 +1,5 @@
+#!/usr/bin/python
+
 import sys
 import Adafruit_DHT
 
@@ -9,12 +11,23 @@ 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)
 
+# Un-comment the line below to convert the temperature to Fahrenheit.
+# temperature = temperature * 9/5.0 + 32
+
+# 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 temperature is not None:
-    print '{0:0.1f}'.format(temperature)
+    print('{0:0.1f}'.format(temperature))
 else:
-    print 'Failed'
+    print('Failed')
     sys.exit(1)

extras/GetTemperature1820.py

@@ -1,37 +1,37 @@
-#!/usr/bin/python
-import sys
-import os
-import glob
-import time
-
-if len(sys.argv) == 2 and sys.argv[1] == '1820':
-    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'
-else:
-    sys.exit(1)
-
-
-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
-        return temp_c
-
-temperature = read_temp()
-print '{0:0.1f}'.format(temperature)
-sys.exit(1)
+#!/usr/bin/python
+import sys
+import os
+import glob
+import time
+
+if len(sys.argv) == 2 and sys.argv[1] == '1820':
+    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'
+else:
+    sys.exit(1)
+
+
+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
+        return temp_c
+
+temperature = read_temp()
+print '{0:0.1f}'.format(temperature)
+sys.exit(1)