add Adafruit_DHT python implementation

Author: houqp

Adafruit_DHT_Driver_Python/Adafruit_DHT.py

@@ -0,0 +1,40 @@
+#!/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("Temp = {0} *C, Hum = {1} %".format(t, h))
+else:
+    print("Failed to read from sensor, maybe try again?")