Stromsteuerung mit Arduino und Relay

void setup() {
  // Serial dialect
  Serial.begin(115200);
 
  // Status LEDs
  pinMode(3, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(10, OUTPUT);
}
 
void loop() {
  // Check for input
  check_input();
}
 
void check_input() {
  if (Serial.available() > 0) {
    if (Serial.read() == '0') {
      // Device unmounted
      // Cut power
      if (cut_power() == 1) {
        // Successful
        light_pin(3);
        delay(1000);
        dark_pin(3);
      } else {
        error();
      }
    } else {
      // Wanting device
      // Give power
      if (give_power() == 1) {
        // Successful
        light_pin(6);
        delay(1000);
        dark_pin(6);
      } else {
        error();
      }      
    }
  }
  // Execution delay
  delay(100);
}
 
int cut_power() {
  // Deactivate Relay => 0V
  digitalWrite(10, LOW);
  return 1;
}
 
int give_power() {
  // Activate Relay => 5V
  digitalWrite(10, HIGH);
  return 1;
}
 
void light_pin(int pin) {
  // Turn pin on
  digitalWrite(pin, 100);
}
 
void dark_pin(int pin) {
  // Turn pin off
  digitalWrite(pin, 0);
}
 
void error() {
  // Unknown command received
  light_pin(5);
  delay(1000);
  dark_pin(5);
}
 
// 42

# Imports
import serial, time, glib, os
from pyudev import Context, Monitor
from pyudev.glib import MonitorObserver
 
# Variables
dialect = 115200
timeout = 5
 
# Functions
def send_bit(bit):
	# Send bit to ardunio
	arduino = serial.Serial('/dev/ttyACM0', dialect)
	time.sleep(2)
	arduino.write(bit)
 
def mount(dev_id):
	os.system("bash mount.sh -d %s" % dev_id)
	return True
 
def unmount(dev_id):
	os.system("bash unmount.sh -d %s" % dev_id)
	return True
 
# Userinput
do = raw_input("Do you want to:\n\n(1) Power up the device\n(2) Power down the device\n\n>>> ")
 
if do == '1':
	send_bit('1')
	action = 'starting'
elif do == '2':
	send_bit('0')
	action = 'stopping'
 
print "\nCommand sent"
print "Waiting for response"
time.sleep(timeout)
 
def device_event(observer, device):
	if device.action == 'add' and action == 'starting':
		print "Device started successfully."
		print "Mounting device..."
		mount(device.get('DEVNAME'))
		exit()
	if device.action == 'remove' and action == 'stopping':
		unmount(device.get('DEVNAME'))
		print "Device shut down successfully."
		exit()
 
context = Context()
monitor = Monitor.from_netlink(context)
 
monitor.filter_by(subsystem='usb')
observer = MonitorObserver(monitor)
 
observer.connect('device-event', device_event)
monitor.start()
 
glib.MainLoop().run()

Da das Einbinden unter Windows und Linux unterschiedlich geregelt wird, wird die Einbindung in externen Scripten geregelt. Auf Linux mit mount.sh, unter Windows wäre das wohl ein Batch Script.