Ueberschalter

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Publikationen

Server

Hardware

Das ioBoard wird über das UART des Raspberry Pis angesprochen. Die Kommunikation zum Raspberry erfolgt über Ethernet, es werden keine weiteren Schnittstellen benötigt.

Software

  • raspbian (wheezy)
    • ser2net
    • lighttpd (optional für Webclient)

Konfiguration

In der Konfigurationsdatei /etc/ser2net.conf von ser2net aktiviert man folgende Konfiguration. Alle weiteren können auskommentiert werden:

2001:raw:120:/dev/ttyAMA0:9600 NONE 1STOPBIT 8DATABITS -XONXOFF -LOCAL -RTSCTS

Webserver konfigurieren

$ cd /var/
$ sudo chown pi:pi www/
$ cd cd /var/www/
$ git clone https://github.com/C3MA/uberschalter
$ cd uberschalter/web/
$ make

Aktualiseren der lighttpd Konfiguration zu folgender (Muss ggf. erst installiert werden):

server.modules = (
	"mod_cgi",
	"mod_access",
	"mod_alias",
	"mod_compress",
 	"mod_redirect",
#       "mod_rewrite",
)

#server.document-root        = "/var/www"
server.document-root        = "/var/www/uberschalter/web/www"
server.upload-dirs          = ( "/var/cache/lighttpd/uploads" )
server.errorlog             = "/var/log/lighttpd/error.log"
server.pid-file             = "/var/run/lighttpd.pid"
server.username             = "www-data"
server.groupname            = "www-data"
server.port                 = 80


index-file.names            = ( "index.php", "index.html", "index.lighttpd.html" )
url.access-deny             = ( "~", ".inc" )
static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )

compress.cache-dir          = "/var/cache/lighttpd/compress/"
compress.filetype           = ( "application/javascript", "text/css", "text/html", "text/plain" )

# default listening port for IPv6 falls back to the IPv4 port
include_shell "/usr/share/lighttpd/use-ipv6.pl " + server.port
include_shell "/usr/share/lighttpd/create-mime.assign.pl"
include_shell "/usr/share/lighttpd/include-conf-enabled.pl"

$HTTP["url"] =~ "/cgi-bin/" {
        cgi.assign = ( "" => "" )
}

cgi.assign      = (
        ".cgi"  => ""
)

Client

Android

Web

Auf dem RaspberryPi läuft auch Webserver um die Lampen zu steuern: (Zu erreichen im Raum-Netzwerk unter lampi oder 10.23.42.140.)

Lampenpositionen

Mqtt

Doku

Folgende Stati werden in MQTT geschickt:

/room/light/3/command off
/room/light/1/state on
/room/light/2/state on
/room/light/3/state off
/room/light/4/state on
/room/light/5/state on
/room/light/6/state on
/room/light/7/state on
/room/light/8/state on
/room/light/3/command off
/room/light/3/command off
/room/light/3/command on
/room/light/3/state on

Linux Befehl:

$ mosquitto_sub -v -h 10.23.42.10 -t "/room/light/#"

Eine Lampe kann mit folgenden Schema geschalten werden: /room/light/<id>/command (on|off).

Unter Linux wurde das wie folgt getestet:

$ mosquitto_pub -h 10.23.42.10 -t "/room/light/3/command" -m "off"
$ mosquitto_pub -h 10.23.42.10 -t "/room/light/3/command" -m "on"

Und hier das Sammel-Topic für die Werkstatt:

$ mosquitto_pub -h 10.23.42.10 -t "/room/light/w/command" -m "off"
$ mosquitto_pub -h 10.23.42.10 -t "/room/light/w/command" -m "on"

Skript

#!/usr/bin/python
import mosquitto, os, socket, time
from threading import Thread
from time import gmtime, strftime

#File: /usr/local/sbin/light2mqtt.py

TCP_IP = '127.0.0.1'
TCP_PORT = 2001
BUFFER_SIZE = 1024

# Prometheus
#mqttBroker="10.23.42.31"
# BigBrother
mqttBroker="10.23.42.10"

mypid = os.getpid()


client = mosquitto.Mosquitto("RoomLights"+str(mypid))

# Zeit in Sekunden, in der die Lamen nicht geschaltet werden koennen (Schutz der Lampen und relais)
LAMPSLEEPTIME=5

pollerState = True
oldStates = {}
t = None
lampSleepProtection = {}

def processState(ls):
	lightnr=1
	global oldStates
	global lampSleepProtection

	werkstattState = "off"
	for light in ls:
		lightState = "on" if int(light) == 1 else "off"
		if str(lightnr) in oldStates and lightState != oldStates[str(lightnr)]:
			client.publish("/room/light/%s/state" % lightnr, lightState, 0, True)
			print("%s Updated %s to %s" % (strftime("%Y-%m-%d %H:%M:%S", gmtime()), lightnr, lightState) )
			# Zeit festlegen, solange die Lampe nicht mehr geschalten werden darf
			lampSleepProtection[light] = int(time.time()) + LAMPSLEEPTIME

			# Mindestens eine Lampe in der Werkstatt muss an sein
		if lightnr == 5 or lightnr == 6:
			werkstattState = "on" if lightState == "on" else werkstattState
		lightnr+=1

	# Aenderungen in der Werkstatt kommunizieren:
	if 'w' in oldStates and werkstattState != oldStates['w']:
		client.publish("/room/light/w/state", werkstattState, 0, True)
		print("%s Updated Werkstatt state to %s" % (strftime("%Y-%m-%d %H:%M:%S", gmtime()), werkstattState) )

# Light ist das licht 1-6
# State ist h oder l

def switchLight(lights, state): 
	global lampSleepProtection
	s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	s.connect((TCP_IP, TCP_PORT))
	
	for l in lights:
		if (l in lampSleepProtection and int(time.time()) < int(lampSleepProtection[l])):
			print("%s Mqtt Command blocked for Lamp %s for %s seconds" % (strftime("%Y-%m-%d %H:%M:%S", gmtime()), l, str(lampSleepProtection[l] - int(time.time()) ) ))
		else:
			# Zeit festlegen, solange die Lampe nicht mehr geschalten werden darf
			lampSleepProtection[l] = int(time.time()) + LAMPSLEEPTIME
			s.send("ollpew%s%s" % (l, state))
			time.sleep(0.2)

	data = s.recv(BUFFER_SIZE)
	s.close()

	data = data.replace("\r", "").split("\n")
	if len(data) > 3:
		lightState = data[3].split(" ")[1]
	 	print("%s Proccess via Mqtt for Lamp%s to %s" % (strftime("%Y-%m-%d %H:%M:%S", gmtime()), str(lights), state) )
		processState(lightState)
	else:
	 	print("%s No answer from uC for Lamp%s to %s; only %s" % (strftime("%Y-%m-%d %H:%M:%S", gmtime()), str(lights), state, str(data)) )


def getStates():
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.connect((TCP_IP, TCP_PORT))

        s.send("ollpera")

        time.sleep(0.2)

        data = s.recv(BUFFER_SIZE)
        s.close()
        
	data = data.replace("\r", "").split("\n")
	if len(data) > 2:
		lightState = data[2].split(" ")[1]
		print("%s Process by background thread" % strftime("%Y-%m-%d %H:%M:%S", gmtime()))
		processState(lightState)
	else:
		print("%s No answer from uC getting its status; only %s" % (strftime("%Y-%m-%d %H:%M:%S", gmtime()), str(data)) )

def on_connect(rc):
    #print("Connected with result code "+str(rc))
    client.subscribe("/room/light/+/command")
    client.subscribe("/room/light/+/state")
    pollerState = True

def on_message(userdata, msg):
	global oldStates
	topic = msg.topic.strip("/").split("/")

	lightNr = str(topic[2])
	message = str(msg.payload)

	if (topic[3] == "command"):
		if (lightNr == "w" or int(lightNr) >= 1 and int(lightNr) <= 6) and message in ["on", "off"]:
			lightState = "l" if message == "off" else "h"
			# Lichter in Array gruppieren fuer die Werkstatt
			if (lightNr == "w"):
				lights = [5, 6]
			else: # Sonst array mit einem Licht erstellen
				lights = [ int(lightNr) ]
			switchLight(lights, lightState)
	elif (topic[3] == "state"):
		# Nicht die Werkstatt aktualieren, das passiwert in getStates()
		try:
			if (lightNr == "w" or int(lightNr) >= 1 and int(lightNr) <= 6):
				oldStates[lightNr] = message
		except ValueError:
			pass

def on_disconnect(userdata):
	pollerState = False
	#print "Disconnect"

def statePoller():
	while True:
		if pollerState:
			getStates()
		# Update the button only all half minutes
		time.sleep(30) 
        


client.on_connect = on_connect
client.on_message = on_message
client.on_disconnect = on_disconnect

client.will_set('/room/light/daemon/state', 'offline', 0, True)

t = Thread(target=statePoller)
t.start()

while True:
#	print "Connect..."
	client.connect(mqttBroker, 1883, 60, True)
	client.publish('/room/light/daemon/state', 'online', 0, True)
	while client.loop() == 0:
		pass
#	print "Reconnecting..."
	time.sleep(60)


Autostart im Raspberry: Folgende Zeile in /etc/rc.local einfügen: (vor dem exit 0 wenn vorhanden)

# Start the monster deamon to rule the world
/usr/bin/python /usr/local/sbin/light2mqtt.py &