Bug fixes

Author: nelsonov

examples/systemd/listen-for-shutdown.service

@@ -3,7 +3,8 @@ Description=Listen for poweroff button
 
 [Service]
 Type=simple
-Restart=always
+Restart=on-failure
+RestartSec=5
 
 # To define the state to listen for and the pin to listen on
 # Use the "Environment" or "EnvironmentFile" options

listen-for-shutdown.py

@@ -10,27 +10,39 @@
 direction="FALLING"
 
 if len(sys.argv) > 1:
-    pin=sys.argv[1]
+    pin=int(sys.argv[1])
+    print ("Pin {} from command line".format(str(pin)), flush=True)
 elif "ENV_GPIO" in os.environ:
-    pin=os.getenv("ENV_GPIO")
+    pin=int(os.getenv("ENV_GPIO"))
+    print ("Pin {} from environment".format(str(pin)), flush=True)
+else:
+    print ("Using default pin {}".format(str(pin)), flush=True)
 
 if len(sys.argv) > 2:
     direction=sys.argv[2]
+    print ("Detect state {} from command line".format(direction), flush=True)
 elif "ENV_STATE" in os.environ:
-    direction=os.getenv("ENV_DIRECTION")
+    direction=os.getenv("ENV_STATE")
+    print ("Detect state {} environment".format(direction), flush=True)
+else:
+    print ("Detect default state {}".format(direction), flush=True)
 
-print ("Waiting for {} on GPIO pin {}".format(direction,str(pin)))
 
 GPIO.setmode(GPIO.BCM)
 
 if direction=="RISING":
+    print ("Waiting for RISING on GPIO pin {}".format(str(pin)), flush=True)
     GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)
     GPIO.wait_for_edge(pin, GPIO.RISING)
+    print ("Detected state RISING on pin {}".format(str(pin)), flush=True)
 else:
+    print ("Waiting for FALLING on GPIO pin {}".format(str(pin)), flush=True)
     GPIO.setup(pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)
     GPIO.wait_for_edge(pin, GPIO.FALLING)
+    print ("Detected state FALLING on pin {}".format(str(pin)), flush=True)
 
-print ("GPIO state detected. Shuting down")
+print ("GPIO state detected. Shuting down", flush=True)
 
-subprocess.call(['shutdown', '-p', 'now'], shell=False)
+subprocess.call(['shutdown', '-h', 'now'], shell=False)
 
+sys.exit(0)