Added gpio_handler, changed project structure

.gitignore

@@ -1,5 +1,5 @@
-.gradle
+/websocket_bridge/.gradle
-/build/
+/websocket_bridge/build/
 !gradle/wrapper/gradle-wrapper.jar
 
 ### STS ###

gpio_handler/beerme.py

@@ -0,0 +1,123 @@
+#!/usr/bin/python
+# -*- coding:utf-8 -*-
+
+#######################
+# P26 ----> r_ch1 #
+# P20 ----> r_ch2 #
+# P21 ----> r_ch3 #
+#######################
+
+#import RPi.GPIO as GPIO
+import argparse
+import time
+
+# Channels
+r_ch1 = 26
+r_ch2 = 20
+r_ch3 = 21
+
+# time constants in seconds
+t_large_beer = 0.5
+t_small_beer = 0.5
+
+def cli_args_parser():
+    """ argument parser """
+    parser = argparse.ArgumentParser(
+            description='Lightning beer tap cli',
+            formatter_class=argparse.ArgumentDefaultsHelpFormatter
+    )
+
+    parser.add_argument(
+            '-p',
+            '--product',
+            action='store',
+            dest='product',
+            help="Product descriptionm, beer size [small, large]"
+    )
+
+    parser.add_argument(
+            '-t',
+            '--test',
+            action='store_true',
+            help="Test mode which tests all available channels"
+    )
+
+    return parser.parse_args()
+
+def __setup():
+    """ Setup all GPIOs """
+    GPIO.setwarnings(False)
+    GPIO.setmode(GPIO.BCM)
+    GPIO.setup(r_ch1,GPIO.OUT)
+    GPIO.setup(r_ch2,GPIO.OUT)
+    GPIO.setup(r_ch3,GPIO.OUT)
+
+def __set_gpio(channel=r_ch1, value=GPIO.LOW):
+    """ Try to safely change the value of a gpio """
+    try:
+        GPIO.output(channel, value)
+    except:
+        print("GPIO Error")
+        GPIO.cleanup()
+
+def gpio_test():
+    """ Test all channels """
+    # Test channel 1 
+    __set_gpio(r_ch1, GPIO.LOW)
+    print("Channel 1:The Common Contact is access to the Normal Open Contact!")
+    time.sleep(0.5)
+    __set_gpio(r_ch1, GPIO.HIGH)
+    print("Channel 1:The Common Contact is access to the Normal Closed Contact!\n")
+    time.sleep(0.5)
+
+    # Test channel 2
+    __set_gpio(r_ch2, GPIO.LOW)
+    print("Channel 2:The Common Contact is access to the Normal Open Contact!")
+    time.sleep(0.5)
+    __set_gpio(r_ch2, GPIO.HIGH)
+    print("Channel 2:The Common Contact is access to the Normal Closed Contact!\n")
+    time.sleep(0.5)
+
+    # Test channel 3
+    __set_gpio(r_ch3, GPIO.LOW)
+    print("Channel 3:The Common Contact is access to the Normal Open Contact!")
+    time.sleep(0.5)
+    __set_gpio(r_ch3, GPIO.HIGH)
+    print("Channel 3:The Common Contact is access to the Normal Closed Contact!\n")
+    time.sleep(0.5)
+
+def draw_beer(size="small", wait=t_small_beer):
+    """ Draw a delicious beer """
+    if size == "small":
+        get_small_beer(wait)
+    elif size == "large":
+        get_large_beer(wait)
+
+def get_large_beer(wait=t_large_beer):
+    """ Draw a delicious large beer """
+    __set_gpio(r_ch1, GPIO.HIGH)
+    time.sleep(wait)
+    __set_gpio(r_ch1, GPIO.LOW)
+
+def get_small_beer(wait=t_small_beer):
+    """ Draw a delicious small beer """ 
+    __set_gpio(r_ch1, GPIO.HIGH)
+    time.sleep(wait)
+    __set_gpio(r_ch1, GPIO.LOW)
+
+# if not loaded as module
+if __name__ == "__main__":
+    # parse arguments
+    args = cli_args_parser()
+
+    # choose product
+    if args.test:
+        print("Test mode enabled")
+    elif args.product == "large":
+        print("Choice: Large beer")
+        draw_beer("large", t_large_beer)
+    elif args.product == "small":
+        print("Choice: Small beer")
+        draw_beer("small", t_small_beer)
+    else:
+        print("RTFM!")