Added sensor example and driver for HCSR04 ultrasound distance meter

examples/sensors/HCSR04/main.py

@@ -0,0 +1,18 @@
+###############################################
+#                                             #
+#     HCSR04 ultra sound distance sensor      #
+#                                             #
+###############################################
+
+from weioLib.weio import *
+from things.input.distance.HCSR04 import HCSR04
+
+def setup():
+    attach.process(myProcess)
+
+def myProcess():
+    sensor = HCSR04(0,1) # trigger pin, echo pin
+    while True:
+        print sensor.distCentimeters()
+        #print sensor.distInches()
+        delay(100)

things/input/distance/HCSR04.py

@@ -0,0 +1,62 @@
+### 
+#
+# WEIO Web Of Things Platform
+# Copyright (C) 2013 Nodesign.net, Uros PETREVSKI, Drasko DRASKOVIC
+# All rights reserved
+#
+#               ##      ## ######## ####  #######  
+#               ##  ##  ## ##        ##  ##     ## 
+#               ##  ##  ## ##        ##  ##     ## 
+#               ##  ##  ## ######    ##  ##     ## 
+#               ##  ##  ## ##        ##  ##     ## 
+#               ##  ##  ## ##        ##  ##     ## 
+#                ###  ###  ######## ####  #######
+#
+#                    Web Of Things Platform 
+#
+# This file is part of WEIO and is published under BSD license.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+# 3. All advertising materials mentioning features or use of this software
+#    must display the following acknowledgement:
+#    This product includes software developed by the WeIO project.
+# 4. Neither the name of the WeIO nor the
+# names of its contributors may be used to endorse or promote products
+# derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY WEIO PROJECT AUTHORS AND CONTRIBUTORS ''AS IS'' AND ANY
+# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL WEIO PROJECT AUTHORS AND CONTRIBUTORS BE LIABLE FOR ANY
+# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+# Authors : 
+# Uros PETREVSKI <uros@nodesign.net>
+# Drasko DRASKOVIC <drasko.draskovic@gmail.com>
+#
+###
+
+from weioLib.weio import *
+
+class HCSR04 :
+
+    def __init__(self, trigger, echo):
+        self.trigger = trigger
+        self.echo = echo
+
+    def distCentimeters(self):
+        return HCSR04Read(self.trigger, self.echo)
+
+    def distInches(self):
+        return float(HCSR04Read(self.trigger, self.echo))/2.54