update treehouses button (fixes #193) (#194)

Author: empeje

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@treehouses/cli",
-  "version": "1.2.3",
+  "version": "1.2.4",
   "description": "Thin command-line interface for Raspberry Pi low level configuration.",
   "main": "cli.sh",
   "bin": {

templates/gpio-button.py

@@ -5,28 +5,33 @@
 import time
 import subprocess
 
+ESTIMATED_STATE_DIFF_DURATION = 1
+ESTIMATED_PIN_CALLBACK_DURATION = 15
+
 GPIO.cleanup()
 GPIO.setmode(GPIO.BOARD)
 GPIO.setup(18, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
 
 prevState = None
 while True:
   state = GPIO.input(18)
+  # sleep in the loop is related to how fast the command in the block run
   if prevState == state:
+    time.sleep(ESTIMATED_STATE_DIFF_DURATION)
     continue
   elif state == 1:
     print "Pin is on"
     try:
       subprocess.check_output(['bash', '/etc/gpio-button-action-on.sh'])
     except:
       pass
-    time.sleep(15)
+    time.sleep(ESTIMATED_PIN_CALLBACK_DURATION)
   else:
     print "Pin is off"
     try:
       subprocess.check_output(['bash', '/etc/gpio-button-action-off.sh'])
     except:
       pass
-    time.sleep(15)
+    time.sleep(ESTIMATED_PIN_CALLBACK_DURATION)
 
   prevState = state