Added raspbberypi client (in python)

RaspberrypiClient_(python)/client.py

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+# should be run in raspberry with sudo 
+
+import os
+import sys
+import RPi.GPIO as GPIO
+import time
+
+from hibernate_server import hibernate_server
+
+def set_led_item(index,item,value):
+    with open("/sys/class/leds/led%d/%s" % (index,item),"w") as f:
+        f.write(value)
+
+
+# turn off red LED
+set_led_item(1,"trigger","none")
+set_led_item(1,"brightness","0")
+
+# turn on green LED
+set_led_item(0,"trigger","none")
+set_led_item(0,"brightness","0")
+time.sleep(0.5) # I had to use this trick to make the green led stay on
+set_led_item(0,"brightness","1")
+
+# should run the script with "shutdown_button" to handle shutdown button/relay
+# code inspired from this tutorial https://www.quartoknows.com/page/raspberry-pi-shutdown-button
+if len(sys.argv) == 2 and sys.argv[1] == "shutdown_button":
+    print("shutdown button enabled")
+
+    # Use the Broadcom SOC Pin numbers
+    GPIO.setmode(GPIO.BCM)
+
+    # Setup the pin with internal pullups enabled and pin in reading mode.
+    GPIO.setup(21, GPIO.IN, pull_up_down=GPIO.PUD_UP)    
+
+    # Our function on what to do when the button is pressed
+    def Shutdown(channel):
+        print("shutdown pressed")
+        brightness = 0
+        now = time.time() # get current time
+        brightness_timer = now
+        while time.time() - now < 5: # if during 5 seconds the channel is high
+            if GPIO.input(channel): # abort shutdown
+                set_led_item(0,"brightness","0")
+                time.sleep(0.2)
+                set_led_item(0,"brightness","1")
+                print("shutdown aborted")
+                return
+
+            if time.time() - brightness_timer >= 0.1: # blink green led to display response to button
+                print(brightness)
+                set_led_item(0,"brightness","%d" % brightness)
+                brightness_timer = time.time()
+                brightness = 1 - brightness
+
+        print("Shutting Down")
+
+        set_led_item(0,"trigger","none")
+        set_led_item(0,"brightness","0") # turn off green led to display that it's going to shutdown
+        hibernate_server(False) # send 'hibernate' command to PC
+        os.system("sudo shutdown -h now")    
+        exit()
+
+    # Add our function to execute when the button pressed event happens
+    GPIO.add_event_detect(21, GPIO.FALLING, callback=Shutdown, bouncetime=2000)    
+    # Now wait!
+    while 1:
+        time.sleep(1)

RaspberrypiClient_(python)/hibernate_server.py

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+# on raspberry
+import socket
+from time import sleep
+
+computer_name = "CYBERSPACE.local"
+port = 1992
+
+addr = (computer_name,port)
+
+def hibernate_server(inifinite):
+    while True:
+        try:
+            s = socket.create_connection(addr,timeout=1)
+            s.send(b"hibernate")
+            return
+        except Exception as e:
+            print(e)
+        if not inifinite:
+            return
+if __name__ == "__main__":
+    hibernate_server(True)